Solar Charge Controllers

A solar charge controller is one of the main components of a solar panel system, charge controller is basically a voltage and/or current regulator to keep batteries from overcharging. It protects the batteries are not overcharged during the day, and disconnects  the load to prevent deep discharge. Solar charge controllers come in two ways. Pulse  width  modulation  (PWM)  charge controller provide  constant  voltage  battery charging  by  adjusting the  duty  ratio  of  the  switches and has Higher charging efficiency, Longer battery life. PWM reduced the battery over heating. Second one is the MPPT(Maximum Power Point Tracking) is most advanced solar charge controller, MPPT are more sophisticated and expensive. They calculating the VMP input voltage of the solar panel and then down-converts the PV voltage to match the battery voltage.