... When pole wrong, AC input protection against over and low voltage, Output protection against over load, shor circuit Protection, ... Voltage120/220/230/240VAC(bypass mode sync to input)Voltage Regulation±10%rms(bypass mode sync to input)Frequency50Hz ... left,LED1 line mode (green lighting),LED2 inverter mode(green lighting),LED3 charging mode(yellow lighting),LED4 Fully charged (green lighting),LED5 over ...