MPPT controller is to track the maximum power point, it is to adjust the working state of the electrical module, so that the electrical system that can output more electric energy from the photovoltaic panel can store the direct current generated by the solar panel into the battery, which can effectively solve the problem Domestic and industrial electricity consumption in remote areas and tourist areas that cannot be covered by conventional power grids without causing environmental pollution.

First detect the DC voltage and output current of the main circuit, then calculate the output power of the solar array, and finally realize the tracking of the maximum power point. The disturbance resistor R and MOSFET connected in series, under the condition that the output voltage is basically stable, then by changing the duty cycle of the MOSFET, the average current passing through the resistance is changed, thus generating a current disturbance. At the same time, it will also affect the output current and voltage of the photovoltaic cell. By measuring the changes at this time, the disturbance direction of the next cycle can be determined. If the direction of the disturbance is correct, the output power of the solar photovoltaic panel will increase, and the next cycle will continue to disturb in the same direction, otherwise, it will disturb in the opposite direction, and so on, so that the output of the solar photovoltaic panel reaches the maximum power point.