FSC20 BA en 21

User Manual
SMA FUEL SAVE CONTROLLER 2.0
FUEL
SAVE
CON
TROL
LER
ENGLISH FSC20-BA-en-21 | 100590-00.03 | Version 2.1

Legal Provisions SMA Solar Technology AG
Legal Provisions
The information contained in these documents is property of SMA Solar Technology AG. Any publication, whether in
whole or in part, requires prior written approval by SMA Solar Technology AG. Internal reproduction used solely for
the purpose of product evaluation or other proper use is allowed and does not require prior approval.
SMA Warranty
You can download the current warranty conditions from the Internet at www.SMA-Solar.com.
Software licenses
You will find the software licenses for the installed software modules on the Internet at www.SMA-Solar.com.
Trademarks
All trademarks are recognized, even if not explicitly identified as such. Missing designations do not mean that a
product or brand is not a registered trademark.
Modbus® is a registered trademark of Schneider Electric and is licensed by the Modbus Organization, Inc.
The SunSpec logo and the name SunSpec Alliance are trademarks of the SunSpec Alliance, Inc.
QR Code is a registered trademark of DENSO WAVE INCORPORATED.
Phillips® and Pozidriv® are registered trademarks of Phillips Screw Company.
Torx® is a registered trademark of Acument Global Technologies, Inc.
SMA Solar Technology AG
Sonnenallee 1
34266 Niestetal
Germany
Tel. +49 561 9522-0
Fax +49 561 9522-100
www.SMA.de
Email: info@SMA.de
Status: 5/15/2017
Copyright © 2017 SMA Solar Technology AG. All rights reserved.
2 FSC20-BA-en-21 User Manual

SMA Solar Technology AG Table of Contents
Table of Contents
1 Information on this Document..................................................................................................... 6
1.1 Validity ............................................................................................................................................................. 6
1.2 Target Group ................................................................................................................................................... 6
1.3 Additional Information..................................................................................................................................... 6
1.4 Symbols............................................................................................................................................................ 6
1.5 Typographies ................................................................................................................................................... 7
1.6 Nomenclature .................................................................................................................................................. 7
2 Safety ............................................................................................................................................ 8
2.1 Intended Use.................................................................................................................................................... 8
2.2 Safety Information ........................................................................................................................................... 8
3 Product Description ...................................................................................................................... 10
3.1 Functions........................................................................................................................................................... 10
3.2 Structure ........................................................................................................................................................... 12
3.3 Key Switch ....................................................................................................................................................... 12
3.4 Light Repeaters................................................................................................................................................. 12
3.5 Type Label........................................................................................................................................................ 13
4 User Interface ............................................................................................................................... 14
4.1 Requirements for the user interface display ................................................................................................... 14
4.2 User Groups and User Rights ......................................................................................................................... 14
4.3 Requirements for a Secure System Password ................................................................................................ 14
4.4 Design of the User Interface ........................................................................................................................... 15
4.5 Buttons in the header....................................................................................................................................... 16
4.6 Home Page for User Group "User" ................................................................................................................ 17
4.7 Home Page for User Group "Installer"........................................................................................................... 18
4.8 Configuration Wizard ..................................................................................................................................... 18
4.8.1 Structure of the Configuration Wizard ........................................................................................................... 18
4.8.2 Buttons in the Configuration Wizard .............................................................................................................. 19
4.8.3 Setting Parameters ........................................................................................................................................... 20
5 Getting Started ............................................................................................................................. 21

5.1 Logging In and Out of the User Interface ...................................................................................................... 21
5.2 Changing Passwords....................................................................................................................................... 22
5.3 Setting the User Interface Language .............................................................................................................. 22
5.4 Setting the System Time................................................................................................................................... 23
5.5 Setting Up Access via the Internet .................................................................................................................. 24
6 System Monitoring ....................................................................................................................... 26
6.1 Retrieving Display Values of the Entire PV Diesel Hybrid System................................................................. 26
6.2 Retrieving Genset Display Values................................................................................................................... 27
6.3 Retrieving PV Power Plant Display Values...................................................................................................... 30
6.4 Retrieving Storage System Display Values..................................................................................................... 32
6.5 Retrieving Display Values from Measurement Devices ................................................................................. 33
6.6 Viewing Data Records via the PV Diesel Hybrid System .............................................................................. 35
6.7 Monitoring the status of the digital switching inputs and outputs................................................................. 37
6.8 Device Information .......................................................................................................................................... 39
User Manual FSC20-BA-en-21 3

Table of Contents SMA Solar Technology AG
6.9 Processing Status Messages ........................................................................................................................... 40

6.10 Operating Mode and Setpoints ..................................................................................................................... 42
6.10.1 Overview of Operating Modes and Setpoints .............................................................................................. 42
6.10.2 Displaying Setpoints and Actual Values......................................................................................................... 44
6.10.3 Configuring the Operating Mode................................................................................................................... 44
6.10.4 Specification of Setpoints for PV Power Plant by SCADA System ................................................................ 45
7 System Settings............................................................................................................................. 46
7.1 Configuring the Utility Grid............................................................................................................................. 46
7.2 Settings for the gensets.................................................................................................................................... 46
7.2.1 Parameters for Gensets with Genset Controller ComAp IG-/IS-NTC........................................................... 46
7.2.2 Parameters for Gensets with the Genset Controller DEIF AGC .................................................................... 48
7.2.3 Parameters for Gensets with Genset Controller DSE8610 ........................................................................... 49
7.2.4 Parameters for gensets with genset controller easYgen-3000 via the CAN network ................................. 50
7.2.5 Parameters for Gensets with Genset Controller easYgen-3000 via the ESENET Gateway ....................... 51
7.2.6 Parameters for Gensets without the Genset Controller.................................................................................. 52
7.2.7 Configuring Gensets ........................................................................................................................................ 53
7.3 Configuring the PV Power Plant...................................................................................................................... 54
7.4 Setting the Storage System ............................................................................................................................. 57
7.5 Settings on the Measurement Devices ........................................................................................................... 59
7.5.1 Making General Settings on Measurement Devices ..................................................................................... 59
7.5.2 Making Detailed Settings on Measurement Devices for Internal Measurement Modules of the SMA
Fuel Save Controller ....................................................................................................................................... 61
7.5.3 Making Detailed Settings on Measurement Devices for Data Acquisition Modules................................... 64
7.5.4 Activating/Deactivating Devices..................................................................................................................... 66
7.6 Setting the Temperature and Irradiation Sensors .......................................................................................... 67
7.7 Configuring Stop of the Fuel Save Controller via Switch Input DI 7 ............................................................ 68
7.8 Handling System Settings................................................................................................................................ 71
7.8.1 Ending System Settings .................................................................................................................................... 71
7.8.2 Saving System Settings .................................................................................................................................... 71
7.8.3 Loading System Settings .................................................................................................................................. 72
7.8.4 Deleting System Settings.................................................................................................................................. 73
8 System Control ............................................................................................................................. 74

8.1 Genset control ................................................................................................................................................. 74
8.1.1 Configuring the Minimum Genset Load Threshold ........................................................................................ 74
8.1.2 Configuring Reverse Power Protection of the Gensets .................................................................................. 76
8.1.3 Setting the Supply of Sufficient Reserve Power via Gensets ......................................................................... 78
8.2 Controlling the PV power plant....................................................................................................................... 82
8.2.1 Setting the Power Factor Control for the Gensets Using the Reactive Power Release of the PV Inverters . 82
8.2.2 Setting the Control of the PV Power Plant Reactive Power According to Electrical Load............................ 85
8.2.3 Configuring MPP Calculation for PV Power Plant .......................................................................................... 88
8.3 Controlling the Battery Inverter ....................................................................................................................... 90
8.3.1 Setting the State-Of-Charge Control of the Battery........................................................................................ 90
8.3.2 Setting the Setpoints for the Storage System According to the Rise and Drop of PV Power ...................... 92
8.3.3 Setting the Charge/Discharge of the Battery According to the Rise/Drop in PV Power............................. 94
8.4 Controlling the Fuel Save Controller .............................................................................................................. 96
8.4.1 Configuring Setpoint Change Rate for PV inverters and Gensets................................................................. 96
8.4.2 Options for Specifying the Reserve Power Setpoint of the Gensets ............................................................. 98
8.4.3 Configuring PV Power Plant Management..................................................................................................... 99

SMA Solar Technology AG Table of Contents
8.5 Setting the Control of the Grid Feed-In .......................................................................................................... 101

9 System History..............................................................................................................................103
9.1 Overview of the Data Structure ...................................................................................................................... 103
9.2 Viewing System History Data.......................................................................................................................... 103
10 Starting and Stopping the System ..............................................................................................104
10.1 Stopping the SMA Fuel Save Controller and PV Power Plant ...................................................................... 104
10.2 Starting the PV Power Plant and SMA Fuel Save Controller ........................................................................ 104
10.3 Restarting the SMA Fuel Save Controller and PV Power Plant..................................................................... 105
10.4 Installing a Valid Software License................................................................................................................. 106
11 Cleaning ........................................................................................................................................107
12 Contact ..........................................................................................................................................108

1 Information on this Document SMA Solar Technology AG
1 Information on this Document

1.1 Validity
This document is valid for the device type “FSC-20-M” (SMA Fuel Save Controller 2.0) from software version 2.06.
1.2 Target Group

The tasks described in this document must only be performed by qualified persons. Qualified persons must have the
following skills:
• Training in how to deal with the dangers and risks associated with installing and using electrical devices and
installations
• Training in the installation and commissioning of electrical devices and installations
• Knowledge of all applicable standards and directives
• Knowledge of how the SMA Fuel Save Controller works and is operated
• Knowledge of and compliance with this document and all safety information
1.3 Additional Information

Links to additional information can be found at www.SMA-Solar.com:
Document title and content Document type
SMA FUEL SAVE CONTROLLER Modbus® Interface Technical Information
Information on the commissioning and configuration of the SMA Modbus inter-
face
"Gensets in PV Diesel Hybrid Systems with SMA Fuel Save Controller 2.0" Technical Information
Communication interface requirements and Genset Controller configuration
1.4 Symbols
Symbol Explanation
Indicates a hazardous situation which, if not avoided, will result in death or serious injury
Indicates a hazardous situation which, if not avoided, can result in death or serious injury
Indicates a hazardous situation which, if not avoided, can result in minor or moderate injury
Indicates a situation which, if not avoided, can result in property damage
Information that is important for a specific topic or goal, but is not safety-relevant
Indicates a requirement for meeting a specific goal
Desired result
A problem that might occur

SMA Solar Technology AG 1 Information on this Document
1.5 Typographies
Typography Use Example
bold • Display messages • Connect the insulated conductors
• Parameter to the terminals X703:1 to
X703:6.
• Terminals
• In the Select language drop-
• Slots
down list, select the desired
• Elements to be selected language.
• Elements to be entered
> • Several elements that are to be selected • Open the dialog box Change
Password via the following path
Settings > Change Password.
[Button] • Button that is to be selected or clicked • Press the button [Change my
[Key] on Password].
1.6 Nomenclature
Complete designation Designation in this document
SMA Fuel Save Controller 2.0 Fuel Save Controller
Sunny Tripower, Sunny Central CP XT, Sunny Central Storage Inverters
Electric generator with combustion engine Genset
System for the regulation and control of electric generators with com- Genset controller
bustion engine

2 Safety SMA Solar Technology AG
2 Safety
2.1 Intended Use
Together with SMA inverters, the Fuel Save Controller is a system solution for the installation of PV diesel hybrid
systems through the integration of PV power plants into local utility grids based on gensets. The Fuel Save Controller
continuously monitors the power output of the SMA inverters as well as the operating state of the gensets and loads.
On this basis, the SMA Fuel Save Controller controls the SMA inverters and adjusts its output power, where necessary.
This will ensure a stabile operation of the PV diesel hybrid system.
Only use gensets in conjunction with the Fuel Save Controller which fulfill the reverse power limits of the
Fuel Save Controller.
The power management and the communication interface of the gensets must be compatible with the
Fuel Save Controller for optimal operation of the PV diesel hybrid system. Therefore, the combined use of the
Fuel Save Controller and the gensets must be coordinated with SMA Solar Technology AG (see technical information
"Gensets in PV Diesel Hybrid Systems with SMA Fuel Save Controller 2.0").
The current and voltage measuring of the SMA Fuel Save Controller is designed for four-conductor utility grids with
three line conductors and one neutral conductor as well as for three-conductor utility grids with three line conductors. If
another grid type is used, the connection of the current transformers must be coordinated with SMA Solar Technology
AG.
The Fuel Save Controller has a Modbus/TCP and CAN interface for communicating with peripheral devices. Ensure
that all communication between the Fuel Save Controller and the gensets takes place via either the Modbus/TCP
interface or the CAN interface.
The inverter data must only be retrieved via the Fuel Save Controller. During commissioning, the correct setup of the
system network is documented. Unauthorized configuration changes of the system network after commissioning will
result in any warranty or warranty claims becoming null and void.
The product is suitable for indoor and outdoor use.
Use this product only in accordance with the information provided in the enclosed documentation and with the locally
applicable standards and directives. Any other application may cause personal injury or property damage.
Alterations to the product, e.g. changes or modifications, are only permitted with the express written permission of
SMA Solar Technology AG. Unauthorized alterations will void guarantee and warranty claims and in most cases
terminate the operating license. SMA Solar Technology AG shall not be held liable for any damage caused by such
changes.
Any use of the product other than that described in the Intended Use section does not qualify as the intended use.
The enclosed documentation is an integral part of this product. Keep the documentation in a convenient place for
future reference and observe all instructions contained therein.
Suitable personal protective equipment has to be worn by all persons working on or with the product.
The type label must remain permanently attached to the product.
2.2 Safety Information

This section contains safety information that must be observed at all times when working on or with the product.
To prevent personal injury and property damage and to ensure long-term operation of the product, read this section
carefully and observe all safety information at all times.

SMA Solar Technology AG 2 Safety
Danger to life from electric shock due to live voltage

Danger of electric shock if work is executed incorrectly or under fault conditions. An electric shock can lead to death
or serious injury.
• Disconnect the supply voltage and the measuring cables for the current- and voltage measurement before
performing any work on the Fuel Save Controller.
• Observe the five safety rules when disconnecting the supply voltage:
– Disconnect from voltage sources.
– Ensure that the device cannot be reconnected.
– Ensure that no voltage is present.
– Ground and short-circuit the device.
– Cover and isolate any adjacent live components.
Damage to the inverters, gensets or loads due to unauthorized access

Parameters of the Fuel Save Controller can be set incorrectly due to unauthorized access. When parameters are set
incorrectly, technical thresholds are being exceeded. An exceeding of technical thresholds can lead to damage of
the inverters, gensets or loads.
• Protect the Fuel Save Controller from unauthorized access.
• Remove the key from the door locks and from the key switch.
• Store the keys in a safe place.
• Ensure that only qualified persons are able to set parameters on the Fuel Save Controller.
• Ensure that access via port forwarding from the external network to the router is deactivated in the
Property damage due to dust intrusion and moisture penetration

Dust intrusion or moisture penetration can damage the Fuel Save Controller.
• Protect the Fuel Save Controller against dust and moisture.
• Do not open the Fuel Save Controller at high humidity or high dust levels.
• Close the enclosure after performing any work on the Fuel Save Controller.
• Only use the supplied cable glands when inserting cables into the Fuel Save Controller.
Destruction of gensets due to customer communication with the inverter

The network capacities within the system network are reserved for communication between the Fuel Save Controller
and the inverter. The system network can be overloaded due to unauthorized customer communication with the
inverters. Control commands of the Fuel Save Controller cannot be sent to the inverter anymore when the system
network is overloaded. This may lead to reverse currents and the destruction of gensets.
• Only operate the system network as documented in the acceptance test during commissioning.
• The inverter data can only be requested via Fuel Save Controller.

3 Product Description SMA Solar Technology AG
3 Product Description
3.1 Functions
Together with SMA inverters, the Fuel Save Controller is a system solution for the installation of PV diesel hybrid
systems through the integration of PV power plants into local utility grids based on gensets. The Fuel Save Controller
continuously monitors the power output of the SMA inverters as well as the operating state of the gensets and loads.
On this basis, the SMA Fuel Save Controller controls the SMA inverters and adjusts its output power, where necessary.
This will ensure a stabile operation of the PV diesel hybrid system.
SCADA AC
Data transmission
Internet
Modbus TCP
Measurement
* Battery system optional
FUEL SAVE DATA ACQUISITION

CONTROLLER MODULE
SENSOREN
SUNNY CENTRAL SMA PV INVERTER

STORAGE WITH PV ARRAY UTILITY GRID
* GENSETS (OPTIONAL)
LOADS
Figure 1: Regulation principle of PV systems with Fuel Save Controller
The Fuel Save Controller performs the following tasks:

• Monitoring the power and operating state of the gensets
• Monitoring the loads and state of the local grid
• Calculating suitable values for the maximum power of the inverters according to defined parameter settings and
the current status of gensets and loads
• Control and communication interface to the inverters
• Internal logging of all relevant system data (e.g. for local and remote monitoring)
• Emergency shutdown of the PV inverters under fault conditions in the PV diesel hybrid system
The basic configuration enables communication with one higher-level genset control system and inverters of the
Sunny Tripower and Sunny Central CP series. Further devices (e.g. inverters of the Sunny Central Storage series) can
be installed in consultation with SMA Solar Technology AG. To ensure system stability at all times, the
Fuel Save Controller uses Modbus/TCP or CAN to monitor whether the gensets are connected to the local utility grid
and what level of active power and reactive power the gensets are feeding into the grid.

SMA Solar Technology AG 3 Product Description
The Fuel Save Controller is equipped with a Modbus/TCP interface for local and remote monitoring as well as for the
communication with peripheral devices. Depending on the configuration, it is possible to communicate with the
following peripheral devices:
• A higher-level control system with up to eight gensets
• Controllers for up to eight gensets
The power management and the communication interface of the gensets must be compatible with the
Fuel Save Controller for optimal operation of the PV diesel hybrid system. Therefore, the combined use of the
Fuel Save Controller and the gensets must be coordinated withSMA Solar Technology AG (see technical
information "Gensets in PV Diesel Hybrid Systems with SMA Fuel Save Controller 2.0").
• up to 64 inverters
• a remote monitoring system (SCADA or user interface/FTP)
The Fuel Save Controller is also equipped with a CAN interface for communicating with up to eight gensets. Ensure
that all communication between the Fuel Save Controller and the gensets takes place via either the Modbus/TCP
interface or the CAN interface. The Fuel Save Controller is not designed to communicate with gensets via the Modbus/
TCP interface and CAN interface at the same time.
In combination with the system specifications defined during commissioning and the data from the load measurements
and grid analyses, the Fuel Save Controller calculates power values for active power and reactive power suitable for
the inverters. The power values are transmitted as setpoints to the PV inverters.
For local and remote monitoring, the Fuel Save Controller logs data on the power and operating state of the inverters
and the loads, and the power and operating state of the gensets. The logged data is saved in CSV format for
100 days and can be accessed via the integrated FTP server.
The Fuel Save Controller is equipped with up to three internal measurement modules. Each measuring module has one
measuring system for voltage measurement and two measuring systems for current measurement. All measuring
systems records the measuring values via three conductors. During network analysis, the Fuel Save Controller uses the
measured values. Further measuring systems can be implemented via an optional Data Acquisition Module in
consultation with SMA Solar Technology AG.
During commissioning of the Fuel Save Controller, the user has the possibility to activate various functions for stable
and reliable operation such as minimum genset loading and power control range. In addition, it is possible to remotely
monitor all relevant measurement data, process data and the current system status by means of SCADA or a web-
based interface.

3 Product Description SMA Solar Technology AG
3.2 Structure
A
B
C
FUEL
SAVE
CON
TROL
LER
Figure 2: Fuel Save Controller
Position Designation
A Key switch
B Operation light repeater
C Warning light repeater
3.3 Key Switch

Position Description
Start The Fuel Save Controller can be started via the Start position.
Stop Before the Fuel Save Controller can be stopped, ensure that the the current reserve power of
the gensets is sufficient for supplying the power required by the loads. Genset overload may
result in destruction of the gensets (see Section 10.1 "Stopping the SMA Fuel Save Controller
and PV Power Plant", page 104).
The Fuel Save Controller can be stopped Stopposition.
3.4 Light Repeaters

The Operation und Warning light repeaters indicate the current status of the Fuel Save Controller.
Operation Warning light Operating state Description
light repeater repeater
Both light repeater are flashing BOOT The Fuel Save Controller is starting.
alternately.
INIT The Fuel Save Controller establishes the communication
to the other devices in PV diesel hybrid system.
Flashing every Off STANDBY The Fuel Save Controller is in standby mode.
1 seconds

SMA Solar Technology AG 3 Product Description
Operation Warning light Operating state Description

light repeater repeater
Flashing every Off MANUAL The Fuel Save Controller is in manual mode. The setpoint
0.5 seconds values for the active and reactive power of the inverters
are set via the user interface of the Fuel Save Controller.
glowing Off OPERATE The Fuel Save Controller is in automatic mode and speci-
fies the setpoints for the active and reactive power of the
inverters. If the Fuel Save Controller is connected to a
SCADA system, it will use the setpoints from the SCADA
system in automatic mode.
glowing Flashing every SAFETY The Fuel Save Controller has switched to a safe state fol-
1 seconds lowing an error. The PV power can be reduced com-
pared with operation in automatic mode.
Off glowing ERROR An error has occurred in the Fuel Save Controller. Auto-
matic operation of the PV diesel hybrid system is inter-
rupted.
3.5 Type Label

The type label clearly identifies the product. The type label is located on the right-hand side of the enclosure. You will
find the following information on the type label:
• Device type (Type)
• Serial number (Serial No.)
You will require the information on the type label to use the product safely and when seeking customer support from
Service (see Section 12 "Contact", page 108).
Symbols on the Type Label

Symbol Explanation
Danger to life due to electric shock
The product operates at high voltages. All work on the product must be carried out by qualified
persons only.
Beware of a danger zone
This warning symbol indicates a danger zone. Be particularly vigilant and cautious when working
on the product.
Observe the documentation
Observe all documentation supplied with the product.
WEEE designation
Do not dispose of the product together with the household waste but in accordance with the dis-
posal regulations for electronic waste applicable at the installation site.

4 User Interface SMA Solar Technology AG
4 User Interface
4.1 Requirements for the user interface display
☐ A computer for displaying the user interface must be available.
☐ The computer must be connected to the SMA Fuel Save Controller via Ethernet.
☐ A web browser must be installed on the computer.
☐ JavaScript must be enabled in the web browser.
☐ In the operating system and in the web browser, anti-aliasing must be activated.
☐ The IP address of the Fuel Save Controller sent from the DHCP server to the local network of the PV system
operator must be known.
Supported web browsers:
• Microsoft Internet Explorer from version 9
• Google Chrome from version 40
Display resolution:
• Minimum: 800 pixels x 600 pixels
• Recommended: from 1280 pixels x 1024 pixels
4.2 User Groups and User Rights

The SMA Fuel Save Controller distinguishes between the user groups User and Installer.
User rights User group
User Installer
Retrieve values of the PV diesel hybrid system and its subsystems, e.g. ✓ ✓
the gensets, the PV power plant or the load controller (see Section 6
"System Monitoring", page 26)
Set parameters of the PV diesel hybrid system (see Section 7 "System – ✓
Settings", page 46)
Save, load and delete system settings (see Section 7, page 46) – ✓
Set control functions of the PV diesel hybrid system and subsystems – ✓
(see Section 8 "System Control", page 74)
Retrieve data for acquisition of measured values (see Section 9 "Sys- ✓ ✓
tem History", page 103)
Retrieve event and error messages (see Section 9 "System History", – ✓
page 103)
4.3 Requirements for a Secure System Password

The system password entered for your user group when you log into the Fuel Save Controller user interface for the first
time is a default system password. For security reasons, you should change the default system password as soon as
possible following commissioning (see Section 5.2, page 22).

SMA Solar Technology AG 4 User Interface
You can increase the security of your system password with the following measures:
• Select system passwords containing at least eight characters.
• Use combinations of upper-case and lower-case letters, special characters and numbers.
• Do not use names or common words (e.g., "dog", "cat", "house").
• For the system password, avoid using words that have any personal relevance to you such as the names of
persons or pets, personnel numbers, identification numbers or car license plates.
• Do not repeat names or words (e.g., "househouse" or "catcat").
• Do not use combinations of numbers or letters in the same order as they appear on your keyboard (e.g.,
"12345", "qwert").
4.4 Design of the User Interface

A
B
D
Figure 3: User interface of the Fuel Save Controller (example)
Position Designation Explanation

A Header Enables access to the main functions of the user interface (see Section 4.5 "Buttons in
the header", page 16).
Displays the current path (e.g., Home > Stations Plant Overview).
B Content area Depending on the selected page, display values, adjustable parameters or a combina-
tion of display values and adjustable parameters are shown in the content area. Addi-
tional buttons are available on individual pages.


C Status bar Displays the following information:
• Graphical display of the operating state
(see Section 3.4 "Light Repeaters", page 12)
• Status: Operating state of the Fuel Save Controller:
– BOOT: Fuel Save Controller is starting.
– INIT: Fuel Save Controller is establishing communication with the other
devices in the PV diesel hybrid system.
– STANDBY: Fuel Save Controller is in standby mode.
– MANUAL: Fuel Save Controller is in manual mode. The setpoint values for
the active and reactive power of the PV power plant are set via the user
interface.
– OPERATE: Fuel Save Controller is in automatic mode and specifies the
setpoints for the active and reactive power of the PV power plant. If the
Fuel Save Controller is connected to a SCADA system, it will use the setpoints
from the SCADA system in automatic mode.
– SAFETY: The Fuel Save Controller has switched to a safe state following an
error. The PV power can be reduced compared with operation in automatic
mode.
– ERROR: There is an error in the Fuel Save Controller. Automatic operation of
the PV diesel hybrid system is interrupted.
• Access level: User group that you are logged in with
• Software version: Current software version of the Fuel Save Controller
• Serial Number: serial number of the device
• Date and location
D Page and menu Access to the various pages and menus of the user interface
selection
4.5 Buttons in the header

Symbol Designation Description
Home Use this symbol to access the home page.
Return Use this symbol to go back to the previous page.
Plant* Use this symbol to call up the Hybrid Plant Overview page. The Hy-
brid Plant Overview page shows an overview of the display values for the PV
diesel hybrid system (see Section 6.1, page 26).
Wizard* Use this symbol to call up the configuration wizard and edit the system settings
(see Section 7, page 46).
Control * Use this symbol to set various parameters relating to system control (see Sec-
tion 8, page 74).

Symbol Designation Description

Export* Use this symbol to call up the following functions:
• Save current system settings (see Section 7.8.2, page 71)
• Load saved system settings (see Section 7.8.3, page 72)
• Delete saved system settings (see Section 7.8.4, page 73)
Logout Use this symbol to log out of the system.
* To use this button you must be logged in as an Installer.
4.6 Home Page for User Group "User"
Figure 4: Home page for user group User (example)
The home page for user group User shows an overview of all display values of the PV diesel hybrid system (see
Section 6.1 "Retrieving Display Values of the Entire PV Diesel Hybrid System", page 26).

4.7 Home Page for User Group "Installer"
Figure 5: Home page for user group Installer (example)
Button Description
Plant Overview Access to system monitoring(see Section 6, page 26)
Control Functions Access to system control (see Section 8, page 74)
Configuration Wizard Access to system settings (see Section 7, page 46)
Parameter Files Save current system settings and load/delete saved system settings (see Section 7.8,
page 71)
4.8 Configuration Wizard

4.8.1 Structure of the Configuration Wizard
To use the configuration wizard you must be logged in as an Installer.

Figure 6: Home page of the configuration wizard (example)

A Automatic configuration The automatic configuration wizard guides you through the configuration
of the entire PV diesel hybrid system. During initial commissioning of the PV
diesel hybrid system the automatic configuration wizard must be run com-
pletely. In the Manual configuration area the completion status for each
subsystem is displayed in %. Once the completion status has reached
100% for all subsystems, automatic configuration is completed.
B Manual configuration After initial commissioning, use the manual configuration wizard to carry
out settings on individual subsystems:
• Utility grid (see Section 7.1, page 46)
• Gensets (see Section 7.2.7, page 53)
• PV power plant (see Section 7.3, page 54)
• Storage system (see Section 7.4, page 57)
• Measurement devices (see Section 7.5, page 59)
• Temperature and irradiation sensors (see Section 7.6, page 67)
• Digital inputs and outputs (see Section 7.7, page 68)
In addition, the manual configuration wizard provides an overview of the
current system settings.
4.8.2 Buttons in the Configuration Wizard

To use the configuration wizard you must be logged in as an Installer.
Button Description
Add new item Add device type, e.g. a type of inverter

Button Description
Adjust Adjust configuration of a subsystem
Apply Save system settings
This saves all system settings in the active dialog. If you exit the active dialog
without saving the system settings, any system settings made since the last save
will be discarded.
Continue Wizard Continue to the next dialog
Delete config. Delete configuration of a subsystem
Discard Discard system settings
Any system settings made in the active dialog and not saved by pressing the Ap-
ply button will be discarded.
Done Close the active dialog and switch to the overview of current system settings
Remove item Remove device type, e.g. a type of inverter
Start Start automatic configuration wizard
View Show overview of current system settings
4.8.3 Setting Parameters
Risk of damage to devices by entry of incorrect parameters

Incorrect parameters may damage devices and result in system malfunctions in the PV diesel hybrid system. All
adjustable parameters are protected by the password of the user group Installer.
• Only a qualified person is permitted to set and adjust parameters.
• Only give the password for the user group Installer to qualified persons.
• Change the default passwords as soon as possible.
• Read the description of the parameters carefully and follow all instructions relating to the settings options of the
parameters.
Procedure:
1. Log in as Installer (see Section 5.1, page 21).
2. Select a menu via the page and menu selection.
3. Select desired parameter in the content area:
• To change parameters with an entry field, enter new values and press Enter after each entry.
By pressing Enter, the entered value is adopted in the user interface of the Fuel Save Controller.
• To change parameters with a checkbox, activate the required checkbox.
• To change parameters with a drop-down list, select the desired value in the appropriate drop-down list.
4. If the border of the input field flashes red, check the input and set the parameter to a valid value. To do this,
repeat the previous step.
5. To adopt current parameter settings in the control of the Fuel Save Controller, select the [Apply] button.
6. To discard current parameter settings, select the [Discard] button.

SMA Solar Technology AG 5 Getting Started
5 Getting Started
5.1 Logging In and Out of the User Interface
Log in
User group Default password
User 0000
Installer 1111
Requirements:
☐ The IP address of the Fuel Save Controller (defined during commissioning) and the subnet mask must be known.
☐ The computer used to display the user interface must have an IP address located in the same subnet as the IP
address of the Fuel Save Controller.
Example:
If the IP address of the Fuel Save Controller has been set e.g. to 172.16.1.21, the IP address for the computer
with the user interface could be e.g. 172.16.1.200. It is important that the subnet sections of both IP addresses
172.16 tally.
Risk of damage to devices by entry of incorrect parameters

Incorrect parameters may damage devices and result in system malfunctions in the PV diesel hybrid system. All
adjustable parameters are protected by the password of the user group Installer.
• Only a qualified person is permitted to set and adjust parameters.
• Only give the password for the user group Installer to qualified persons.
• Change the default passwords as soon as possible.
• Read the description of the parameters carefully and follow all instructions relating to the settings options of the
parameters.
Procedure:
1. Enter the IP address of the Fuel Save Controller marked with the extension :8080 (e.g., 172.16.1.21:8080) in
the address bar of the web browser and press Enter.
☑ The home page of the user interface appears (see Section 4.6, page 17).
2. Log into user group User or Installer with the appropriate password for the user group:
• When logging in for the first time, enter the default password of your user group.
• If you have already changed the default password of your user group, enter the changed password.
• Press the enter key.
• Select the button [Login].
☑ The home page of the selected user group appears.
✖ The message Login error appears.
The maximum number of logins for the selected user group has been reached.
• To cancel the login, answer the question Would you like to send a force log in request? with No.

5 Getting Started SMA Solar Technology AG
• To resume the login, answer the question Would you like to send a force log in request? with Yes. This
notifies users that are already logged in of your request. You will then receive a message regarding the
success or failure of your request.
Log out
A maximum of 5 Usersand 1 Installer can be logged into the user interface of the Fuel Save Controller
simultaneously. Users are not automatically logged out by closing the web browser. Therefore we recommend always
logging out of the user interface prior to closing the web browser.
If a user has not shown any activity on the user interface for more than 30 minutes, this user will be warned that he is
about to be logged out automatically. If this warning is not acknowledged within 10 seconds, the user is automatically
logged out.
Procedure:
• Click the logout link in the header.
5.2 Changing Passwords
Figure 7: Dialog box Change Password
Requirements:
☐ To change the password for the user group User, you must be logged in as User.
☐ To change the password for the user group Installer, you must be logged in as Installer.
Procedure:
1. Open the Plant Overview menu via the page and menu selection.
2. Open the Change password menu via the page and menu selection. To do this, select the down arrow button
on the scroll bar next to the page and menu selection.
3. Enter the current password in the entry field Current Password: and press the enter key.
4. Enter the new password in the entry field New Password: and press the enter key.
5. Enter the current password in the entry field Please repeat new Password: and press the enter key.
6. Select the [Apply] button.
5.3 Setting the User Interface Language

2. Open the General Settings menu via the page and menu selection.
3. In the Select language drop-down list, select the desired language.
4. If you are logged in as User, proceed as follows:

5.4 Setting the System Time
Figure 8: SNTP Settings: System time settings
Parameter Description Value

Use SNTP client Activates the automatic synchronization of the system time over the –
Internet with SNTP (Simple Network Time Protocol)
UTC time zone offset Deviation in hours from UTC (Coordinated Universal Time) -12 to +14
This parameter must be set according to the time zone applicable at
the installation site.
Date Manual date input in yyyy-mm-dd format –
Time Manual time input in hh-mm-ss format –
Address of SNTP Internet address of an SNTP server –
server
Time interval Time interval to which the system time of the Fuel Save Controller is to –
be synchronized via the SNTP server
Start SNTP server Activates the use of the Fuel Save Controller as an SNTP server –
If the SNTP server of the Fuel Save Controller is activated, the SNTP
server specifies the system time for other devices in the photovoltaic
diesel hybrid system. In these devices, SNTP must be activated and
the IP address of the Fuel Save Controller must be entered as an
SNTP server.

5 Getting Started SMA Solar Technology AG
Procedure:
2. Open the General Settings menu via the page and menu selection.
3. Set the parameter UTC time zone offset according to the local time zone (see Section 4.8.3, page 20).
4. Carry out the following steps to arrange for the system time to be specified automatically:
• Activate the Use SNTP client checkbox.
• Set the parameters Address of SNTP server and Time interval to the desired values.
5. Carry out the following steps in order to set the system time manually:
• Deactivate the Use SNTP client checkbox.
• Set the parameters Date and Time to the desired values.
6. In order to set the Fuel Save Controller for use as an SNTP server for other devices, activate the Start SNTP
server checkbox.
5.5 Setting Up Access via the Internet

In order to provide quick assistance in the event of a disturbance, the SMA Service requires access to the operating
data of the PV diesel hybrid system. Access to the operating data enables a detailed analysis of the existing error and
therefore speeds up troubleshooting.
The Fuel Save Controller is prepared to establish a secure VPN connection to Service. The VPN connection is based on
the IPsec protocol and is established by the FSC router (router in the Fuel Save Controller). To allow smooth operation
of the Fuel Save Controller, access from the local network of the PV system operator to the Fuel Save Controller is only
permitted for the following applications:
• FTP interface to the Fuel Save Controller via port 21 of the TCP protocol
• Web browser for the user interface of the Fuel Save Controller via port 80 of the TCP protocol
• Interface of the Fuel Save Controller to the SCADA system via port 502 of the TCP protocol
The FSC router enables these applications by means of port forwarding via the system router (router in the PV system
operator's local network with access to the Internet).
Ensure data security in networks
When accessing via the Internet, there is a risk that unauthorized users may access and manipulate the data or
devices in your system. Appropriate protective measures can include the following:
• Set up a firewall.
• Close unnecessary network ports.
• Only enable remote access via VPN tunnel.
• Do not set up port forwarding at the communication port in use.
Requirement for VPN connection:
☐ The system router must enable exclusive access for the FSC router via ports 500 and 4500 of the UDP protocol
for IP address 194.176.121.155 of the SMA Solar Technology AG.

Destruction of gensets due to customer communication with the inverter

The network capacities within the system network are reserved for communication between the Fuel Save Controller
and the inverter. The system network can be overloaded due to unauthorized customer communication with the
inverters. Control commands of the Fuel Save Controller cannot be sent to the inverter anymore when the system
network is overloaded. This may lead to reverse currents and the destruction of gensets.
• Only operate the system network as documented in the acceptance test during commissioning.
• The inverter data can only be requested via Fuel Save Controller.
Procedure:
1. Configure the system router so that the secure VPN connection of the Fuel Save Controller is enabled for Service.
2. Make sure that the FSC router has established an Internet connection.
3. Call Service (see Section 12 "Contact", page 108).
☑ Service will check whether the FSC router has established a VPN connection.

6 System Monitoring SMA Solar Technology AG
6 System Monitoring
6.1 Retrieving Display Values of the Entire PV Diesel Hybrid System
Overview of the display values
G
A
F
B
E
C
Figure 9: Hybrid Plant Overview: Overview of the display values for the PV diesel hybrid system (example)
Position Display group Display value Description

A Load Active power Current active power of the loads in kW
Reactive power Current reactive power of the loads in kvar
Total energy Energy consumed by the loads in MWh
B Distribution of electrical Total energy Energy consumed by the loads in MWh
energy
Genset energy Share of genset energy consumed by the loads in %
PV energy Share of the load energy consumption supplied by
the PV power plant, in %
C Distribution of electrical Total active power Active power currently consumed by the loads in
power kW
Genset power Share of genset active power currently consumed by
the loads in %
PV power Share of PV power plant active power currently con-
sumed by the loads in %

SMA Solar Technology AG 6 System Monitoring
Position Display group Display value Description

D Irradiation and temper- Ambient temp. Ambient temperature in °C
ature sensors
Module temp. Temperature of the PV modules in °C
Global irradiation PV solar irradiation in W/m2
Power MPP Active power output at the maximum power point
E Storage system Active Power Current active power of the storage system in kW
Reactive power Current reactive power of the storage system in kVAr
Total energy Energy of the storage system fed into the hybrid grid
in MWh
Active Power setpoint Current setpoint for the active power of the storage
system in kW
Reactive power setpoint Current setpoint for the reactive power of the stor-
age system in kVAr
F Gensets Active power Current active power of the gensets in kW
Reactive power Current reactive power of the gensets in kvar
Total energy Genset energy fed into the hybrid grid in MWh
Reserve power setpoint Setpoint for the reserve power of the gensets
G PV power plant Active power Current active power of the PV power plant in kW
Reactive power Current reactive power of the PV power plant in kvar
Total energy PV power plant energy fed into the hybrid grid in
MWh
Active power setpoint Setpoint for the active power of the PV power plant
Reactive power setpoint Setpoint for the reactive power of the PV power
plant
Procedure:
1. To do this you must be logged in as Installer: Go to the menu Plant Overview via the page and menu selection.
2. Choose Stations > General Overview via the page and menu selection.
6.2 Retrieving Genset Display Values

The Generator system overview page contains the display values for all of the gensets in the PV diesel hybrid
system. The genset names are assigned during commissioning.

Figure 10: Generator system overview: Display values of the gensets (example)
Display value Description Value Explanation

Selected generator Currently displayed genset – –
Nominal power Nominal power of the selected genset – –
in kW
Active Power Current active power of the selected – –
genset in kW
Power factor Power factor: specifies the ratio of ac- – –
tive power to apparent power.
Energy fed in Grid feed-in: Energy fed into the hybrid – –
grid in MWh


Mode Operating mode of the selected genset STOP Genset is out of service (e.g., for
maintenance work)
MANUAL Genset is in manual mode.
AUTO Genset is in automatic mode and
can be activated by means of the
autostart signal.
LDSS The genset is activated and deac-
tivated via the genset system’s
power management function.
GCB status Current status of the circuit breakers CLOSED The genset is connected to the hy-
that connect the genset to the hybrid brid grid.
grid
OPEN The genset is not connected to
the hybrid grid.
Procedure:
2. Choose Stations > Genset System via the page and menu selection.
☑ The designations of all the gensets are displayed in the page and menu selection.
3. Select the desired genset via the page and menu selection.

6.3 Retrieving PV Power Plant Display Values

Figure 11: Photovoltaic system overview: PV power plant display values (example)

Selected inverter Currently displayed inverter – –
Nominal power Nominal power of the inverter – –
in kW
Active power Current active power of the in- – –
verter in kW
AC voltage AC output voltage of the inverter – –
in V
DC voltage DC input voltage of the inverter – –
in V
Reactive power Current reactive power of the in- – –
verter in kVar
Active power setpoint Setpoint for the current active – –
power as a ratio of nominal
power, in %


Reactive power set- Setpoint for the current reactive – –
point power as a ratio of nominal
power, in %
Energy fed in Grid feed-in: Energy fed into the – –
hybrid grid in MWh
Operational state Current operating mode of the in- STOP The inverter is switched off.
verter
WAIT FOR DC The inverter is waiting for DC in-
put voltage.
WAIT FOR AC The inverter is waiting for an
available local grid at the AC
output.
COM ERROR Communication between inverter
and Fuel Save Controller has
failed.
WAIT FOR SET- The inverter is waiting for a set-
POINT point from the Fuel Save Con-
troller.
IN OPERATION The inverter is feeding in.
WARNING A warning has occurred in the in-
verter.
ERROR An error has occurred in the in-
verter.
Device Error Error in the inverter – See inverter documentation
Procedure:
2. Choose Stations > PV System via the page and menu selection.
☑ The designations of all the inverters are displayed in the page and menu selection.
3. Select the desired inverter via the page and menu selection.

6.4 Retrieving Storage System Display Values

The display values can only be retrieved on this page if a battery inverter has been installed.
Figure 12: Storage system display values

Selected inverter Currently displayed battery in- – –
verter
State of Charge State of charge of the battery in – –
(SOC) %
Active Power Current active power of the bat- – –
tery inverter in kW
Reactive Power Current reactive power of the – –
battery inverter in kVAr
Active power setpoint Setpoint for the active power of – –
the battery inverter in kW
Reactive power set- Setpoint for the reactive power of – –
point the battery inverter in kVAr
Maximum active Maximum charge power of the – –
power charge battery inverter in kW
Maximum active Maximum discharge power of – –
power discharge the battery inverter in kW


BSC operation mode Operating mode of the Battery STOP The storage system is switched
status System Controller off.
The Battery System Controller is WAIT The storage system is verifying its
the communication interface of connection conditions.
the battery inverter to the Battery
Management System and the PQ The storage system is connected
Fuel Save Controller. and is processing the active and
reactive power setpoints.
FAILURE An error has occurred in the stor-
age system.
UNKNOWN The status of the storage system
cannot be read.
Device status Status of the battery inverter STOP The battery inverter is switched
off.
IN OPERATION The battery inverter is feeding in.
ERROR An error has occurred in the bat-
tery inverter.
WAIT The battery inverter is waiting for
setpoints.
WARNING A warning has occurred in the
battery inverter.
COM ERROR An error has occurred in the com-
munication between the battery
inverter and the Fuel Save Con-
troller.
Device error code Storage system error For information on potential causes or corrective mea-
sures, see the documentation for the battery inverter
6.5 Retrieving Display Values from Measurement Devices

The values obtained from the measurement modules of the Fuel Save Controller are displayed on the Measurement
system overview page.

Figure 13: Display values of the measurement device (example)

Selected measure- Currently displayed measurement Internal Measure- Measurement devices connected
ment device system ment directly to the Fuel Save Con-
troller.
DAQ Measurement devices connected
to the Fuel Save Controller via a
Data Acquisition Module.
Active power Calculated total active power in – –
kW
Active power L1/L2/ Calculated active power for L1/ – –
L3 L2/L3
Reactive power Calculated reactive power in – –
kvar
Cos phi L1/L2/L3 Calculated power factor for L1/ – –
L2/L3
Frequency Measured frequency in Hz – –
Voltage Measured voltage in V – –
Energy consumed Energy consumption – –


Energy delivered Energy generation – –
Digital Input #1 Status of the digital input 1 on the OPEN The digital input is switched off
Data Acquisition Module (contact is open).
CLOSED The digital input is switched on
(contact is closed).
Digital Input #2 Status of the digital input 2 on the OPEN The digital input is switched off
Data Acquisition Module (contact is open).
CLOSED The digital input is switched on
(contact is closed).
List of measured de- List containing all the devices in – –
vices the PV diesel hybrid system to
which the currently displayed
measurement device is assigned.
Procedure:
1. To do this you must be logged in as Installer: Select the menu Plant Overview via the page and menu
selection.
2. Select Stations > Measurements via the page and menu selection.
☑ The designations of all the measurement systems are displayed in the page and menu selection.
3. Select Internal Measurement or DAQ from the page and menu selection.
4. Select the [Show] button in the List of measured device bar.
5. In the Selected measurement points menu, select the desired measurement system and select the [Close]
button.
6.6 Viewing Data Records via the PV Diesel Hybrid System

On the Historical Data page, the SMA Fuel Save Controller depicts a selection of power values over time. Different
analysis periods can be selected here:
• the last minute
• the last 5 minutes
• the last hour
• the last 24 hours

Overview of data records:
Figure 14: Diesel, PV data: Overview of data records of the PV power plant, storage system, loads, and gensets (example)
Display value Description

Engaged nominal genset power Sum of nominal power of all active gensets in kW
Load active power Active power consumed by the loads in kW
PV active power Active power of the PV power plant in kW
Genset active power Active power supplied by the gensets in kW
Battery active power Active power supplied by the storage system in kW
Procedure:
2. Choose Visualizations > Diesel, PV Data via the page and menu selection.
3. Select the desired period (e.g., Show last hour) via the drop-down list.

6.7 Monitoring the status of the digital switching inputs and outputs
Figure 15: Overview of the switching inputs and outputs
Digital inputs:
Genset # Status Current status of the circuit CLOSED Circuit breaker is closed.
(#1 to #6) breaker that connects the genset
or the utility grid to the hybrid OPEN Circuit breaker is open.
grid
Fast stop Status of digital switching input CLOSED Section 7.7, page 68
DI7
OPEN
Grid status Current status of the circuit CLOSED Circuit breaker is closed.
breaker that connects the genset
or the utility grid to the hybrid OPEN Circuit breaker is open.
grid
Custom #1 Reserve (see Fuel Save Controller installation manual)
Custom #2 Reserve (see Fuel Save Controller installation manual)
Power good Status of the supply voltage CLOSED Supply voltage is on.
OPEN Supply voltage not found.


Key switch status Status of key switch CLOSED The key switch is in the Start po-
sition.
OPEN The key switch is in the Stop posi-
tion.
Digital outputs:
Operation LED Status of the Operation light re- CLOSED The light repeater is lit up.
peater
OPEN The light repeater is off.
Warning LED Status of the Warning light re- CLOSED The light repeater is lit up.
peater
OPEN The light repeater is off.
Inverter fast stop Status of the signal generator for CLOSED The values CLOSED and OPEN
disconnecting the PV power plant are determined when connecting
from the local utility grid OPEN the contactors to the switching
outputs of the Fuel Save Con-
Custom #1 Status of the signal generator for CLOSED troller (see the Fuel Save Con-
connecting the PV power plant troller installation manual).
from the local utility grid OPEN
Procedure:
2. Choose Visualizations > Digital IO via the page and menu selection.

6.8 Device Information
Figure 16: Device information overview
Name line Description

FSC serial number Indication of the serial number of the Fuel Save Controller
State of the application Display of the status of the Fuel Save Controller application
MSys Version Indication of the installed version of the operating system
CPU temperature Display of the processor temperature in the Fuel Save Controller

6.9 Processing Status Messages
Figure 17: Alarm list in the SMA Fuel Save Controller (example)
Name of the column Description

Timestamp Time at which the message was recorded:
Status Event
Warning
If a warning occurs, automatic operation of the PV diesel hybrid system is contin-
ued.
Error
If an error occurs, automatic operation of the PV diesel hybrid system is discontin-
ued.
Warning or error no longer exists.
Event, warning or error has occurred.
Code Four-digit number of the reported event, warning or error
Description Description of the reported event, warning or error

Using the scrollbar

If not all messages can be displayed on the user interface, a scrollbar appears on the Alarm list page. You can
only use this scrollbar by means of the arrow keys.
• To call up messages recorded at an earlier time, press the up row key.
• To call up messages recorded at a later time, press the down arrow key.
Procedure:
2. Choose Operations > Alarms via the page and menu selection.
3. Select the required message types. To do this, activate the checkboxes displayed below all the required message
types, and deactivate the checkboxes for all message types that are not required.
Example: Calling up errors and warnings
Finally, in order to display the errors and warnings, perform the following steps:
• Activate the Errors and Warnings checkboxes.
• Deactivate the Info, Battery events, System events, Genset events, PV events, and Meas events
checkboxes.
4. Processing reported errors:

• Ascertain and remove the cause of the error. To do so, contact the SMA Service Line (see Section 12,
page 108).
• Once the cause of the error has been eliminated, acknowledge the error message. To do so, select the
[Acknowledge] button.
5. Ascertain the causes of reported warnings and take corrective action. To do so, contact the SMA Service Line (see
Section 12, page 108).
6. To acknowledge reported warnings or events, select the [Acknowledge] button.

6.10 Operating Mode and Setpoints

6.10.1 Overview of Operating Modes and Setpoints
B
A
C D
Figure 18: Overview of current operating state of the Fuel Save Controller (example)

Position Display group Parameters / Description

Functions
A Change control Current opera- Shows the current operating mode of the SMA Fuel Save Con-
mode tion troller:
• Automatic mode (see Activate automatic mode)
The Fuel Save Controller normally operates in Automatic
mode.
The SMA Fuel Save Controller calculates the setpoints for
the PV power plant, the battery and the reserve power to
be retained by the gensets.
• Manual mode (see Activate manual mode)
Manual mode is normally used only when the SMA Fuel
Save Controller is being commissioned. In Manual mode,
the reserve power to be kept by the gensets is specified
via the user interface.
If the Fuel Save Controller remains five minutes in the
operating mode Manual and no user is logged in, the
Fuel Save Controller switches automatically to the
operating state Standby via the SLOW STOP mode.
• SLOW STOP mode
The Fuel Save Controller stops the PV inverter (see
Section 10.1, page 104).
Activate auto- Activate Automatic mode (see Section 6.10.3, page 44)
matic mode
Activate man- Activate Manual mode (see Section 6.10.3, page 44)
ual mode
Enable SCADA Activate setpoint specification by a SCADA system (see Sec-
to send set- tion 6.10.4, page 45)
points
B System setpoints / Shows the values that the Fuel Save Controller would currently
system recommenda- send to the genset, PV and battery components if the
tion Fuel Save Controller were in automatic mode.
Genset reserve Current setpoint for the reserve power of the gensets in kW
power
PV active Current setpoint for the active power of the PV power plant in
power kW
PV reactive Current setpoint for the reactive power of the PV power plant in
power kvar
Battery active Current setpoint for the active power of the storage system in
power kW
Battery reactive Current setpoint for the reactive power of the storage system in
power kVAr

Position Display group Parameters / Description

Functions
C Live values Calculated sys- Calculated active power requirement of the loads in kW
tem load
Running genset Sum of nominal power of all active gensets in kW
capacity
PV production Active power of the PV power plant in kW
Genset power Active power of the gensets in kW
production
Available spin- Current reserve power of the gensets in kW
ning reserve
Battery active Active power of the storage system in kW
power
D System warnings Genset Over- The genset system is overloaded.
load
Genset Min- This minimum genset load has fallen below the threshold.
Load
Genset CosPhi The power factor of the genset system is outside the parameter-
ized limits.
Genset Spinnig The genset system does not provide the requested/required re-
Reserve serve power.
6.10.2 Displaying Setpoints and Actual Values

2. Choose Operations > Mode via the page and menu selection (see Section 6.10.1 "Overview of Operating
Modes and Setpoints", page 42).
6.10.3 Configuring the Operating Mode
Damage to the PV inverters, gensets, or loads caused by the input of incorrect setpoints
In Manual mode, the setpoints for the PV inverters and the reserve power to be kept by the gensets are specified via
the user interface. If the specifications are incorrect, the technical thresholds of the PV inverters, gensets, or loads can
be exceeded. An exceeding of technical thresholds can lead to damage of the PV power plant, gensets or loads.
• For continuous operation of the Fuel Save Controller, always use the automatic operating mode.
• Only activate the manual operating mode in temporary and exceptional situations (e.g., when carrying out
maintenance).
• In the operating mode, verify that the technical thresholds for PV inverters, gensets, and loads are being
adhered to:
– For the manual operating mode, at least 2 persons must be present at all times and must be trained in the
use of the manual operating mode.
– Both persons must continuously monitor the adherence to technical thresholds during manual operating
mode via the Fuel Save Controller user interface.

If the Fuel Save Controller remains five minutes in the operating mode Manual and no user is logged in, the
Fuel Save Controller switches automatically to the operating state Standby via the SLOW STOP mode.
Requirement:
☐ You must be logged in as Installer.
Procedure:
1. Choose the menu Plant Overview via the page and menu selection.
3. Select the [Activate] button in the Activate automatic mode bar
to activate Automatic mode.
4. To activate Manual mode, select the [Activate] button in the Activate manual mode bar.
5. To deactivate Manual mode, activate Automatic mode or select the logout button in the header.
6.10.4 Specification of Setpoints for PV Power Plant by SCADA System

When this function is active, a SCADA (Supervisory Control and Data Acquisition) system specifies the setpoints for the
PV power plant and the reserve power to be retained by the gensets in the Fuel Save Controller. The
Fuel Save Controller checks these setpoints. Should the setpoints issued by the SCADA system jeopardize the stability
of the PV diesel hybrid system, they will be corrected by the Fuel Save Controller. Finally the setpoints are forwarded to
the PV power plant by the Fuel Save Controller.
For information on which Modbus registers are supported, see the technical information "SMA Modbus® Interface" at
www.SMA-Solar.com.
For information on which of the supported SMA inverters support the Modbus interface of the Speedwire/Webconnect
data module, refer to the datasheet "FSC20_Modbus-DB-en-10.xlsx" at www.SMA-Solar.com.
Procedure:
3. In the Control Mode area activate the Enable SCADA to send setpoints checkbox.

7 System Settings SMA Solar Technology AG
7 System Settings
7.1 Configuring the Utility Grid
The system settings of the Fuel Save Controller can only be adjusted when the Fuel Save Controller is in STANDBY or
ERROR mode. The operating state STANDBY can be reached by stopping the SMA Fuel Save Controller.
Requirement:
Procedure:
1. Choose the menu Configuration Wizard via the page and menu selection.
2. In the Grid bar, select the [Adjust] button.
3. To activate the utility grid connection, set the parameter Enable to Yes.
4. To deactivate the utility grid connection, set the parameter Enable to No.
5. Select the [Apply] button. This will adopt the setting.
6. Select the [Continue wizard] button.
7. End the system settings (see Section 7.8.1, page 71).
7.2 Settings for the gensets

7.2.1 Parameters for Gensets with Genset Controller ComAp IG-/IS-NTC
Genset general configuration
Parameter Description Value Explanation Default
value
Remaining Remaining number of config- – – –
available de- urable gensets
vices
Number of de- Number of installed gensets 0 to 8 – 0
vices
Genset inter- Type of genset interface* ComAp IG-/IS-NTC Genset controller "ComAp None
face Type IG-NTC / ComAp IS-NTC"
with Modbus/TCP commu-
nication
ComAp access Password for access to the genset 0 to 65535 The maximum length of the 0
code controller password is 16 bits.
ComAp admin Administrator password for write 0 to 65535 The maximum length of the 0
password access to parameters of the password is 16 bits.
genset controller

SMA Solar Technology AG 7 System Settings

value
Genset setpoint Activates the writing of reserve Checkbox activated The specification of set- Deacti-
mechanism power setpoints to the genset points for the reserve vated
controller system (see Sec- power is activated.
tion 8.1.1, page 74).
Checkbox deacti- The specification of set-
vated points for the reserve
power is deactivated.
* The display of the following parameters changes according to the setting of the parameter Genset interface Type.
Generator configuration wizard: detailed configuration
value
Alias Genset / genset controller ID – – –
Enable this gen- Determines whether the Yes The Fuel Save Controller No
erator Fuel Save Controller should take takes the genset into ac-
the genset into account for con- count.
trol of the PV diesel hybrid system
No The Fuel Save Controller
does not take the genset
into account.
IP address IP address of the genset con- 172.16.1.31 to Address range defined by 172.16.1
troller (not applicable with a 172.16.1.38 the Fuel Save Controller for .31
higher-level control system) gensets
Unit-ID (Mod- Genset controller ID for the Mod- 1 to 254 – 0
bus/TCP) bus/TCP protocol
Nominal active Nominal power of the genset 0 kW to 10000 kW – 0 kW
power
Enable setpoint Activates the dynamic specifica- Yes Dynamic specification of No
mechanism tion of a setpoint for the reserve setpoints for the reserve
power power is activated.
No Dynamic specification of
setpoints for the reserve
power is deactivated.
Apply changes Configures the gensets according
to all devices to a uniform structure: the entered
nominal power is adopted and
the IP address is incremented by
1.

7.2.2 Parameters for Gensets with the Genset Controller DEIF AGC
value
vices
vices
Generator In- Type of genset interface* DEIF AGC Genset Controllers of the None
terface Type DEIF AGC Series
value
into account.
power
Apply changes Activates transfer of the current Checkbox activated Transfer of current settings Deacti-
to all devices settings for all gensets with for all gensets is activated. vated
Genset Controller DSE8610
Checkbox deacti- Transfer of current settings
vated for all gensets is deacti-
vated.

7.2.3 Parameters for Gensets with Genset Controller DSE8610

value
vices
vices
Generator In- Type of genset interface* Deep Sea 8610 Genset Controllers of the None
terface Type DSE8610 Series
value
into account.
power
Apply changes Activates transfer of the current Checkbox activated Transfer of current settings Deacti-
to all devices settings for all gensets with for all gensets is activated. vated
Genset Controller DSE8610
Checkbox deacti- Transfer of current settings
vated for all gensets is deacti-
vated.

7.2.4 Parameters for gensets with genset controller easYgen-3000 via the CAN
network
value
vices
vices
Genset inter- Type of genset interface Easygen 3000 CAN Genset controller "Wood- None
face Type ward Easygen 3000" with
CAN communication *
CAN#1 pass- Password for write access to the 0 to 9999 For setting the password, –
word genset controller refer to manufacturer docu-
mentation
Genset setpoint Activates the writing of reserve Checkbox activated The specification of set- Deacti-
mechanism power setpoints to the genset points for the reserve vated
controller system (see Sec- power is activated
tion 8.1.1, page 74).
Checkbox deacti- The specification of set-
vated points for the reserve
power is deactivated
* For settings regarding the genset controller, see technical information "Gensets in PV Diesel Hybrid Systems with
SMA Fuel Save Controller 2.0"
value
Label Genset / genset controller ID – – –
into account.
power


value
PDO-ID Proto- Genset controller ID for the proto- 0 to 2047 For more information on the 1280
col 6000 col 6000 (load distribution mes- genset controller, see the
sage) manufacturer documenta-
tion
PDO-ID Proto- Genset controller ID for the data 0 to 2047 385
col 5003 protocol 5003 (basic visualiza-
tion)
Service Data Genset controller ID for communi- 0 to 2047 1537
Object ID cating via Service Data Objects
(SDO)
Timeout for Timeout for transfer according to 20 ms to 60000 ms The specification for the 250 ms
PDO-ID Proto- protocol 6000 timeout must be higher than
col 6000 the cycle time configured in
the genset controller (for
Timeout for Timeout for transfer according to 20 ms to 60000 ms more information on the 250 ms
PDO-ID Proto- data protocol 5003 genset controller, see the
col 5003 manufacturer documenta-
Timeout for Ser- Timeout for communication via 20 ms to 60000 ms tion). 500 ms
vice Data Ob- Service Data Objects
ject ID
CAN message Display of the current capacity 0% to 100% The load in the CAN mes- 0 %
buffer load used in the CAN message store sage store is only dis-
played after restarting the
Fuel Save Controller (see
Section 10.3, page 105).
7.2.5 Parameters for Gensets with Genset Controller easYgen-3000 via the
ESENET Gateway
value
Remaining Remaining number of con- – – –
available de- figurable gensets
vices
Number of de- Number of installed 0 to 8 – 0
vices gensets
Genset inter- Type of genset interface Easygen 3000 ES- Genset controller "Woodward None
face Type ENET-Gateway Easygen 3000" with Modbus/
TCP communication via the ES-
ENET gateway *
CAN#1 pass- Password for write access 0 to 9999 For setting the password, refer to 0
word to the genset controller manufacturer documentation


value
Genset setpoint Activates the writing of re- Checkbox activated The specification of setpoints for Deacti-
mechanism serve power setpoints to the reserve power is activated. vated
the genset controller system
(see Section 8.1.1, Checkbox deacti- The specification of setpoints for
page 74). vated the reserve power is deactivated.
Parameter com- Compares the nominal Checkbox activated Comparison of genset nominal Deacti-
pare mecha- power values of the power is activated vated
nism gensets set in the Fuel Save
Controller with those of the Checkbox deacti- Comparison of genset nominal
genset controllers vated power is deactivated
* For settings regarding the genset controller, see technical information "Gensets in PV Diesel Hybrid Systems with
SMA Fuel Save Controller 2.0"
value
into account.
power
ESENET-Gate- IP address of the genset con- 172.16.1.31 to Address range defined by 172.16.1
way IP Address troller (not applicable with a 172.16.1.38 the Fuel Save Controller for .31
Unit ID (Mod- Genset controller ID for the Mod- 1 to 254 – –
7.2.6 Parameters for Gensets without the Genset Controller

value
vices


value
vices
Genset inter- Type of genset interface None The genset is monitored via None
face Type the current and voltage
measurement of the
Fuel Save Controller. A
genset controller is not
used.
value
Alias Genset ID – – –
into account.
power
7.2.7 Configuring Gensets

The system settings for the gensets are located in the menus Genset general configuration and
Generator configuration Wizard: detailed configuration. The displayed parameters depend on which gensets
are used:
• Gensets without genset controllers (see Section 7.2.6, page 52)
• Parameters for gensets with genset controller easYgen-3000, connected via the CAN network (see
Section 7.2.4, page 50)
• Parameters for gensets with genset controller easYgen-3000, connected via the ESENET gateway (see
Section 7.2.5, page 51)
• Gensets with genset controller ComAp IG-/IS-NTC (see Section 7.2.1, page 46)
Requirement:

Destruction of gensets due to insufficient reserve power

Once the SMA Fuel Save Controller and PV power plant have stopped, the PV power plant is no longer available as
energy supplier. Now only the gensets supply the loads. If the current reserve power of the gensets is insufficient for
supplying the power required by the loads, the gensets become overloaded Sustained overload of the gensets can
result in failure of the power supply and destruction of the gensets.
• Prior to stopping the Fuel Save Controller, always check whether the current reserve power of the gensets is
sufficient to cover the requirement of the loads.
– If the current reserve power of the gensets is insufficient, switch off the loads or connect additional gensets.
This increases the reserve power of the gensets.
• If the power management and the communication interface of the genset is not compatible with the
Fuel Save Controller, power management must be deactivated on the Fuel Save Controller. In this case, the
gensets must be monitored to ensure that sufficient reserve power is retained.
• Make sure that the setpoints for power management on the Fuel Save Controller and the gensets are set to the
same value.
Procedure:
2. In the Genset System bar, select the [Adjust] button.
3. Set the parameters in the menu Genset general configuration (see Section 4.8.3, page 20).
5. Set the parameters in the menu Generator configuration Wizard: detailed configuration (see Section 4.8.3,
page 20).
6. To change a particular parameter for all gensets, activate the Apply changes to all devices checkbox.
7. To change a particular parameter for individual gensets, deactivate the Apply changes to all devices
checkbox.
8. To continue with system settings, select the [Continue wizard] button.
9. Select the [Done] button.
7.3 Configuring the PV Power Plant

The system settings for the inverters are located in the menus PV general configuration and PV system
configuration wizard.

PV general configuration
Figure 19: General system settings of the PV power plant (example)
Buttons
Button Parameter
Add new item Add a device type for the PV inverter
Remove item Remove a device type for the PV inverter
Parameter
Parameter Description Value Explanation
Remaining available Remaining number of con- – –
devices figurable inverters
Type of inverter Inverter device type Sunny Tripower Type of an inverter of the Sunny Tripower se-
ries: STP 20000TL-30 / STP 25000TL-30 /
STP 15000TLEE-10 / STP 20000TLEE-10
Sunny Tripower Type of an inverter of the Sunny Tripower se-
TL-60 ries: STP 60-10
Sunny Central Type of an inverter of the Sunny Cen-
CP tral CP XT series
Number of inverters Number of installed invert- 0 to 64 –
ers of the same device type

PV detailed configuration
Figure 20: Detailed system settings of the PV power plant (example)

value
Label Type label for identifying the in- – – –
verter
Enable this in- Determines whether the Yes The Fuel Save Controller No
verter Fuel Save Controller should take takes the inverter into ac-
the inverter into account in the count.
control of the PV diesel hybrid
system. No The Fuel Save Controller
does not take the inverter
into account.
IP address IP address of the inverter 172.16.200.1 to Address range defined by –
172.16.200.64 the Fuel Save Controller for
inverters
Protocol Communication protocol used by Defined by Type of See inverter documentation Defined
the inverter inverter by Type
of in-
Different communica- verter
tion protocol
Modbus Unit Inverter ID for the Modbus/TCP 126 to 167 See inverter documentation –
ID protocol


value
Enable The Fuel Save Controller uses the Yes "Q on Demand" is being No
Q on demand inverter's "Q on Demand" func- used.
tion.
No "Q on Demand" is not be-
ing used.
Requirement:
Procedure:
2. In the PV System bar, select the [Adjust] button.
3. Set the parameters in the menu PV general configuration (see Section 4.8.3, page 20).
5. Set the parameters in the menu PV general configuration (see Section 4.8.3, page 20).
6. To change a particular parameter for all inverters, activate the Apply changes to all devices checkbox.
7. To change a particular parameter for individual inverters, deactivate the Apply changes to all devices
checkbox.
7.4 Setting the Storage System

The parameters can only be set on this page if a battery inverter has been installed.

Figure 21: Settings for the storage system in the Battery general configuration and Battery controller configuration sections.
Battery general configuration: Storage system general settings

Parameter Description Value
Remaining available de- Remaining number of configurable battery inverters –
vices
Type of battery controller Battery inverter device type* –
Quantity of battery con- Number of installed battery inverters of the same device type 0 to 16
trollers
* The Battery System Controller is the communication interface of the battery inverter to the Battery Management System and the Fuel Save
Controller.
Battery controller configuration: Battery inverter settings

value
Enable fre- Activates the frequency-depen- Yes The Fuel Save Controller No
quency droops dent active power control in the activates the frequency-de-
battery inverter (see battery in- pendent active power limi-
verter documentation). tation.
deactivates the frequency-
dependent active power
limitation.


value
Nominal droop Power alteration proportionate to 0% to 200% – 100 %
frequency the nominal power of the battery
inverter in the event of deviation
from the mains nominal fre-
quency
Upper SOC op- Maximum battery state of charge 0% to 100% – 100 %
erating limit If the maximum battery state of
charge has been exceeded, the
battery is no longer charged with
electrical energy.
Lower SOC op- Minimum battery state of charge 0% to 100% – 0 %
erating limit If the battery state of charge falls
below the minimum value, no
more electrical energy is supplied
from the battery.
Requirement:
Procedure:
2. In the Battery system bar, select the [Adjust] button.
3. Set the parameters in the Battery general configuration and Battery controller configuration sections (see
Section 4.8.3, page 20).
6. Activate monitoring for the state-of-charge limits Upper SOC operating limit and Lower SOC operating limit
(see Section 8.3.1, page 90).
7.5 Settings on the Measurement Devices

7.5.1 Making General Settings on Measurement Devices

Measurement devices general configuration
Figure 22: General system settings on the measurement devices (example)
Display group Parameter Description Value Explanation Default value

Internal measure- Remaining available Remaining number of – – –
ment devices devices configurable mea-
surement devices
Number of devices Number of measure- 0 to 6 – 0
ment devices installed
Frequency Nominal frequency 50 Hz – 50 Hz
60 Hz –
Reset energy coun- Reset the energy meters of all internal measurement modules. It is advis-
ters able to only use the Reset energy counters function during commission-
ing.
External measure- Remaining available Remaining number of 0 to 32 – –
ment devices devices configurable mea-
surement devices
Type of Measure- Measurement device DAQ-11 FSC-11-DAQ DAQ-11
ment device type
Number of devices Number of measure- 0 to 32 – 0
ment devices installed

Requirement:
Procedure:
1. Select the menu Configuration Wizard via the page and menu selection.
2. In the Measurement System bar, select the [Adjust] button.
3. To configure measurement devices that are connected via the internal measurement modules of the
SMA Fuel Save Controller, perform the following steps:
• In the menu Measurement devices general configuration, set the parameters in the area Internal
measurement devices (see SMA Fuel Save Controller user manual).
• Select the [Continue wizard] button. Doing so calls up the detailed system settings (see Section 7.5.2,
page 61).
4. To configure measurement devices that are connected via a Data Acquisition Module, perform the following
steps:
• In the menu Measurement devices general configuration, set the parameters in the area External
measurement devices (see SMA Fuel Save Controller user manual).
• Select the [Continue wizard] button. Doing so calls up the detailed system settings (see Section 7.5.3,
page 64).
7.5.2 Making Detailed Settings on Measurement Devices for Internal

Measurement Modules of the SMA Fuel Save Controller

Measurement devices detailed configuration
Figure 23: Detailed system settings for measurement devices that are connected via the internal measurement modules of the
SMA Fuel Save Controller (example)
Parameter Description Value Explanation Default value

Alias Name for identification of – – –
measurement devices
Enable this device Determines whether the Yes The Fuel Save Controller No
Fuel Save Controller should takes the measurement de-
take the measurement device into account.
vice into account in the con-
trol of the PV diesel hybrid No The Fuel Save Controller
system does not take the measure-
ment device into account.
Feeder number Current measurement num- 1 to 6 – –
ber (see
SMA Fuel Save Controller
installation manual)


Data source priority Use of the measured values Single source Connection to the device –
from the Fuel Save Con- carrying out the measure-
troller in the event of a com- ments is disabled. Only the
munication connection fail- measured values from the
ure Fuel Save Controller are
used.
Second source Connection to the device
carrying out the measure-
ments is enabled. The val-
ues communicated by the
device have priority. If com-
munication fails, the mea-
sured values from the
Fuel Save Controller are
used.
Measurement Connection to the device
priority carrying out the measure-
ues measured by the
Fuel Save Controller have
priority. In case of measure-
ment failure, the values
communicated by the de-
vice are used.
Grid type Type of grid used for cur- 3PH-3L Three-conductor utility grid –
rent and voltage measure- with three line conductors
ment
3PH-4L Four-conductor utility grid
with three line conductors
and one neutral conductor
Ratio of potential Transformation ratio for The requirements of the measurement inputs must be complied
transducer voltage measurement with (see installation manual of the Fuel Save Controller).
Ratio of current trans- Transformation ratio for cur- The requirements of the measurement inputs must be complied
ducer rent measurement with (see installation manual of the Fuel Save Controller).
Assign measurement Overview of the activated Devices can be activated or deactivated for the selected mea-
points devices, e.g. PV inverters surement device via the button [Show devices].
Requirement:
☐ You must have performed all necessary settings in the area Internal measurement devices in the menu
Measurement devices general configurations (see Section 7.5.1, page 59).
Procedure:
1. Set the desired parameters in the menu Measurement devices general configurations (see
SMA Fuel Save Controller user manual).
2. To activate or deactivate devices for the selected measurement device, select the button [Show devices] in the
Assign measurement points bar (see Section 7.5.4, page 66).


7.5.3 Making Detailed Settings on Measurement Devices for

Data Acquisition Modules
The parameters can only be set on this page if a Data Acquisition Module has been installed.
Measurement devices detailed configuration
Figure 24: Detailed system settings for measurement devices that are connected via a Data Acquisition Module (example)

Alias Name for identification of – – –
measurement devices
Enable this device Determines whether the Yes The Fuel Save Controller No
Fuel Save Controller should takes the measurement de-
take the measurement device into account.
vice into account in the con-
trol of the PV diesel hybrid No The Fuel Save Controller
system does not take the measure-
ment device into account.
IP address IP address of the Data Ac- 172.16.0.0 to The IP address of the –
quisition Module 172.17.255.2 Data Acquisition Module is
55 defined during commission-
ing.


Data source priority Use of the measured values Single source Connection to the device –
from the Fuel Save Con- carrying out the measure-
troller in the event of a com- ments is disabled. Only the
munication connection fail- measured values from the
ure Fuel Save Controller are
used.
Second source Connection to the device
carrying out the measure-
ues communicated by the
device have priority. If com-
munication fails, the mea-
sured values from the
Fuel Save Controller are
used.
Measurement Connection to the device
priority carrying out the measure-
ues measured by the
Fuel Save Controller have
priority. In case of measure-
ment failure, the values
communicated by the de-
vice are used.
Assign measurement Overview of the activated Via the button [Show devices], a menu is called up in which
points devices, e.g. PV inverters devices can be activated or deactivated for the selected mea-
surement device. Furthermore, the devices that are connected
to the digital inputs of the Data Acquisition Module are config-
ured via this menu.
Requirement:
☐ You must have performed all necessary settings in the area External measurement devices in the menu
Measurement devices general configurations (see Section 7.5.1, page 59).
Procedure:
1. Set the desired parameters in the menu Measurement devices general configurations (see
SMA Fuel Save Controller user manual).
2. Ensure that the devices connected to the digital inputs of the Data Acquisition Module are correctly configured in
the SMA Fuel Save Controller. To do so, select the button [Show devices] and compare the devices connected
to the Data Acquisition Module with the devices configured on the Fuel Save Controller.

Example: Configuration of the Digital Inputs of the Data Acquisition Module on the

Fuel Save Controller
If the genset 1 is connected to digital input DI 1 on the Data Acquisition Module and the utility grid is connected
to digital input DI 2, then the settings on the SMA Fuel Save Controller are correct in this example.
If the utility grid is connected to digital input DI 1 on the Data Acquisition Module and the genset 1 is connected
to digital input DI 2, then the settings on the SMA Fuel Save Controller are incorrect in this example. Incorrectly
configured devices must be deactivated and reactivated with the correct settings.
3. To activate or deactivate devices for the selected measurement device, select the button [Show devices] in the
Assign measurement points bar (see Section 7.5.4, page 66).
7.5.4 Activating/Deactivating Devices

Requirement:
Procedure:
1. Select the menu Configuration Wizard via the page and menu selection.
2. In the Measurement System bar, click on the button [Adjust].
3. In the menu Measurement devices general configuration, first click on the button [Apply] and then on the
button [Continue wizard]. This opens the menu Measurement devices detailed configuration.
4. In the Assign measurement points bar, click on the button [Show devices].
5. To add a device, perform the following steps:

• Select the appropriate subsystem via Select a subsystem.

• In the area Select a measurement point select either one available device or all available devices:
– To select one available device, activate the checkbox for this device.
– To select all available devices, activate the checkbox Select all.
• Click on the button [Add >>].
• Click on the button [Apply and close].
6. To remove a device, perform the following steps:
• In the area Select a measurement point select either one active device or all active devices:
– To select one active device, activate the checkbox for this device.
– To select all active devices, activate the checkbox Select all.
• Click on the button [<< Remove].
• Click on the button [Apply and close].
7.6 Setting the Temperature and Irradiation Sensors

Meteorologic general configuration
Figure 25: System settings for the temperature and irradiation sensors

value
Remaining available Remaining number of config- – – –
devices urable temperature and irradia-
tion sensors
Number of devices Number of temperature and irra- 0 to 6 – 0
diation sensors installed


value
Device type Type of temperature and irradia- SMA Me- Interface to the SMA Cluster Con- SMA Me-
tion sensors teo Sta- troller or SMA Inverter Manager teo Sta-
tion tion
SMA Me- Only make adjustments after
teo Sta- prior consultation with SMA So-
tion Mod- lar Technology AG
bus TCP
Sunspec Communication interface speci-
Mini Met fied according to SunSpec Mod-
Model bus
Requirement:
Procedure:
2. In the Meteorological data bar, select the [Adjust] button.
3. Set the parameters in the menu Meteorologic general configuration (see Section 4.8.3, page 20).
7.7 Configuring Stop of the Fuel Save Controller via Switch Input DI 7

Figure 26: System settings for digital input and outputs
Digital Input/Output Configuration

value
Use digital in- Stop of Fuel Save Activated Switch input DI 7 is used to stop the Activated
put 7 to stop Controller via switch Fuel Save Controller.
the FSC system input DI 7* When this function is activated, the pa-
rameters Signal mode and Stop
mode appear.
Deactivated Switch input DI 7 is not used to stop the
Fuel Save Controller. The parameters
Signal mode and Stop mode disap-
pear.
Signal mode Tripping signal or Normally open Tripping signal is activation of the con- Normally
switching procedure nected signal generator. closed
Normally closed Tripping signal is deactivation of the
connected signal generator.


value
Stop mode Stop mode Fast stop Fast stop: PV power plant is discon- Fast stop
nected from the utility grid immediately.
Slow Stop Slow stop: the output power of the PV
power plant is reduced gradually and
then the PV power plant is discon-
nected from the grid.
* To enable use of this function, switch input DI 7 must be connected (see Fuel Save Controller installation manual).
Custom Inputs
Parameter Description
Custom Input DI9 Freely configurable digital input to which special functions can be assigned:
• No function
• Feedback from the generator switch of genset 7
Custom Input DI10 Freely configurable digital input to which special functions can be assigned:
• No function
• Feedback from the generator switch of genset 8

• Check whether the current reserve power of the gensets is sufficient for supplying the power required by the
loads.
• If the current reserve power of the gensets is insufficient, switch off the loads or connect additional gensets. This
increases the reserve power of the gensets.
• If sufficient reserve power of the gensets cannot be ensured in operation, do not use the switch input DI 7 of the
Fuel Save Controller (Fast Stop contact of the PV power plant).
Requirement:
Procedure:
2. In the Digital Input/Output bar, select the [Adjust] button.
3. To enable the stop of the Fuel Save Controller via switch input DI 7, activate checkbox Use digital input 7 to
stop the FSC system.
4. To disable the stop of the Fuel Save Controller via switch input DI 7, deactivate checkbox Use digital input 7 to
stop the FSC system.
5. If the checkbox Use digital input 7 to stop the FSC system is activated, configure the desired values for
stopping the Fuel Save Controller via switch input DI 7 in the dropdown lists Signal mode and Stop mode.


7.8 Handling System Settings

7.8.1 Ending System Settings
Requirements:
☐ All the required settings regarding the parameters of the Fuel Save Controller must be finished and confirmed with
the [Done] button.
Procedure:
1. Save the current settings in a parameter file (see Section 7.8.2, page 71).
2. Restart the Fuel Save Controller with the saved parameter file (see Section 10.3, page 105). This accepts the
current settings for ongoing operation. The restart process for the Fuel Save Controller takes approx. 1 minute.
7.8.2 Saving System Settings
Figure 27: Saving system settings
The system settings of the Fuel Save Controller are saved in parameter files. You can overwrite the current parameter
file or create a new parameter file.
The system settings of the Fuel Save Controller can only be saved, loaded or deleted when the Fuel Save Controller is
in STANDBY or ERROR mode.
Requirement:
Maximum number of parameter files
It is possible to save up to ten different system settings in parameter files.
• Once this number has been reached, delete parameter files you no longer need (see Section 7.8.4,
page 73).
Procedure:
1. Choose the menu Parameter Files via the page and menu selection.
2. To overwrite the current parameter file, select the [Overwrite] button in the Current file bar.
3. To create a new parameter file, perform the following steps:
• Enter the desired file name in the New file bar and press Enter.
By pressing Enter, the entered value is adopted in the user interface of the Fuel Save Controller.
• Select the [Save] button.

7.8.3 Loading System Settings
Figure 28: Loading or deleting system settings
After a software update, the Fuel Save Controller restores automatically the system settings from the file that has been
saved last. Due to the newly added parameters in the new software version, the Fuel Save Controller remains in the
operating state ERROR and signals the error 2069 until the system settings are saved again and the system has been
restarted.
The new parameters, which have been added through an update, can be found in the respective release notes that are
included in the software update package.
Requirements:
☐ You must be logged into the user interface as Installer.
☐ The Fuel Save Controller and PV power plant must have been stopped (see Section 10.1, page 104).
Power supply failure when the SMA Fuel Save Controller is restarted
Before restarting the SMA Fuel Save Controller, the SMA Fuel Save Controller and PV power plant must be stopped.
It can take a few minutes for the SMA Fuel Save Controller and PV power plant to stop because the PV inverters
have to reduce their output power slowly. If the PV inverters are still feeding energy to the grid when the SMA Fuel
Save Controller is restarted, this may cause failure of the power supply.
• Once the SMA Fuel Save Controller has stopped, wait until the PV inverters have reduced their output power to
zero. This can take several minutes.
Procedure:
2. Only if no parameter file is selected, the Fuel Save Controller can be restarted with a parameter file:
• Select a parameter file in the drop-down list File database.
• In the Reboot with a selected file bar, select the [Reboot] button.
3. To overwrite the current parameter file, select the [Overwrite] button in the Current file bar.
4. Choose the parameter file with the required system settings via the dropdown list File database.
5. In the Reboot with a selected file bar, select the [Reboot] button.

7.8.4 Deleting System Settings
Figure 29: Loading or deleting system settings
Requirement:
Procedure:
2. Choose the parameter file with the required system settings via the dropdown list File database.
3. In the bar Delete selected file, press [Delete].

8 System Control SMA Solar Technology AG
8 System Control
8.1 Genset control
8.1.1 Configuring the Minimum Genset Load Threshold
Parameter overview
Figure 30: Minimum Genset Load: Settings regarding the minimum load of the genset

value
DbTolPc Deadband for error output re- -100% to 100% – 10 %
lated to the minimum genset load-
ing threshold in %.
DbTolTm Deadband timer for error output 0.1 s to 3600 s – 60 s
in seconds
GenPwrAtMinPc Minimum genset loading of the 0% to 100% – 30 %
genset system in % of the nominal
genset active power

SMA Solar Technology AG 8 System Control

value
RampTmGenPwrAt- Ramp time of the change in the 1 s to 60 s – 10 s
Nom nominal genset active power in
seconds
SpntOfsPc Setpoint offset related to the mini- -100% to 100% – 0 %
mum genset loading threshold in
%
Requirement:
Procedure:
1. Go to Control Functions > Genset control functions > Minimum genset load via the page and menu
selection.
2. Set the desired parameters (see Section 4.8.3, page 20).

8.1.2 Configuring Reverse Power Protection of the Gensets

Parameter overview
Figure 31: Reverse Power Protection: Settings for reverse power protection of the gensets

value
Enable Activate the Reverse Power Yes Activates the function Yes
Protection function.
No Deactivates the func-
tion
ErrTolDevMinPc Tolerance for error detection -100% to +100 – -5 %
upon device reverse power in %
of the nominal active genset
power in kW
ErrTolDevMinTm Timer for error output upon de- 0.1 s to 60 s – 0.1 s
vice reverse power in seconds.
WarTolDevMinPc Tolerance for warning detection -100% to +100 – 5 %
upon device reverse power in %
of the nominal active genset
power in kW
WarTolDevMinTm Timer for warning output upon 0.1 s to 60 s – 2 s
device reverse power in seconds


value
ErrTolTotPc Tolerance for error detection -100% to +100 – -5 %
upon total reverse power in % of
the nominal active genset power
in kW
ErrTolTotTm Timer for error output upon total 0.1 s to 60 s – 0.1 s
reverse power in seconds
WarTolTotPc Tolerance for warning detection -100% to +100 – 5 %
upon total reverse power in % of
the nominal active genset power
in kW
WarTolTotTm Timer for warning output upon to- 0.1 s to 60 s – 2 s
tal reverse power in seconds
Requirement:
Power supply failure caused by unexpected stop of a genset due to reverse power protection
To ensure that a genset is protected from backfeed damage, reverse power protection must be enabled and
configured in the Fuel Save Controller and the genset. The parameters on the Fuel Save Controller and the genset
must be configured so that the reverse power protection is always triggered at the Fuel Save Controller first. If the
reverse power protection first triggers in the genset, this results in an unexpected stop of the genset which cannot be
foreseen by the Fuel Save Controller. The unexpected stop of a genset may result in a power failure in the entire PV
diesel hybrid system.
• Only use gensets with reverse power protection which fulfill the reverse power limits of the Fuel Save Controller
(see installation manual of the SMA Fuel Save Controller).
• Ensure that the reverse power protection of the gensets is always active when operating the
• Adjust the reverse power protection parameters to ensure that reverse power protection always triggers first at
the Fuel Save Controller and only then at the genset.
Procedure:
1. Go to Control Functions > Genset control functions > Reverse power management via the page and
menu selection.

8.1.3 Setting the Supply of Sufficient Reserve Power via Gensets

Parameter overview
Figure 32: Genset Power Management: Power management of gensets: settings for reserve power

value
Enable Activates the Genset Power Yes Activates the function Yes
Management function.
No Deactivates the function


value
PwrMngmtMode Select the mode for power Off Off Off
management (for information If the function Genset setpoint
on power management, see mechanism is activated, this
technical information value is recommended (see Sec-
"Gensets in PV Diesel Hybrid tion 7.2.7, page 53)
Systems with
SMA Fuel Save Controller Relative to the Relative power management of
2.0") remaining gensets as a percentage of the
gensets active genset load: In the case of
switch-off, the remaining nominal
power of the gensets remaining
after switch-off is taken into ac-
count.
Relative to the Relative power management of
available gensets as a percentage of the
gensets active genset load: In the case of
switch-off, the nominal power of
the currently active gensets is
taken into account.
Absolute Power Absolute power management of
Management gensets to comply with a speci-
fied absolute reserve power of
the total system in kW.
GenTrshldTopPc Switch-on threshold for rela- 10% to 110% – 90 %
tive genset power manage-
ment in % of the /n active
genset nominal power.
GenTrshldTopAbs Switch-on threshold for abso- 0 kW to – 10 kW
lute genset power manage- 100000 kW
ment in kW
GenTrshldBotPc Switch-off threshold for rela- 0% to 90% – 35 %
tive genset power manage-
ment in relation to the active
genset nominal power in %
GenTrshldBotAbs Switch-off threshold for abso- 0 kW to – 20 kW
lute genset power manage- 100000 kW
ment in kW
SysTmResHigh System timer for detection of 0 s to 900 s – 300 s
excessive reserve power pro-
vided by the gensets
SysDbResHigh System deadband for exces- -100% to – 10 %
sive reserve power detection +100%
in % of genset active nominal
power (positive values allevi-
ate detection)


value
SysTmResLow System timer for detection of 0 s to 900 s – 90 s
insufficient reserve power pro-
vided by the gensets
SysDbResLow System deadband for insuffi- -100% to – 10 %
cient reserve power detection +100%
in % of genset active nominal
power (positive values allevi-
ate detection)
Figure 33: Genset Power Management: Power management of gensets: settings for reserve power (continued)

value
LoadPwrAtResReq Load required spinning reserve 0 kW to – 10 kW
request 100000 kW


value
SimultaneousPc Simultaneous factor for Gen- 0% to 100% – 50 %
PwrAtResSpnt while PV is request-
ing more ResPwr in % of LoadP-
wrAtRes
The value 0% means that the
events do not occur at the same
time. If the events do not occur at
the same time, the Fuel Save
Controller does not have to pro-
vide as much reserve power.
BatPwrAtResMaxPc Percentage of the available re- 0% to 120% – 70 %
serve power from battery system
which shall be considered for re-
serve power management
GenResPwrThrsld Threshold for preventing over- 50% to 120% 90 %
loading of gensets by feeding in
battery reserve power. In relation
to the genset's nominal power
PvPwrAt- Minimum injected active PV 0 kW to – 0 kW

SafeModeMin power, if system is in safe mode. 100000 kW
Requirement:

same value.
Procedure:
1. Go to Control Functions > Genset control functions > Genset power management via the page and menu
selection.

8.2 Controlling the PV power plant

8.2.1 Setting the Power Factor Control for the Gensets Using the Reactive Power
Release of the PV Inverters
Parameter overview
Figure 34: Reactive Power Control: Settings for power factor control of the gensets using the reactive power release of the PV inverters

value
Enable Enables this function. Yes Activates the function* Yes
Point of interest Power factor setpoint for either Genset Control at connection Genset
the genset system or the grid point of the genset sys-
tem
Grid Control at the grid-con-
nection point
CosPhiSpnt Power factor setpoint for either 0.1 to 1 – 0.9
the genset system or the grid
PropGain Proportional gain for the PI con- 0 to 10 – 0.1
troller, a tuning parameter


value
IntGain Integral gain for the PI controller, 0 to 10 – 0.1
a tuning parameter
TrackGain An anti windup parameter. 0 to 10 – 0.05
Keep it around 50% of integral
gain
BackcalcGain An anti windup parameter. 0 to 10 – 0.05
Keep it around 50% of integral
gain
EnableFeedForward Enables the feed forward algo- Yes Activates the feed for- Yes
rithm ward
No Deactivates the feed for-
ward
FeedForwardOffset A tuning parameter for the feed -100000 kVAr to – 0 kVAr
forward algorithm +100000 kVAr
FeedForwardGain A tuning parameter for the feed 0 to 10 – 1
forward algorithm
* When the function Reactive Power Control is activated, the function Reactive Power Management must be deactivated (see

Figure 35: Reactive Power Control: Settings for power factor control of the gensets using the reactive power release of the PV inverters
(continued)

value
SpntSplitPc To split the reactive power set- 0% to 100% – 80 %
point between the PV and battery
system. (90% => PV = 90%, Bat-
tery = 10%)
Example:
SpntSplitPc = 100%: 100% al-
lotted to the PV power plant and
0% to the storage system.
SpntSplitPc = 0%: 0% allotted
to the PV power plant and 100%
to the storage system.
PvPwrRtFilterTime First order filter time constant for 0 s to 3600 s – 1 s
the reactive power of the PV sys-
tem
BatPwrAtFilterTime Time constant for the active 0 s to 3600 s – 1 s
power of the storage system
BatPwrRtFilterTime First order filter time constant for 0 s to 3600 s – 1 s
the reactive power of the battery
system


value
GenPwrAtRtFilterTime Time constant for the active 0 s to 3600 s – 1 s
power of the genset system
LoadPwrAtRtFilterTm Time constant for the active 0 s to 3600 s – 1 s
power of the loads
Requirement:
Procedure:
1. Go to Control Functions > PV control functions > Reactive power control via the page and menu selection.
8.2.2 Setting the Control of the PV Power Plant Reactive Power According to
Electrical Load
Parameter overview
Figure 36: Reactive Power Management: Settings regarding the reactive power of the PV power plant

value
Enable Enables this function Yes Activates the function* Yes


value
RpmIslandMode Selects the mode of this function Off Reactive power manage- Off
in case of island operation ment for island operation
is deactivated.
Fixed CosPhi Reactive power manage-
ment for island operation
with set power factor
Load CosPhi Reactive power manage-
ment for island operation
with load-dependent
power factor
FixedCosPhiIsland Fixed cosPhi in island operation -1 to +1 – 0.900
(only active if selected in RpmIs-
landMode)
This parameter is only valid if the
parameter RpmIslandMode is
set to Fixed CosPhi.
RpmGridMode Selects the mode of this function Off Reactive power manage- Fixed
in case of grid operation ment for operation in the CosPhi
utility grid is deactivated.
Fixed CosPhi Reactive power manage-
ment for operation in the
utility grid with set power
factor
Load CosPhi Reactive power manage-
ment for operation in the
utility grid with load-de-
pendent power factor
FixedCosPhiGrid Fixed cosPhi in grid operation -1 to +1 – +0.900
(only active if selected in Rpm-
GridMode)
This parameter is only valid if the
parameter RpmGridMode is set
to Fixed CosPhi.
PvCosPhiMinOx Minimum overexcited power fac- 0 to +1 – 0.8
tor which the PV inverters can
provide
PvCosPhiMinUx Minimum underexcited power 0 to +1 – 0.8
factor which the PV inverters can
provide.
GenCosPhiWarnOx Warning threshold of cosPhi for 0 to +1 – 0.800
overexcited operation of gensets


value
GenCosPhiWarnTm Warning timer for cosPhi opera- 0 s to 86400 s – 10.0 s
tion of Gensets
GenCosPhiWarnUx Warning threshold of cosPhi for -1 to 0 – -0.800
underexcited operation of
gensets
* When the function Reactive Power Management is activated, the function Reactive Power Control must be deactivated (see
Figure 37: Reactive Power Management: Settings regarding the reactive power of the PV power plant (continued)

value
GridCosPhiWarnOx Warning threshold of cosPhi for 0 to +1 – 0.700
overexcited operation of grid
GridCosPhiWarnUx Warning threshold of cosPhi for -1 to 0 – -0.700
underexcited operation of grid
GridCosPhiWarnTm Warning timer for cosPhi opera- 0 s to 86400 s – 10.0 s
tion of grid
FixedCosPhiBat Fixed cosPhi in grid operation 0 to 1 – 0.900
(only active if selected in Rpm-
GridMode)

Requirement:
Procedure:
1. Go to Control Functions > PV control functions > Reactive power management via the page and menu
selection.
8.2.3 Configuring MPP Calculation for PV Power Plant

The accuracy of the determined MPP power is evaluated by the Fuel Save Controller during the run time. The
evaluation results are written to the error and event file and shown on the user interface in the error dialog at the end
of the day.
One of the three messages are generated once a day:
• #2122 - MPP accuracy: no evaluation due to small PV operation time
Today's operating time of the PV system was too short to carry out a proper evaluation.
• #2123 - MPP accuracy: negative/positive mismatch by xy/xy kWh
A negative or positive deviation has occurred during the calculation of the MPP power. The deviation is shown in
kWh by xy/xy. A negative deviation means that the MPP calculation is too low. A positive deviation means that
the MPP calculation is too high.
• #2124 - MPP accuracy: achieved the expected accuracy of 10%
The accuracy of the determined MPP lies within the required scope of 10%.
With this information, an adjustment of the parameters of the calculation is possible to increase accuracy.

Parameter overview
Figure 38: MPP Calculation: Specifications on the MPP calculation for the PV inverters
Parameter Description Value Default value

MppCalcGain In case of an inaccurate calculation of the -1000 to +1000 1
maximum power point, it can be improved by
adjusting this factor.
MppCalcOffset In case of an inaccurate calculation of the -100000 to 0
maximum power point, it can be improved by +100000
adjusting this offset.
MppNormOpCell- Normal operating cell temperature of the PV -100°C to +100°C 25°C
Temp modules. Use the PV module datasheet as a
reference.
MppPwrTempCoeff Power temperature coefficient of the PV mod- -10%/°C to +10%/ 0.1% /°C
ules. Use the PV module datasheet as a refer- °C
ence.
SafePctPv Base of MPP power which will always be 0% to 100% 20 %
available in case of PV drops in percentage
of current MPP power
CalcPvPwrAtMpp Estimated MPP power 0 kW to –
100000 kW

Requirement:
Procedure:
1. Go to Control Functions > PV control functions > MPP calculation via the page and menu selection.
3. Make sure that the parameters MppNormOpCellTemp and MppPwrTempCoeff are set in accordance with
the technical data of the PV module (see manufacturer documentation). Setting the parameters
MppNormOpCellTemp and MppPwrTempCoeff in accordance with the technical data of the PV modules
enables a reliable estimation of the PV power from the Fuel Save Controller.
8.3 Controlling the Battery Inverter

8.3.1 Setting the State-Of-Charge Control of the Battery
The parameters of the function State of charge can only be set if a battery inverter has been installed.
Parameter overview
Figure 39: State of charge: Settings regarding the thresholds for the state of charge of the battery

value
Enable Enables this function Yes Activates the function Yes
tion


value
UsePvPwr Enables function BatChrCtrl. De- Yes The battery is ideally Yes
fault ON charged with PV en-
It is advisable to always charge ergy.
the battery with excess PV en- No The battery is ideally
ergy. charged from gensets
or the utility grid
CtrlGain Control function gain 0.1 to 100000 – 10
HysPc Hysteresis of SOC range: 0% to 100% – 5 %
• If the battery state of charge
falls below the value of the
parameter SocLimLoPc, the
Fuel Save Controller begins
to charge the battery.
exceeds the sum of the
parameters SocLimLoPc
and HysPc, the Fuel Save
Controller stops charging the
battery.
SocLimHiPc Upper limit of SOC range 0% to 100% – 80 %
SocLimLoPc Lower limit of SOC range 0% to 100% – 60 %
ToRdyTm Time until module starts working 0 s to 36000 s – 180 s
after battery power is not used:
upper limit is exceeded and
the delay time has elapsed,
the Fuel Save Controller
requests that the battery be
discharged.
falls below the lower limit
and the delay time has
elapsed, the Fuel Save
Controller requests that the
battery be charged.
PwrAtLimPc Percentage of maximum avail- 0% to 100% – 10 %
able charge/discharge power to
limit the calculated setpoint
Requirement:

Procedure:
1. Go to Control Functions > Battery control functions > SOC control via the page and menu selection.
8.3.2 Setting the Setpoints for the Storage System According to the Rise and
Drop of PV Power
The parameters of the function Ramp rate control can only be set if a battery inverter has been installed.
When using a storage system in PV diesel hybrid systems: Measurement of PV power via the
measurement inputs of the Fuel Save Controller
If a storage system is implemented in the PV diesel hybrid system, the Fuel Save Controller has to calculate the
setpoints of the storage system for the charging and discharging of the battery depending on the PV power. To
correctly calculate the setpoints, the Fuel Save Controller requires the data of the PV power in a very high
temporal resolution.
For this, a current measurement input and a voltage measurement input of the Fuel Save Controller or of the
optional Data Acquisition Module must be used for capturing the PV power. The data transmitted via the internal
communication network of the PV diesel hybrid system do not have the required resolution.

Parameter overview
Figure 40: Ramp rate control: Settings regarding the calculation of setpoints for the battery according to the active power supplied by the PV
power plant

value
Enable Enable this function Yes Activates the function Yes
tion
FallRateMax Maximum permitted rate for PV 0 kW/s to – 100 kW/
drop. 100000 kW/s s
If there is a greater drop in PV
power, electrical power must be
supplied by the battery.
RiseRateMax Maximum permitted rate for PV 0 kW/s to – 100 kW/
rise. 100000 kW/s s
If there is a greater rise in PV
power, electrical power must be
stored in the battery.
StrThrsld Function output offset in case of 0 kW to – 1 kW
mismatch. 100000 kW

Requirements:
Procedure:
1. Go to Control Functions > Battery control functions > Ramp rate control via the page and menu selection.
8.3.3 Setting the Charge/Discharge of the Battery According to the Rise/Drop in

PV Power
The parameters of the function Energy Shifting can only be set if a battery inverter has been installed.
Parameter overview
Figure 41: Energy Shifting: Settings for charging the battery using PV energy

value
Enable Enables this function Yes Activates the function Yes
tion


value
ChrFromPvSpntLimPc Charging the battery from PV is 0% to 100% – 10 %
limited by this value based on the
maximum charge power of the
battery system
The battery is charged when
there is surplus PV energy. The
charging setpoint of the storage
system is limited to this value.
DisBatSpntLimPc Amount of power provided by 0% to 100% – 10 %
the battery based on the maxi-
mum discharge power of the bat-
tery system
The buffered energy is released
by the storage system if too little
PV power is available. The set-
point for discharging the battery
is limited to this value.
MinDisTm Minimum time for the battery to 60 s to 200000 s – 1800 s
provide power
The energy required must be
stored in the battery.
Requirement:
Procedure:
1. Go to Control Functions > Battery control functions > Energy Shifting via the page and menu selection.

8.4 Controlling the Fuel Save Controller

8.4.1 Configuring Setpoint Change Rate for PV inverters and Gensets
Parameter overview
Figure 42: Ramps: Settings for the setpoint change rate for inverters and gensets

GenPwrMngmtTran- Maximum rate of active power setpoint for 0%/s to 100%/s 5%/s
sRamp PV system in case of too low reserve power.
PvPwrAtFallRateMax Maximum negative rate of the active power 0%/s to 1000%/s 20%/s
setpoint for PV inverters in percent per sec-
ond (%/s) of related nominal inverter power
PvPwrAtRiseRateMax Maximum positive rate of the active power 0%/s to 1000%/s 5%/s
PvPwrRtFallRateMax Maximum negative rate of the active power 0%/s to 1000%/s 20%/s
PvPwrRtRiseRateMax Maximum positive rate of the reactive power 0%/s to 1000%/s 20%/s
ond (%/s) of related nominal inverter power.


BatPwrAtFall- Maximum negative rate of active power set- 0%/s to 1000%/s 20%/s
RateMax point for battery system related to the actual
power.
BatPwrAtRiseR- Maximum positive rate of active power set- 0%/s to 1000%/s 20%/s
ateMax point for battery system related to the actual
power
BatPwrRtFallRateMax Maximum negative rate of reactive power 0%/s to 1000%/s 20%/s
setpoint for battery system related to the ac-
tual power
BatPwrRtRiseR- Maximum positive rate of reactive power set- 0%/s to 1000%/s 20%/s
ateMax point for battery system related to the actual
power
SlowStopRamp Rate with which the complete system set- 0 s to 3600 s 20 s
points will be ramped down in case of a
stop.
Requirement:
Procedure:
1. Go to Control Functions > FSC control functions > Ramps via the page and menu selection.

8.4.2 Options for Specifying the Reserve Power Setpoint of the Gensets
Parameter overview
Figure 43: Genset Setpoints: Specification of setpoints for gensets

GenSpntTrigPctNeg The reserve power setpoint will be transmit- 0% to 10000% 20 %
ted immediately to the genset system if a neg-
ative change of the setpoint is greater than
this percentage of the connected nominal
Genset power.
GenSpntTrigPctPos The reserve power setpoint will be transmit- 0% to 10000% 20 %
ted immediately to the genset system if a pos-
itive change of the setpoint is greater than
this percentage of the connected nominal
Genset power.
GenSpntTrigTm The reserve power setpoint for the Genset 0.1 s to 3600 s 120 s
system will be transmitted /n cyclical after
this time in seconds.
Requirement:

Procedure:
1. Go to Control Functions > FSC control functions > Genset setpoints via the page and menu selection.
8.4.3 Configuring PV Power Plant Management

Parameter overview
Figure 44: Inverter management: Management of the PV power plant: Switching inverters on and off

value
tion
GenPwrAtNomIn- Proportion of allowed nominal in- 0% to 500% – 200 %
vProp verter power in relation to the to-
tal nominal power of all con-
nected Gensets
GridPwrAtNomIn- Proportion of allowed nominal 0% to 1000% – 200 %
vProp power of the inverter in relation
to the nominal connection power
of the connected utility grid


value
PvConTmOutTm The FSC waits for this time in sec- 10 s to 86400 s – 600 s
onds for the PV inverters to con-
nect. Otherwise it will throw a
timeout.
PvIdleTm After the FSC has started up or 0 s to 86400 s – 60 s
shut down inverters, further
switching actions are not per-
formed for this time in seconds.
PvOpTmSortTm The FSC will sort the PV inverters at least 3600 s – 604800
based on their operating hours s
after the given number of sec-
onds.
PvRampTm Setpoints for the PV inverters will 1 s to 300 s – 60 s
be ramped for this time in case of
switching action.
PvSpntTrigTm The active and reactive power 0.1 s to 3600 s – 0.2 s
setpoints for the PV inverters will
be transmitted cyclical after this
time in seconds.
PvTransTm Setpoints for the PV inverters will 1 s to 604800 s – 600 s
be ramped for this time in case of
switching action.
FallbackPc In case of communication issues 1% to 100% – 10 %
to the inverters, they will feed in
this percentage of nominal
power.
Requirement:
Power outage due to sudden power fluctuations in the PV power plant

If the communication between the Fuel Save Controller and the inverters is interrupted, the inverters will operate
according to their fallback settings. When communication is restored, power fluctuations may occur if the fallback
settings of the inverters deviate from the fallback settings of the Fuel Save Controller. These power fluctuations can
result in failure of the power supply in the PV diesel hybrid system.
• Ensure that the fallback settings of the inverters match the fallback settings of the Fuel Save Controller.
Procedure:
1. Go to Control Functions > FSC control functions > Inverter management via the page and menu selection.

8.5 Setting the Control of the Grid Feed-In

Parameter overview
Figure 45: Feed in protection: Settings regarding grid feed-in

value
tion
GridReleaseAllPv Inject all PV in case of connected Off Deactivates the func- Off
grid tion
On Activates the function
FipMode Ensure a minimum active power Feed in The Fuel Save Con- GridMin-
to be obtained from the grid troller feeds into the Load
utility grid up to the
value of PwrAtFeed-
InMax.
GridMinLoad The Fuel Save Con-
troller obtains power
from the utility grid up
the value of PwrAt-
GridMinLoad.


value
PwrAtFeedInMax Maximum feed-in value for active 0 kW to – 0 kW
power in case of active grid con- 100000 kW
nection
PwrAtGridMinLoad Minimum load value for active 0 kW to – 0 kW
power in case of active grid con- 100000 kW
nection
SpntOfsAbs Function output offset in case of 0 kW to – 0 kW
mismatch 100000 kW
WarTrshldAbs Warning threshold of grid's ac- 0 kW to – 0 kW
tive power 100000 kW
ErrTrshldAbs Error threshold of grid's active 0 kW to – -10 kW
power 100000 kW
WarTrshldTm Warning timer of grid's active 0.1 s to 86400 s – 10.0 s
power
Error timer of grid's active power
ErrTrshldTm Error timer of grid's active power 0.1 s to 86400 s – 5.0 s
Requirement:
Procedure:
1. Go to Control Functions > Grid control functions > Feed in protection via the page and menu selection.

SMA Solar Technology AG 9 System History
9 System History
9.1 Overview of the Data Structure
The SMA Fuel Save Controller records the system history and saves three files with different data each day:
• One file with data for fast acquisition of measured values
• One file with data for slow acquisition of measured values
• One file with event and error messages
Once the SMA Fuel Save Controller has recorded the system history for 100 days in a ring buffer, it starts to overwrite
the files.
The files are saved in CSV format and recorded according to the following pattern:
File content Name structure Save Path for open access Read access for
interval user group
Data for fast acquisi- LogDataFast_JJJJ-MM- 10 s /cfs0/fsc/log/DataFast/ … User and Installer
tion of measured val- TT.csv
ues
Data for slow acquisi- LogDataSlow_JJJJ-MM- 300 s /cfs0/fsc/log/DataSlow/ … User and Installer
tion of measured val- TT.csv
ues
Event and error mes- ErrEvtLog_JJJJ-MM-TT.csv – /cfs0/fsc/log/ErrEvt/ … only
sages Installer
System settings – – /cfs0/fsc/param/ … only
Installer
9.2 Viewing System History Data

Requirements:
☐ To access the files, a file management program (e.g., Windows Explorer) or web browser (e.g., Google Chrome)
must be installed.
☐ The file management program or web browser must have an FTP function.
☐ To open the files, a spreadsheet program or text editor must be installed.
Procedure:
1. Enter the IP address of the SMA Fuel Save Controller ftp://172.16.1.21 in the address bar of the file
management program or web browser.
2. Enter password(see Section 5.1 "Logging In and Out of the User Interface", page 21).
3. Enter the desired path (see Section 9.1 "Overview of the Data Structure", page 103).
4. Open the required file.

10 Starting and Stopping the System SMA Solar Technology AG
10 Starting and Stopping the System

10.1 Stopping the SMA Fuel Save Controller and PV Power Plant
The SMA Fuel Save Controller and PV power plant can be stopped in two ways:
• Stopping the SMA Fuel Save Controller and PV power plant using the switch cabinet key
• Stopping the SMA Fuel Save Controller and PV power plant via the user interface

same value.
Stopping the SMA Fuel Save Controller and PV power plant using the switch cabinet key
1. Turn the SMA Fuel Save Controller key switch to Stop.
2. Wait until the SMA Fuel Save Controller has stopped the inverters. This can take several minutes.
3. To disconnect the inverters from the AC grid, disconnect the inverters from voltage sources (see inverter
documentation).
Stopping the SMA Fuel Save Controller and PV power plant via the user interface
Requirement:
Procedure:
1. Log into the user interface as Installer.
2. Choose Settings > General via the page and menu selection.
3. In the Start/Stop FSC system bar, select the [Stop FSC] button.
4. Wait until the SMA Fuel Save Controller has stopped the inverters. This can take several minutes.
☑ The Fuel Save Controller is off message is displayed.
5. To disconnect the inverters from the AC grid, disconnect the inverters on the DC main distributor from voltage
sources (see inverter documentation).
10.2 Starting the PV Power Plant and SMA Fuel Save Controller
1. Start the gensets (see system documentation).
2. Connect supply voltage to the SMA Fuel Save Controller (see Fuel Save Controller installation manual).

SMA Solar Technology AG 10 Starting and Stopping the System
3. Connect the current and voltage measurement inputs (see Fuel Save Controller installation manual).
4. To start the PV power plant and SMA Fuel Save Controller using the switch cabinet key, turn the SMA Fuel Save
Controller key switch to Start.
5. To start the PV power plant and SMA Fuel Save Controller via the user interface, carry out the following steps:
• Log into the user interface as Installer.
• Choose Settings > General via the page and menu selection.
• In the Start/Stop FSC system bar, select the [Start FSC] button.
☑ The Fuel Save Controller is on message is displayed.
6. Connect the PV inverters on the DC main distributor to the AC grid (see inverter documentation).
☑ The PV power plant synchronizes to the available AC grid. How long synchronization takes depends on the
current solar irradiation on the PV modules and on the current power required by the loads.
☑ The Fuel Save Controller reports the event 2097: Valid product licence found: The Fuel Save Controller is fully
functional.
✖ The Fuel Save Controller generates a warning: 2098: No product licence found, 2099: Product licence is
not valid, or 2100: Product licence is empty. This prevents access to the optional functions of the
The software license installed may be invalid.
• Install a valid software license (see Section 10.4, page 106).
10.3 Restarting the SMA Fuel Save Controller and PV Power Plant
Requirement:
☐ The SMA Fuel Save Controller and PV power plant must have been stopped (see Section 10.1, page 104).
Power supply failure when the SMA Fuel Save Controller is restarted
Before restarting the SMA Fuel Save Controller, the SMA Fuel Save Controller and PV power plant must be stopped.
It can take a few minutes for the SMA Fuel Save Controller and PV power plant to stop because the PV inverters
have to reduce their output power slowly. If the PV inverters are still feeding energy to the grid when the SMA Fuel
Save Controller is restarted, this may cause failure of the power supply.
• Once the SMA Fuel Save Controller has stopped, wait until the PV inverters have reduced their output power to
zero. This can take several minutes.

10 Starting and Stopping the System SMA Solar Technology AG
Procedure:
1. Choose the menu Plant Overview via the page and menu selection.
2. Choose Settings > General via the page and menu selection.
3. In the Reboot FSC system bar, select the [Reboot] button.
☑ The PV power plant synchronizes to the available AC grid. How long synchronization takes depends on the
current solar irradiation on the PV modules and on the current power required by the loads.
☑ The Fuel Save Controller reports the event 2097: Valid product licence found: The Fuel Save Controller is fully
functional.
✖ The Fuel Save Controller generates a warning: 2098: No product licence found, 2099: Product licence is
not valid, or 2100: Product licence is empty. This prevents access to the optional functions of the
The software license installed may be invalid.
• Install a valid software license (see Section 10.4, page 106).
10.4 Installing a Valid Software License

Under adverse circumstances, the Fuel Save Controller generates a warning: 2098: No product licence found,
2099: Product licence is not valid, or 2100: Product licence is empty when starting or restarting.
Cause:
The software license installed on the Fuel Save Controller may be damaged or invalid for some other reason.
Corrective measures:
1. Request a valid software license from Service (see Section 12, page 108).
☑ You will receive an e-mail with the valid software license with the file fsc.lic.
2. Open an FTP client on the computer to display the user interface.
3. Connect with the Fuel Save Controller via FTP (e.g., via ftp://172.16.1.21).
4. Open the folder cfc0/fsc/newfiles/.
5. Copy the file fsc.lic into the folder cfc0/fsc/newfiles/.
6. Restart the Fuel Save Controller (see Section 10.3, page 105).

SMA Solar Technology AG 11 Cleaning
11 Cleaning
Additionally required maintenance material (not included in the scope of delivery):
☐ Use touch-up sticks, paint brushes, spray paint or 2K-PUR acrylic paint to repair minor surface damage.
☐ Use touch-up paint or 2K-PUR acrylic paint to repair extensive surface damage.
Danger to life from electric shock due to live voltage

Danger of electric shock if work is executed incorrectly or under fault conditions. An electric shock can lead to death
or serious injury.
• Disconnect the supply voltage and the measuring cables for the current- and voltage measurement before
performing any work on the Fuel Save Controller.
• Observe the five safety rules when disconnecting the supply voltage:
– Disconnect from voltage sources.
– Ensure that the device cannot be reconnected.
– Ensure that no voltage is present.
– Ground and short-circuit the device.
– Cover and isolate any adjacent live components.
Damage to the Fuel Save Controller due to moisture penetration

Penetrating moisture can cause short circuits and damage the Fuel Save Controller.
• Use a moist cloth to remove dust. Do not use solvents, abrasives or other corrosive substances.
Procedure:
1. Check whether the Fuel Save Controller shows any externally visible damage.
If the Fuel Save Controller shows any externally visible damage, carry out the following measures:
• Decommission the SMA Fuel Save Controller (see Fuel Save Controller installation manual).
• Contact the SMA Service Line (see Section 12, page 108).
2. Remove coarse dirt contamination from the outside of the enclosure with a soft brush or similar tool.
3. Remove dust from the outside of the enclosure using a moist cloth.
4. Check the enclosure for corrosion and eliminate if necessary:
• Use touch-up sticks, paint brushes, spray paint or, alternatively, 2K-PUR acrylic paint to repair minor surface
damage. When doing so, adhere to the relevant instructions of the paint manufacturer.
• Use touch-up paint or 2K-PUR acrylic paint to repair extensive surface damage. When doing so, adhere to
the relevant instructions of the paint manufacturer.

12 Contact SMA Solar Technology AG
12 Contact
If you have technical problems with our products, please contact the SMA Service Line. We require the following
information in order to provide you with the necessary assistance:
• Device type
• Serial number
• Error- and warning messages displayed
• Type of genset control unit used
Danmark SMA Solar Technology AG Belgien SMA Benelux BVBA/SPRL
Deutschland Niestetal Belgique Mechelen
Österreich Sunny Boy, Sunny Mini Central, België +32 15 286 730
Schweiz Sunny Tripower: +49 561 9522‑1499 Luxemburg SMA Online Service Center:
Monitoring Systems Luxembourg www.SMA-Service.com
(Kommunikationsprodukte):
+49 561 9522‑2499 Nederland
Fuel Save Controller Česko SMA Service Partner TERMS a.s.

(PV-Diesel-Hybridsysteme): Magyarország +420 387 6 85 111
+49 561 9522-3199
Slovensko SMA Online Service Center:
Sunny Island, Sunny Boy Storage, www.SMA-Service.com
Sunny Backup, Hydro Boy:
+49 561 9522-399 Türkiye SMA Service Partner DEKOM Ltd. Şti.
Sunny Central, Sunny Central Storage: +90 24 22430605
+49 561 9522-299 SMA Online Service Center:
SMA Online Service Center: www.SMA-Service.com
www.SMA-Service.com
France SMA France S.A.S. Ελλάδα SMA Service Partner AKTOR FM.
Lyon Κύπρος Αθήνα
+33 472 22 97 00 +30 210 8184550
SMA Online Service Center : SMA Online Service Center:
www.SMA-Service.com www.SMA-Service.com
España SMA Ibérica Tecnología Solar, S.L.U. United Kingdom SMA Solar UK Ltd.
Portugal Barcelona Milton Keynes
+34 935 63 50 99 +44 1908 304899
SMA Online Service Center: SMA Online Service Center:
www.SMA-Service.com www.SMA-Service.com
Italia SMA Italia S.r.l. Bulgaria SMA Service Partner Renovatio Solar
Milano România +40 372 756 599
+39 02 8934-7299 Slovenija SMA Online Service Center:
SMA Online Service Center: Hrvatska www.SMA-Service.com
www.SMA-Service.com

SMA Solar Technology AG 12 Contact
United Arab SMA Middle East LLC India SMA Solar India Pvt. Ltd.
Emirates Abu Dhabi Mumbai
+971 2234 6177 +91 22 61713888
SMA Online Service Center:
www.SMA-Service.com
SMA Solar (Thailand) Co., Ltd. 대한민국 SMA Technology Korea Co., Ltd.
서울
+66 2 670 6999 +82-2-520-2666
South Africa SMA Solar Technology South Africa Argentina SMA South America SPA
Pty Ltd. Brasil Santiago de Chile
Cape Town Chile +562 2820 2101
08600SUNNY (08600 78669) Perú
International: +27 (0)21 826 0600
SMA Online Service Center:
www.SMA-Service.com
Australia SMA Australia Pty Ltd. Other countries International SMA Service Line
Sydney Niestetal
Toll free for Australia: 1800 SMA AUS 00800 SMA SERVICE
(1800 762 287) (+800 762 7378423)
International: +61 2 9491 4200

www.SMA-Solar.com

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User Manual

ENGLISH FSC20-BA-en-21 | 100590-00.03 | Version 2.1

2 FSC20-BA-en-21 User Manual

5 Getting Started ............................................................................................................................. 21

User Manual FSC20-BA-en-21 3

6.9 Processing Status Messages ........................................................................................................................... 40

8 System Control ............................................................................................................................. 74

4 FSC20-BA-en-21 User Manual

8.5 Setting the Control of the Grid Feed-In .......................................................................................................... 101

User Manual FSC20-BA-en-21 5

1 Information on this Document

1.2 Target Group

1.3 Additional Information

Indicates a situation which, if not avoided, can result in property damage

Indicates a requirement for meeting a specific goal

A problem that might occur

6 FSC20-BA-en-21 User Manual

User Manual FSC20-BA-en-21 7

2.2 Safety Information

8 FSC20-BA-en-21 User Manual

Danger to life from electric shock due to live voltage

Damage to the inverters, gensets or loads due to unauthorized access

Property damage due to dust intrusion and moisture penetration

Destruction of gensets due to customer communication with the inverter

User Manual FSC20-BA-en-21 9

FUEL SAVE DATA ACQUISITION

SUNNY CENTRAL SMA PV INVERTER

Figure 1: Regulation principle of PV systems with Fuel Save Controller

The Fuel Save Controller performs the following tasks:

10 FSC20-BA-en-21 User Manual

User Manual FSC20-BA-en-21 11

3.3 Key Switch

3.4 Light Repeaters

12 FSC20-BA-en-21 User Manual

Operation Warning light Operating state Description

3.5 Type Label

Symbols on the Type Label

User Manual FSC20-BA-en-21 13

4.2 User Groups and User Rights

4.3 Requirements for a Secure System Password

14 FSC20-BA-en-21 User Manual

4.4 Design of the User Interface

Figure 3: User interface of the Fuel Save Controller (example)

Position Designation Explanation

User Manual FSC20-BA-en-21 15

Position Designation Explanation

4.5 Buttons in the header

Return Use this symbol to go back to the previous page.

16 FSC20-BA-en-21 User Manual

Symbol Designation Description

* To use this button you must be logged in as an Installer.

4.6 Home Page for User Group "User"

Figure 4: Home page for user group User (example)

User Manual FSC20-BA-en-21 17

4.7 Home Page for User Group "Installer"

Figure 5: Home page for user group Installer (example)

4.8 Configuration Wizard

18 FSC20-BA-en-21 User Manual

Figure 6: Home page of the configuration wizard (example)