What is PWM mode? What is MPPT mode?
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PWM is the abbreviation of Pulse Width Modulationit 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 solar energy filed, as mentioned before, when you select a PWM solar controller, the output voltage of Solar panel must be matched the voltage of solar controller.


MPPT is the abbreviation of Maximum Power Point Tracking, it is an automatic method for tracking and controlling the solar energy, it 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.