... Vdc digital controlling rack mount pure sinewave 3KVa inverter,Inverter specifications ModelLI10L-RM-INV LI15L-RM-INV LI20L ... % THD with linear loadEfficiency>85%Crest ratio3:1ProtectionOverload>120% for 2 minutes, > 150% at 10 secondsShort CircuitIBattery low/ ... P&O/P voltage, O/P Frequency, battery, loadAlarmAlarmMains failure, battery low, overload, inverter faultMutemanualNoise< 45 dB (at 1 ...