Genuine Ziewnic lithium battery, Li-Wall V2 – 51.2V, built with LiFePO4 cells for solar energy storage. Key specs: Battery Type: LiFePO4. Normal Battery Voltage (VDC): 51.2V. Normal Capacity (25C, 0.2C) (WH): 5120WH. Voltage Window (VDC): 44.8~58.4V. Solar Charge Voltage (VDC): 56.2V. Max. Continue Discharge Current (A): 100.