GoodWe
ESA Series Battery Module
Model range: GW5.1-BAT-D-G20 / GW8.3-BAT-D-G20 / GW5.1-BAT-D-G21 / GW8.3-BAT-D-G21
4 pack sizes
GoodWe ESA Series battery modules (5.12–8.32 kWh rated) across G20/G21 variants.
At a glance
Best for
Properties wanting more evening usage coverage and backup planning
Standout
Battery size is around 5–8, which helps frame evening coverage expectations.
Watch out for
Battery value depends heavily on your current bill, evening usage, and tariff settings.
Key specifications
A quick snapshot of the family. Compare module counts and capacity in the table below.
Dimensions
W 800 mm · D 326 mm
Usable battery size
5–8
This is closer to the energy you can actually use day to day.
Battery size
5.12–8.32
A bigger battery can usually cover more evening and overnight usage.
Battery chemistry
LFP
LFP batteries are widely used for stability and long cycle life.
Ip Rating
IP66
Compare pack sizes
Capacity, voltage, and power rise as you stack more modules. Specs that stay the same on every size are listed underneath.
Numbers that change with size.
Swipe for more sizes
| Spec | GW5.1-BAT-D-G20 | GW8.3-BAT-D-G20 | GW5.1-BAT-D-G21 | GW8.3-BAT-D-G21 |
|---|---|---|---|---|
| Rated EnergykWh | 5.12 | 8.32 | 5.12 | 8.32 |
| Usable EnergykWh | 5 | 8 | 5 | 8 |
| Max. Input Current (System)A | 12 | 19 | 12 | 19 |
| Max. Output Current (System)A | 13.2 | 21.0 | 13.2 | 21.0 |
| Max. Input Power (System)kW | 5 | 8 | 5 | 8 |
| Max. Output Power (System)kW | 5 | 8 | 5 | 8 |
| Peak.Output Power (System)kW | 7.5 @ 10s | 12 @ 10s | 7.5 @ 10s | 12 @ 10s |
| Charging Temperature Range°C | -18 ~ +55 | -18 ~ +55 | +2 ~ +55 | +2 ~ +55 |
| Weightkg | 57.5 ± 1 | 79.0 ± 1 | 57.5 ± 1 | 79.0 ± 1 |
| Optional Function Configuration | Heating | Heating | - | - |
The same on every size
- Battery Type
- LFP (LiFePO4)
- Nominal System Voltage
- Charge: 420; Discharge: 380 V
- Operating Voltage Range (single phase system)
- 350 ~ 550 V
- Operating Voltage Range (three phase system)
- 700 ~ 950 V
- Discharging Temperature Range
- -20 ~ +55 °C
- Relative Humidity
- 5 - 95 %
- Max. Operating Altitude
- 4000 m
- Noise Emission
- <29 dB
- Communication
- CAN
- Dimensions (W x H x D)
- 800 x 326 x 270 mm
- Ingress Protection
- IP66
- Max. Storage time
- 12 months (-20°C ~ +35°C); 6 months (+35°C ~ +45°C)
- Scalability
- 6 pcs
- Mounting Method
- Floor stacked / Wall-mounted
- Country of Manufacture
- China
- Safety Standard and Certification
- Safety: IEC62619, IEC60730, EN62477, IEC63056, IEC62040, CE, CEC; EMC: CE, RCM; Transportation: UN38.3, ADR