1.Longer battery life – 6000 times life cycle @90%DOD, 5 times more than lead acid batteries2.Low self-discharge <3.5% per months3.Free of charge memory Model  LFPWall-2500 Battery Type LiFePO4 Battery(LFP) Battery Style Wall-mounted Nominal Voltage 51.2 V Nominal Capacity 50Ah Battery Weight 31kg Battery Size 538*365*196mm Nominal Energy 2.66kWh