... Inverter and Charger HBC-P500VA,1KVA,1.5KVA,2KVA,3KVA,4KVA,5KVA,7.5KVA,10KVAParameters:Output voltage: 220V±10% or 110V automatic ... stabilized voltageCharging input voltage: 220V±10%Output frequency: 50Hz±2% automatic stabilized ... sine waveEfficiency: ≥0.7should use with battery . modified sine wave HBC-P type Inverter and Charger