A charge controller is a very important feature of a solar system and protects batteries from overcharge and discharge. They are the maintenance free protection of your solar panel and batteries. Connecting a solar panel to a battery without a regulator seriously risks damaging the battery and potentially causing a safety concern. The solar charge controller PCIR0005 offered by MTX adopts the most advanced digital technique and operates fully automatically. The Pulse Width Modulation (PWM) battery charging can greatly increase the lifetime of the battery. It has full self protection, protection of overload, short circuit, reverse connection, over charging and over discharging.