... AC Inverter 4,CE Certification 220V Pure Sine Wave Inverter, Off-grid inverter SPV5000 pure sine wave power inverter ,off-grid inverter,off ... rated DC voltage12V, 24V, 36V, 48V, 72V, 110V, 220VEmergency holding timeDepend on battery capacity and load power. The calculation ... 70η Discharge current (A)Output frequency50Hz, 60HzUnder-voltage protectionSingle 12V battery is 9.5~10.5V (Other voltage is ...