5.1 kWh Battery Module for GoodWe ESA 3-10K Inverters

The GoodWe GW5.1-BAT-D-G20 battery module is a high-voltage energy storage solution designed for GoodWe ESA 3-10K hybrid systems. It offers a nominal capacity of 5.12 kWh and 5 kWh of usable energy, uses LFP (LiFePO4) cells, and makes it possible to store surplus energy generated by a photovoltaic system for later use, increasing self-consumption and reducing dependence on the power grid.

With a maximum charge and discharge power of 5 kW, CAN communication, IP66 protection, and an expandable modular design, the GW5.1-BAT-D-G20 is intended for residential storage systems adapted to different energy needs. It can be installed on the floor or wall and combined with other compatible modules from the ESA platform.

5.12 kWh nominal capacity and 5 kWh usable

The GoodWe GW5.1-BAT-D-G20 provides a nominal energy of 5.12 kWh and a design usable energy of 5.0 kWh. This capacity makes it possible to store a significant amount of photovoltaic energy for use during nighttime hours, periods of low solar production, or when it is desirable to reduce consumption from the grid.

• Nominal energy: 5.12 kWh.
• Usable energy: 5.0 kWh.
• Battery type: LFP (LiFePO4).
• Application: residential energy storage.

GoodWe determines usable energy under specific laboratory conditions at the beginning of the battery’s service life. The energy actually available may vary depending on charge and discharge power, ambient temperature, state of charge, and storage and usage conditions.

LFP LiFePO4 technology

The module uses lithium iron phosphate or LiFePO4 cells, a technology widely used in stationary storage systems due to its thermal stability, long service life, and strong performance under frequent charge and discharge cycles.

This chemistry is especially suited to self-consumption installations where the battery must be charged during photovoltaic generation hours and then supply energy repeatedly afterward.

Up to 5 kW charge and discharge power

The GW5.1-BAT-D-G20 can operate with a maximum input power of 5 kW and a maximum output power of 5 kW. For short peak demands, the system can reach a peak output power of 7.5 kW for 10 seconds.

• Maximum charge power: 5 kW.
• Maximum discharge power: 5 kW.
• Maximum peak power: 7.5 kW for 10 seconds.
• Maximum input current: 12 A.
• Maximum output current: 13.2 A.

The maximum available power may be reduced depending on temperature and battery state of charge.

High-voltage battery for GoodWe ESA systems

In single-phase ESA series installations, the module operates within a working voltage range of 350 to 550 V. Communication with the inverter and battery management system is carried out via CAN.

• Voltage range in single-phase system: 350-550 V.
• Voltage range in compatible three-phase systems: 700-950 V.
• Communication: CAN.

The module is officially listed by GoodWe as compatible with ESA 3-10K inverters, including the GW3K-EHA-G20, GW3.6K-EHA-G20, GW5K-EHA-G20, GW6K-EHA-G20, GW8K-EHA-G20, and GW10K-EHA-G20 models.

Modular and expandable system

The GoodWe ESA architecture allows storage capacity to be expanded progressively by adding multiple battery modules. This makes it possible to start with a capacity suited to the home’s current consumption and later expand the system if energy needs increase.

GoodWe’s current documentation establishes a system scalability of up to 12 modules, although the maximum quantity depends on the installation method and battery distribution.

In the ESA 3-10K system, GoodWe sets the following limits:

• Floor installation: up to 12 modules in total, distributed across a maximum of 3 groups.
• Maximum per floor-standing column: 6 modules.
• Wall installation with GW5.1-BAT-D-G20/G21 modules only: up to 9 modules in total, with a maximum of 3 modules per group.
• Wall installation with combinations of 5.1 and 8.3 kWh modules: up to 6 modules in total, with a maximum of 2 per group.

Possibility of combining different capacities

GoodWe allows, within certain configurations, the combination of battery modules with different capacities from the ESA platform, including 5.12 and 8.32 kWh models. This flexibility makes it easier to adapt the total system capacity to the specific needs of each installation.

The combination of different models must be carried out in compliance with the mounting rules, maximum number of modules, operating temperatures, and compatible versions indicated in the manufacturer’s current manual.

IP66 protection

The GoodWe GW5.1-BAT-D-G20 has an IP66 protection rating, providing high resistance against dust and water ingress.

This feature offers greater flexibility when choosing its location, although installation must always comply with the distances, environmental conditions, and mounting requirements established by GoodWe.

Integrated heating for low-temperature operation

The GW5.1-BAT-D-G20 version incorporates a heating system to support battery operation at low temperatures. The current GoodWe technical documentation specifies a charging range from -18 °C to +55 °C.

• Charging temperature: -18 °C to +55 °C.
• Discharging temperature: -20 °C to +55 °C.
• Heating: integrated according to the current EMEA datasheet.

This feature expands installation possibilities in areas where temperatures can drop significantly during the winter months.

Aerosol fire suppression system

The current GoodWe technical documentation also specifies an integrated aerosol fire suppression system in this battery module.

This solution is part of the safety measures of the Lynx D G2-based architecture and is intended to provide additional protection against certain abnormal thermal situations inside the module.

CAN communication with the management system

The GW5.1-BAT-D-G20 uses CAN communication to exchange information with the inverter and BMS system. Through this connection, data related to state of charge, current, voltage, temperature, and battery operating conditions are transmitted.

This electronic management allows the inverter to automatically adjust charging and discharging according to the actual conditions of the storage system.

Quiet operation

GoodWe declares a sound emission of 29 dB or less, so the module can be integrated into residential installations where a low acoustic level is desired.

• Sound level: ≤29 dB.

Floor or wall installation

The modular design allows the GW5.1-BAT-D-G20 to be installed both stacked on the floor and wall-mounted. The final configuration depends on the number of modules and the accessories used.

The common ESA module format makes it possible to create visually integrated sets with the inverter and other batteries in the same system.

• Width: 800 mm.
• Height: 326 mm.
• Depth: 270 mm.
• Weight: 57.5 ±1 kg.
• Installation: floor or wall.

Environmental conditions

The module is designed to operate across a wide range of environmental conditions:

• Charging temperature: -18 °C to +55 °C.
• Discharging temperature: -20 °C to +55 °C.
• Relative humidity: up to 100% according to the current datasheet.
• Maximum operating altitude: 4,000 m.
• Protection rating: IP66.

Storage conditions

GoodWe also sets limits for long-term storage of the module when it remains out of service:

• Up to 12 months: between -20 °C and +35 °C.
• Up to 6 months: between +35 °C and +45 °C.

During prolonged periods without operation, the manufacturer’s instructions regarding battery state of charge and maintenance must also be followed.

Cycle life

The current GoodWe EMEA datasheet states a service life of 8,000 cycles or more for the GW5.1-BAT-D-G20 under specific laboratory conditions.

The actual battery lifespan depends on factors such as depth of discharge, charge and discharge power, temperature, state of charge, and usage conditions. The cycle figures published by GoodWe may vary between documents when different test criteria are applied.

Standards and certifications

The module is developed in accordance with different international standards applicable to storage systems and lithium batteries:

• IEC 62619.
• IEC 60730.
• EN 62477.
• IEC 63056.
• IEC 62040.
• CE.
• CEC.
• VDE 2510.
• UN38.3 for transport.
• ADR.

Technical features of the GoodWe GW5.1-BAT-D-G20

• Brand: GoodWe.
• Model: GW5.1-BAT-D-G20.
• Type: high-voltage battery module.
• Main compatibility: GoodWe ESA 3-10K systems.
• Technology: LFP (LiFePO4).
• Nominal energy: 5.12 kWh.
• Usable energy: 5.0 kWh.
• Voltage range in single-phase system: 350-550 V.
• Maximum input current: 12 A.
• Maximum output current: 13.2 A.
• Maximum input power: 5 kW.
• Maximum output power: 5 kW.
• Maximum peak power: 7.5 kW for 10 seconds.
• Communication: CAN.
• Declared service life in current datasheet: ≥8,000 cycles under specific laboratory conditions.
• System scalability: up to 12 modules depending on configuration.
• Maximum in a single floor-standing column: 6 modules.
• Heating: integrated.
• Aerosol fire suppression: integrated.
• Protection rating: IP66.
• Charging temperature: -18 °C to +55 °C.
• Discharging temperature: -20 °C to +55 °C.
• Maximum altitude: 4,000 m.
• Sound emission: ≤29 dB.
• Dimensions (width x height x depth): 800 x 326 x 270 mm.
• Weight: 57.5 ±1 kg.
• Mounting: floor or wall.

Modular storage for the GoodWe ESA 3-10K system

The GoodWe GW5.1-BAT-D-G20 5.1 kWh is a solution especially suited to residential self-consumption installations that need modular energy storage. Its 5 kWh usable energy, LFP technology, up to 5 kW charge and discharge power, IP66 protection, and CAN communication allow it to be directly integrated into the architecture of compatible GoodWe ESA inverters.

The ability to expand the system with multiple modules makes it possible to adapt storage capacity to each home’s consumption profile, while the integrated heating, aerosol fire suppression system, and low-temperature operation provide versatility and safety to the installation.

Important: the maximum number of modules and permitted arrangement depend on whether the installation is floor-mounted or wall-mounted and on the combination of models used. The final configuration must always follow the current GoodWe manual for the ESA 3-10K system.