PWM is the abbreviation of Pulse Width Modulation,PWM Solar Charge Controller is a high efficient charge method to regulate the battery voltage, the PWM control mode is a mature control solution, it is simple, economic, safe and high reliable, they are widely used in the for Solar Charge Controller, as mentioned before, when you select a PWM Solar Charge Controller, the output voltage of Solar panel must be matched the voltage of Solar Charge Controller.
MPPT is the abbreviation of Maximum Power Point Tracking, MPPT Solar Charge Controller is an automatic method for tracking and controlling the solar energy, MPPT Solar Charge Controller is used with the complex software and hardware to increase the efficiency of solar energy converted, when the battery is deeply discharged or battery voltage is very lower, it can obviously increase the solar energy efficiency.
