ESSW - BATTERY ENERGY

STORAGE SYSTEM
Energy available and under control,
from generation to consumption

Motors | Automation | Energy | Transmission & Distribution | Coatings

 www.weg.net

ENERGY AVAILABLE AND UNDER CONTROL

FROM GENERATION TO CONSUMPTION
The ESSW product line is a complete electrical energy storage and management system that
can be configured to perform numerous functions – from reducing the intermittency of renewable
generation sources to performing ancillary services in power substations.

The system consists of an energy control and management solution which coordinates the
operating modes and optimizes their performance, ensuring higher efficiency and better use of energy
resources, in addition to providing operational flexibility and energy supply reliability.

Advantages
J Modular and customizable system J High energy density
J Parallel operation with different power sources J Integration with renewable generation sources
J On-grid and off-grid operation J High storage capacity
J Remote monitoring and control J High charging and discharging capacity
J Complete energy management J Extended service life
J Real-time operation setting J Low maintenance
J No pollution generation J High safety level
J Easily integrated with existing electrical systems

2 ESSW - Battery Energy Storage System

 www.weg.net

Why Energy Storage?

Battery Energy storage systems are capable of intensively exploiting energy resources, playing an important role in the unification,
distribution and capacity expansion of distributed generation systems. This technology allows disseminating the use of solar, wind
and other renewable energy sources in a sustainable manner, overcoming the problems of random energy availability and increasing
the efficiency of the system as a whole, in addition to contributing to the reduction of environmental impacts.

The ESSW line stands out for being a solution fully developed to meet the specific demand of each project.

Operating Modes

Power factor Peak Voltage and Spinning Load Leveling

regulation shaving frequency regulation reserve

Time Shifting Power Energy Black Start

stabilization management

Note: the operating modes for each system will be defined according to the specific needs of each application.

ESSW - Battery Energy Storage System 3

 www.weg.net

Main Components
The ESSW is a modular, scalable solution that can be configured for different applications. The components are individually
designed and manufactured to meet the specific demands of each installation.

� Special E-house for BESS; � DC switchboards;

� Bidirectional converter; � AC switchboards;
� Battery bank; � HVAC and fire control system;
� Power transformer; J Energy Management System (EMS).

The main components are the battery pack and the bidirectional converter.

Batteries
The high efficiency of the ESSW energy storage system is guaranteed by the advanced battery technology and the
integrated BMS. The lithium battery has a reduced environmental impact combined with excellent performance and safety.
The ideal battery bank for the project is defined according to the type of application, storage capacity, charging/discharging
capacity, service life, etc. Lithium batteries are used because they provide several advantages in relation to the other
topologies used worldwide – among them, high energy density, extended useful life, high charging and discharging
capacity, modularity and low maintenance.

The figure below shows the modularity of these batteries; the cells are enclosed in modules and mounted on racks. Each rack
has its energy measurement, control and management unit (BMS).

Cell

Module Rack Battery Bank

Advantages

� Modular
 structure ensuring easy operation and � High
 reliability and safety provided by the chemistry used;
maintenance; � Long service life;
� Flexible
 arrangement for various voltage levels and storage � Optimized
 dimensions ensuring high energy density and
capacities; reduced weight;
� Design
 of the battery management system (BMS) in three � Flexible and fast transportation and implementation;
levels (module, rack and bank), ensuring greater control and � Lower
 maintenance in comparison to other battery
monitoring of the system; chemistries.

4 ESSW - Battery Energy Storage System

 www.weg.net

Bidirectional Converter
WEG converters combine bidirectional modular inverters with automation, control and thermal management systems, and AC
and DC interconnections in a single integrated, flexible and scalable device. Designed specifically for use in energy storage
systems, they simplify the integration and installation, reducing operation and maintenance costs. The converters used in the
ESSW were developed to offer excellent cost effectiveness combined with a long service life. The converters are defined
according to the power, voltage and current level, dimensions, monitoring characteristics, energy control and modularity.

J Three-phase 380 V ac J Three-phase 320 to 550 V ac

J Power from 50 to 300 kVA J Power from 0.5 to 2.0 MW
J High power factor (>0.99) J Manageable via Modbus
J Manageable via Modbus J Reactive power compensation
J Complete HMI J Operation with all battery types
J Operation with all battery types J Integrated circuit breakers and cooling
J Reactive compensation J On-grid and off-grid operation
J On-grid and off-grid operation J Modular with quick maintenance
J Seamless transactions

Advantages

� Compact, efficient, flexible, configurable and scalable; � Control

 technology options offer simplified stabilization to
� Integrated and highly efficient cooling system; the system (on-grid), with the possibility of including black
� Bus connections for integrated AC and DC coupling start, islanding and re-synchronization with the network;
reduce the overall installation cost; � Interface
 to comply with the main network standards,
� Converter control with dynamic stability model that including resources for reactive power compensation
complies with the main international standards; (VAR), frequency response, voltage regulation and
operation during periods of low and high voltage.

ESSW - Battery Energy Storage System 5

 www.weg.net

E-house
The ELW E-Houses are an integrated solution designed and manufactured to order, meeting each customer's specific needs.
Assembled on a single platform, they integrate the battery system, converter, DC and AC switchboards, transformer, automation
system and auxiliary equipment, being delivered assembled, interconnected and tested at the factory. They represent a
customized solution, eliminating the need for masonry works and different suppliers. In addition, since there are no size
limitations, they can be used in small and large installations, in many different (even aggressive) environments and industrial
activities.

Advantages

J Shorter lead time to execute the projects

J Shorter assembly time in the field
J Small construction site infrastructure required (lower cost of mobilization and demobilization)
J Factory assembly and field installation are not affected by weather conditions
J Single engineering to integrate all devices and systems
J Reduction in the storage area and in the works in the field
J Better process control and quality systems
J Reduction of engineering, project management and supply costs (optimization of the procurement process)
J Logistics gain in the manufacturing, platform testing, start-up and commissioning
J Shorter lead time

6 ESSW - Battery Energy Storage System

 www.weg.net

Transformer
Designed to meet to the demand for transformers that
provide greater safety, space saving, simple
maintenance and lower installation and maintenance
costs, transformers insulated with epoxy are the best
choice. This product line offers solutions for all kinds of
environments. The vacuum encapsulation process and
the quality of the resin prevent partial discharges and
significantly increase the transformer service life. They
are available in powers from 112.5 to 20,000 kVA, in
voltage classes up to 36.2 kV, with protection rating up
to IP55.

Advantages

J  sual powers of 112.5, 150, 225, 300, 500, 750,

U
1,000, 1,500, 2,000, 2,500, 3,000, 5,000, 7,500,
10,000, 12,500, 15,000 and 20,000 kVA, in classes
up to 36.2 kV;
J Manufactured according to ABNT (Brazilian
Association of Technical Standards) or IEC –
International Electric Code;
J High voltage encapsulated in epoxy resin suitable for
thermal demands up to 200 °C;
J Available in all IP protection ratings established by
national and international standards;
J Ecologically correct, since they do not have insulating
fluids with potential environmental impact or emission
of toxic gases;
J Greater safety, as the resin used has self-extinguishing properties;
J No need for special civil works, such as fire stop walls or oil containment basins;
J Simplified protection system;
J Reduction of the installation insurance costs;
J Low installation costs, reducing investment in cabling, since they can be installed close to the load centers, and no
containment tanks are required.

ESSW - Battery Energy Storage System 7

 www.weg.net

Automation and Monitoring System

The Automation System is composed of:

EMS

The EMS (Energy Management System), by means of an industrial PLC (programming based on IEC 61131-3) and an industrial
communication network, manages the operation and control of the distribution system and must allow the control of variables
of interest of the storage system and the monitoring of electrical quantities, operational status and alarms of the entire system
(PCS, BMS, renewable sources, generator, etc.).
The EMS has a local access platform (SCADA + HMI) with a real-time status monitor, which allows viewing monitoring data,
alarms, reports, and charging and discharging curves, sending control commands, changing operating modes, among others.
It is also possible to access this system through a remote platform (online access).

PCS

The PCS (Power Converter System) is the interface between the DC link of the batteries and the AC busbar of the inverter. In
addition, the PCS monitors electrical variables, alarms of interest and is fully integrated with the operation, control and energy
management (EMS) system.

BMS + Batteries

The BMS (Battery Management System) manages the bank of rechargeable batteries, preventing the pack from operating
outside its safe operating range, monitoring its status, calculating secondary data and informing such data to the EMS and
PCS.

EMS

HMI

PLC

PCS

Auxiliary
PCS Metering
Systems

BMS

BMS Batteries

8 ESSW - Battery Energy Storage System

 www.weg.net

Connection Points
Conventional Centralized
Geração Centralizada
GenerationConvencional Microgrids
Microgrids

Termoelétricas
Thermoelectric Smart
Smartcities
cities
ESS
ESS EVSE
EVSE

Hydroelectric
Hidroelétricas

Transmission
Transmissão e and Distribution
Distribuição Distributed Generation
Geração Distribuída

ESS
ESS ESS

ESS
ESS

ESS
ESS

Wind
Eólica
Industries
Indústrias

Substation
Subestação Transmission
Transmissão Substation
Subestação

Solar
Solar Offgrid
SistemasSystems
Off-Grid
Geradores
Generators
Isolatedisoladas
Cargas loads ESS
ESS

ESS
ESS ESS
ESS

Sistemas de Generation
Intermittent Geração Intermitente
Systems

ESSW - Battery Energy Storage System 9

 www.weg.net www.weg.net

Layout Example

DC Switchboard
Transformer Converter System (PCS)
HVAC
EMS
AC Switchboard Battery Bank
Heat Exchanger

12,192

2,438
10 ESSW - Battery Energy Storage System ESSW - Battery Energy Storage System 11
 www.weg.net

Main Applications

Power Generation

For use in parallel with intermittent generation sources (wind and solar)
J Voltage regulation; J Power stabilization;

J Frequency regulation; J Reliability in power supply.

Transmission and Distribution (Utility)

J Reduction in peak demand; J Elimination of network overloads;

J Postponement of investments; J Load balancing.

Industry Commercial and Industrial (C&I)

J Microgrids and isolated systems; J Energy backup; J  ransportation sector (in parallel with
T
J Reduction in consumption; J Response to passive demand; electric vehicle charging stations).
J Distributed storage; J Energy management;

12 ESSW - Battery Energy Storage System

 www.weg.net

Technical Data
Converter
ECBID FP2000
Model
50 100 150 200 250 300 Single Dual
AC connection
Number of phases Three-phase
Rated voltage (V) 380 380 400 480 550 380 400 480 550
Rated power (kW) 50 100 150 200 250 300 620 650 775 900 1,240 1,300 1,550 1,800
Rated frequency (Hz) 50 or 60
Power factor correction 0.6 - 1 0.1 - 1
Output current distortion (%) <3
DC connection
Rated voltage (V dc) 720 675 720 840 980 675 720 840 980
Maximum input voltage (V dc) 900 1,150
Minimum input voltage (V dc) 600 580 600 720 825 580 600 720 825
Maximum charging current (A) 83 167 166 330 415 500 1,250 2,500
Maximum discharging current (A) 85 170 170 340 427 515 1,250 2,500
Communication
Communication interface RS485 Serial Modbus, dry contact Modbus TCP/IP, DNP3
Mechanical data
Protection rating IP20 IP54 (indoor) / IP55 (outdoor)
Dimensions (H x W x D) (mm) 1,603.5 x 606 x 630 1,800 x 800 x 837 2,229 x 2,882 x 977 (indoor) / 2,241 x 3,745 x 977 (outdoor)
Weight (kg) 200 200 220 460 480 510 2,900 3,650
Operating temperature (°C) 0 to +55 -25 to +50
Maximum altitude (m) <1,000
Cooling Forced ventilation Liquid - Integrated
Efficiency (%) 97.5 98.1 98.2 98.3 98.4 98.1 98.2 98.3 98.4

Battery Bank
Chemistry Lithium ion: (LFP) Iron phosphate
Rated bank capacity From 215 kWh
Depth of discharge Batteries can be cycled from 0 to 100% (full DOD)
Rated power 0.5C to 1C
Management Integrated BMS
Estimated service life Above 6,000 cycles (@25 °C, 0.5C/0.5C, 100% DOD, 80% RET)
Installation Racks

Characteristics of the Cell

Cell capacity (Ah/Wh) 280/896
Minimum/rated/maximum voltage (V) 2.5/3.2/3.65
Dimensions (H x W x D) (mm) 174 x 71.7 x 207
Weight (kg) 5.34
Discharging/charging rate (C) 0.5 (standard) and 1 (opcional)

Characteristics of the Module

Number of cells per module 20
Module capacity (Ah/kWh) 280/17.92
Rated/minimum/maximum voltage (V) 56/64/72
Dimensions (H x W x D) (mm) 516 x 950 x 234
Weight (kg) 140
Cooling system Forced ventilation

Notes: The number of modules per rack and the number of racks per bank are defined according to the voltage levels of the converter and the final storage
capacity of the project.
The converter and battery bank used may change to meet the project requirements.
Example Battery Configuration - other configurations including NMC lithium chemistries are available.
Also available in customized versions (on request).

ESSW - Battery Energy Storage System 13

 www.weg.net

Technical Data
Other Characteristics
E-house 20’
E-house 40’
Structure
Special E-house
Masonry structure
Structural base Included
Fire detection and extinguishing system Included
Lightning protection system Included
HVAC Included
Lighting and emergency system Included
Grounding system Included
Transformer Included
DC connection panel Included
EMS (Energy Management System) Included
UPS Included
Protection system Included (chemical, electrical, mechanical, thermal and environmental protection)

14 ESSW - Battery Energy Storage System

 www.weg.net

Global presence is essential,

as much as understanding your needs.

Global Presence
With more than 30.000 employees worldwide, WEG is one of the largest electric motors, electronic equipments and systems
manufacturers. We are constantly expanding our portfolio of products and services with expertise and market knowledge. We
create integrated and customized solutions ranging from innovative products to complete after-sales service.

WEG’s know-how guarantees our ESSW - Battery Energy Storage System is the right choice for your application and
business, assuring safety, efficiency and reliability.

Availability is to have a global support network

Partnership is to create solutions that suit your needs

Competitive edge is to unite technology and innovation

Know More
High performance and reliable
products to improve your
production process.

Excelence is to provide a whole solution in

industrial automation that improves
our customers productivity.

Visit: www.weg.net youtube.com/wegvideos

ESSW - Battery Energy Storage System 15

 For WEG’s worldwide
operations visit our website

www.weg.net

+55 47 3276.4000

automacao@weg.net

Jaraguá do Sul - SC - Brazil

AUTOMATION

Cod: 50100618 | Rev: 00 | Date (m/a): 06/2020.

The values shown are subject to change without prior notice.
The information contained is reference values.