... %Hz(AC Frequency exceed 46~54Hz)50±0.2%Hz(Battery Mode)Output WaveformTrue Sine WaveHarmonics Distortion<3% (Linear Load,Full Load ... Bypass< 4msTotal Efficiency≥90%IndicatorsLCDVFD/LCD Indicator StatusInput/Output Voltage,Frequency,Output Power,Battery,Utility,Inverter,Overload,Fault,BypassCommunication PortRs232/USBInterfaceMonitor of Utility ...