A charge controller or charge regulator is basically a voltage and/or current regulator to keep batteries from overcharging. It prevents overcharging and may protect against overvoltage, which can reduce battery performance or lifespan, and may pose a safety risk.
Both technologies are widely used in the off-grid solar industry and are both great options for efficiently charging your battery. MPPT controller is more efficient than the PWM controller. Output 10% to 30% more power with MPPT controller. MPPT controller can be use for high voltage solar panel to charge 12V battery bank. It changes the high voltage to more amps. Most systems are using the MPPT controllers these days.
We carry many different brands, Epever, Magnum, Midnite Solar, Morningstar, Outback Power, Schneider Electric and SolarEngine.