... sine wave output with less than 3% THD9.Expandable backup time10.Generator compatible11.Cold start12.Load/Battery power meter ... Panel indication LCDInput,oupt,battery voltage,frequency,load rate,UPS state, temperature LEDMain input , bypass,Inverter,Battery,Over ... Whole unit85% Communication1.Power status 2.UPS shutdown 3.monitor UPS status 4.UPS self test 5.auto-save files Protection ...