Inverter With 1 Kwh Lithium Battery For 2 Hours Power Backup At 500 Watt Load . Inverter Rating : 1 Kva , Input 220 Vac , 50Hz . Input Voltage 12 Vdc , Charging Current 20A , O Utput 220 Vac 50Hz Make-Microtek/Luminous/V-Guard [ Warranty Period: 30 Months After The Date Of Delivery ] ]