... AC Frequency exceed 46~54Hz)50±0.2%Hz(Battery Mode)Output WaveformTrue Sine WaveHarmonics Distortion<3% (Linear ... 4msTotal Efficiency≥90%IndicatorsLCDVFD/LCD Indicator StatusInput/Output Voltage,Frequency,Output Power,Battery,Utility,Inverter,Overload,Fault,BypassCommunication PortRs232/ ... UPS Statu Indicator etc.Software Function1.Anlysis of Power Status, 2.Timing Controlling, 3.Monitor UPS,4.Execute ...