Nominal DC Input Voltage: 48V Nominal Input Frequency: 50/60Hz Over-Load Protection(SMPS load): air switch protection Output Short Circuit Protection: air switch protection Overcurrent Protector (grid): 63A Nominal Input Voltage: 90-280Vac Input Voltage Range: Depends on battery type Low Line Re-connect AC Input Range: 90Vac±7V(Appliances) Low Line Disconnect: 100Vac±7V(Appliances)