... PWM control CE,TUV,ROHS SOLAR WATERPROOF CONTROLLER WITH BUILT-IN LED DRIVER(SDL-SF60W) CharacteristicsControl circuit use MCU ... inside short circuit, reverse connection, thunder andlightning, PV panel reverse current, over charging and discharging etc. duringthe short ... be damaged andneed change, include fuseLEDindication on system condition LED indicating the system of charging, overcharge, power full ...