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WELI Product



Additional information

Model Name


Rated Voltage


Rated Capacity @0.2C

400Ah / 20.48kWh

Standard Discharge Current


Max. Discharge Current



L650 * D550 * H160mm

Net Weight



51.2V400AH LiFePO4 Battery

For Energy Storage System



Battery Module Parameter

No. Item Specification Note
1 Nominal Voltage 51.2V
2 Typical Capacity 400Ah / 20.48kWh At 0.2C Rate
3 Inner Resistance ≤100mΩ At AC 1kHz
4 Charging Voltage 58.4V 3.65V / Cell
5 Standard Charge Current 50A
6 Max. Charge Current 100A
7 Discharge Cut-Of Voltage 44.8V 2.8V / Cell
8 Standard Discharge Current 50A
9 Max. Discharge Current 100A
10 Peak Discharge Current 120A/3S
11 Outline Dimension L650 × D550 × H160mm One Battery Module
12 Pack Method 16S1P*4 Stack 4 Groups
13 Cell Type LFP 3.2V 100Ah
14 Main Shell Material SPCC
15 IP Class IP50
16 Net Weight 50KG One Battery Module
17 Cooling method Natural Cooling
18 Operation Temperature Range Charge: 0℃~45℃ 10%-90%RH
Discharge: -20℃~60℃
19 Storage Temperature Range 15℃~25℃: 9 Months 50%~60% SOC
0℃~35℃: 6 Months
-20℃~45℃: 1 Month
20 Storage Humidity 10%-90%RH


  • Back View Diagram
No. Marking Description Remarks
1 P+ Positive Port
2 RST Reset Button
3 ADS DIP Switch
4 CAN/RS485-2 Inverter Communication Interface
5 RS232 PC Communication Interface
6 RS485-1 Battery Parallel Communication Interface
7 P- Negative Port


  • Finished Dimension Drawing
Final Dimension Length: 650 mm Depth: 550 mm Height: 760 mm
Finished Weight Approx. 220KG


  • Parallel Wiring Diagram


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Please pay attention to the email with the suffix “@welicharger.com”.