... rack mount pure sinewave 1-3KVa inverter,19inch series are in accordance with international standard 48 ... Optional)I/P & O/P Voltage, / O/P Frequency, Load, Battery Voltage, TemperatureDigitalI/P&O/P voltage, O ... /P Frequency, battery, loadAlarmAlarmMains failure, battery low, overload, inverter ... 460 x 133 1kva/2kva/3kva high frequency 48VDC Inverter