... PWM control CE,TUV,ROHS SOLAR WATERPROOF CONTROLLER WITH BUILT-IN LED DRIVER(SDL-SF60W) CharacteristicsControl circuit use MCU ... way. Boost, recovery and float charging auto work for batterylong-life. Use temperature compensationHighaccuracy over discharging control ... be damaged andneed change, include fuseLEDindication on system condition LED indicating the system of charging, overcharge, power full, ...