PWM controller uses the digital output of microprocessor to control the analog circuit.which adopt strong charge, balanced charge and floating charge. PWM solar controller solves the problem of insufficient battery charge and short battery life, but the solar panel is not fully utilized.

       MPPT solar controller adoptes the Maximum Power Point Tracking function.mppt solar controller can monitor real-time voltage and current of solar panels, then continuously track Maximum Power, the battery is always charged for the most high Power .

       The charging capacity can be increased by 30% with MPPT controller than ordinary controller.