Model GXK-1500-C Capacity 1500VA / 900W UPS Type Line Interactive Battery Waveform Simulated Sinewave Control Microprocessor-controlled with self-diagnostic technology AVR Boost and Buck Cold Start Yes Auto Restart Yes when AC recovers Input Voltage 220/230/240Vac Voltage Range 140–300Vac Frequency Range 50/60Hz auto sensing Output AC Voltage Regulation ±10% in battery mode Frequency 50/60Hz ±1Hz in battery mode Transfer Time 4–8ms Battery 24Vdc Type 12V 9Ah × 2 Recharge Time 6–8 hours to 90% capacity Indicators LED and LCD for AC/Battery/Load/Battery Level/Fault Protection Short circuit, Overload, Overcharge, Overdischarge Alarm Battery mode, Low battery, Overload, Battery replacement, Fault