There are many types, sizes and manufactured Solar Charge Controllers on the market today. Each type comes with their own specific functions depending on your specific Solar Power System setup.

       PWM (Pulse Width Modulation)

       The PWM charge controller is fundamentally the same as we explained above, it holds the voltage constantly to a safe maximum until the battery reaches full charge.

       When fully charged the controller will drop the voltage and trickle the charge to such a rate that it simply keeps the battery “topped up”.

       This type of controller has been around for many years in Solar Power Systems, it is an established technology which is inexpensive, however, there are drawbacks.

       Pros

•Time-tested technology

•Affordable

•Long lasting

•Comes in a variety of sizes