... backup time10.Generator compatible11.Cold start12.Load/Battery power meter display13.Overload, on-line, battery status LED/LCD14. ... GND Output Voltage Range220VAC ±1% or 110VAC ±1% Frequency50/60Hz ± 0.3% PhaseSingle phase + GND THD< 3% (linear load), < 5 ... LCDInput,oupt,battery voltage,frequency,load rate,UPS state, temperature LEDMain input , bypass,Inverter,Battery,Over load,Fault Efficiency ...