Maximum Power Point Tracking (MPPT) system is a by adjusting the working state of the electrical module, so that the photovoltaic panels can output more power of the electrical system can be issued by the solar panels stored in the battery effectively stored in the battery , Can effectively solve the conventional power grid can not cover the remote areas and tourism areas of living and industrial electricity, does not produce environmental pollution.

MPPT controller main function: to detect the main circuit DC voltage and output current, calculate the output power of solar arrays, and to achieve the maximum power point tracking. PerturbationresistanceR andSeries together, in the output voltage is basically stable under the conditions, by changing the MOSofDuty cycle, To change the average current through the resistor, resulting in the current disturbance. At the same time, the output current and voltage of the photovoltaic cell will also change, by measuring the perturbation before and after the photovoltaic cell output power and voltage changes to determine the next cycle of the perturbation direction, when the disturbance direction is correct when the solar energy output power increases, the next The cycle continues to disturb the same direction, on the contrary, in the opposite direction of the disturbance, so repeated the disturbance and observation to the solar photovoltaic panels output to the maximum power point.