ZeroFeedIn PL en 11
ZeroFeedIn PL en 11
ZeroFeedIn PL en 11
Table of Contents
1 Introduction .............................................................................. 3
2 Solution 1: Direct Self-consumption with Zero Export .......... 5
2.1 System Configuration................................................................................................. 5
2.2 System Requirements for Zero Export ....................................................................... 6
1 Introduction
Zero-export systems are systems that consist of power generation units and, if applicable, battery-
storage systems. Such systems are not designed for feeding into the utility grid and they actively
prevent this. The zero-export system from SMA maximizes self-consumption and uses 100% of the
self-generated solar power. Our system lets customers expand the solar energy without high
additional investments in the utility grids. This is necessary if the grid operator does not allow grid
feed-in because of a weak infrastructure and possible overload, for example.
SMA offers a variety of solutions especially for PV systems that are no longer allowed or intended
to feed solar power into the grid due to restrictions imposed by the grid operator:
• Solution 1: Direct self-consumption with zero export
An intelligent PV inverter is installed in the system. This inverter is configured for zero export
and dynamically limits the power if it cannot be consumed in the household at the same time it
is generated. Direct self-consumption can cover 30% to 40% of power consumption in a
typical household.
• Solution 2: Self-consumption with a battery-storage system and zero export
This system is equipped with a storage system so that a larger proportion of the consumed
power can be covered by electric current from the customer's own PV system. It also requires
an intelligent PV inverter that can regulate the power. 1 Sunny Island 4.4M / 6.0H / 8.0H or
1 Sunny Boy Storage 2.5 / 3.7 / 5.0 / 6.0 can be installed as the battery inverter. As an
alternative to an intelligent PV inverter and an additional battery inverter, an intelligent hybrid
inverter may be used. In a typical household, the proportion of self-generated solar power
after installing such a storage system is 50% to 70%.
• Solution 3: Retrofit a battery-storage system for self-consumption with zero export in
existing PV systems
If a PV inverter from another manufacturer is installed in the existing system or the existing
inverter cannot be regulated, the system can be upgraded to a zero-export system by adding
a storage system. Any PV inverter can be used in the system in combination with a compatible
lithium-ion battery. 1 Sunny Island 4.4M / 6.0H / 8.0H must be installed as the battery
inverter. The proportion of self-generated energy in the power consumption is 50% to 70%.
SMA PV inverter Storage system Additional components
solu-
tion
Solution The inverter must be able - Components for intelligent
1 to regulate the power. energy management
Optional upgrade by
adding components for
charging electric vehicles
If the inverter of your PV system cannot regulate the power, it must be replaced with a new inverter.
Alternatively, you can upgrade your PV system by adding a Sunny Island (see Section 4,
page 10).
The SMA inverters listed below can regulate the power within the allowed time:
• Sunny Boy 3.0 / 3.6 / 4.0 / 5.0 (SB3.0-1AV-40 / SB3.6-1AV-40 / SB4.0-1AV-40 /
SB5.0-1AV-40)
• Sunny Boy 3.0 / 3.6 / 4.0 / 5.0 / 6.0 (SB3.0-1AV-41 / SB3.6-1AV-41 / SB4.0-1AV-41 /
SB5.0-1AV-41 / SB6.0-1AV-41)
• Sunny Boy 1.5 / 2.0 / 2.5 (SB1.5-1VL-40 / SB2.0-1VL-40 / SB2.5-1VL-40)
• Sunny Tripower 3.0 / 4.0 / 5.0 / 6.0 / 8.0 / 10 (STP3.0-3AV-40 / STP4.0-3AV-40 /
STP5.0-3AV-40 / STP6.0-3AV-40 / STP8.0-3AV-40 / STP10.0-3AV-40)
• Sunny Tripower X 12 / 15 / 20 / 25 (STP12-50 / STP15-50 / STP20-50 / STP25-50)
UTILITY METER
CONTROLLABLE FOR BILLING
PV MODULES LOADS INTERNET PURPOSES
SMA
BATTERY EV CHARGER
Backup
DC AC current AC
COM Speedwire Radio
Figure 3: Design of the PV system: solution 2 with hybrid inverter and optional PV inverters
The SMA inverters listed below meet the requirements of Solution 2 and do not need to be
replaced:
PV inverter Battery inverter Hybrid inverter
Sunny Boy (SB) Sunny Boy Storage (SBS) Sunny Tripower Smart
Energy (STP SE)
SB3.0-1AV-40 SBS2.5-1VL-10 STP5.0-3SE-40
SB3.6-1AV-40 SBS3.7-10 STP6.0-3SE-40
SB4.0-1AV-40 SBS5.0-10 STP8.0-3SE-40
SB5.0-1AV-40 SBS6.0-10 STP10.0-3SE-40
SB3.0-1AV-41 Sunny Island (SI)
SB3.6-1AV-41 SI4.4M-12
SB4.0-1AV-41 SI6.0H-12
SB5.0-1AV-41 SI8.0H-12
SB6.0-1AV-41 SI4.4M-13
SB1.5-1VL-40 SI6.0H-13
SB2.0-1VL-40 SI8.0H-13
SB2.5-1VL-40
Sunny Tripower (STP)
The SMA battery inverters listed below can be used in a storage system:
• Sunny Island 4.4M / 6.0H / 8.0H (SI4.4M-12 / SI6.0H-12 / SI8.0H-12)
• Sunny Island 4.4M / 6.0H / 8.0H (SI4.4M-13 / SI6.0H-13 / SI8.0H-13)
Only compatible lithium-ion batteries are suitable for this use case (see “TI Batteries in Sunny Island
Systems – List of Approved Batteries” at www.SMA-Solar.com). Lead batteries are not suitable for
this use case.
SUNNY PORTAL
DISTRIBUTION BOARD
Contactor
SMA
ROUTER ENERGY METER
PROTECTIVE DEVICE
max. 40 A
SUNNY HOME
MANAGER 2.0
UTILITY GRID Grid-connection
point with energy
meter of the electric
utility company Existing protective devices
TN or TT system
F1
F2
F3
AC2 L N N PE AC1 L N PE
RADIO-
TT
CONTROLLED
At connection AC2, NC Relay 1
Relay 2 NOC SOCKET
C
always connect the N ExtVtg +
DigIn _
neutral conductor to NTT. L
_
Inventory ComETH BatVtgOut
+
Radio ComSyncIn ComSyncOut
DC+ cable _
BatTmp DC +
DC– cable
Line conductor
NON-
CONTROLLABLE CONTROLLABLE
Lithium-ion battery
☐ The contactor must be connected to the relay 1 and relay 2 connections in Sunny Island. The
contacts C and NC as well as C and NO are used in series connection. For information on
cable requirements and the installation procedure for the Sunny Island, refer to the
Sunny Island operating manual in the download area of our homepage at www.SMA-
Solar.com.
Adjusting the Parameters via the User Interface of the Battery Inverter
Adjusting the Parameters of the Switching Limits
The following parameters in the parameter group Device > Load shedding 1 in the Sunny Island
must be adjusted via the user interface so that the Sunny Island can control the PV inverter reliably.
• Disconnection of the PV inverter: For relay 1 Battery state of charge threshold for stop
load shedding 1: 85% of the SOC
• Connection of the PV inverter: For relay 1 Battery state of charge threshold for start load
shedding 1: 75% of the SOC
• Relay 2 is closed when Sunny Island is in operation.
• Relay 2 is opened when the Sunny Island is switched off, set to stop, or displays a fault.
Procedure:
1. Log in to Sunny Portal and call up the desired system.
2. In the menu Configuration > System properties > Parameters, select the button [Edit].
3. In the Limiting of the active power feed-in field, select the subitem Max. ## % of the
nominal PV system power and enter 0.
4. If a battery inverter is present in the system: activate Including the battery inverter.
5. Click on [Save].
6. Log in to the user interface of the battery inverter as Installer.
7. Select User Settings > SMA Grid Guard Login and enter the SMA Grid Guard code.
8. Call up the menu Device parameters.
9. Click on [Edit parameters].
10. Set the parameter Operating mode active power setting to External setting in the
parameter group System and device control > Inverter > Active power mode.
11. Click on [Save all].