Common MPPT tracking methods include the following four:

1 Constant voltage tracking method

The output voltage of the panel is controlled at a specific voltage near its maximum power point, and an approximate maximum power output is obtained.

2 Perturbation observation method

Disturb the output voltage or current of the panel, then observe the change of the output power of the panel, and continuously change the direction of the disturbance voltage or current according to the trend of power change, so that the panel finally operates at the maximum power point.

3 Conductivity increment method

By comparing the instantaneous conductance and the change of conductance of the photovoltaic panel, the corresponding modulation is performed according to the comparison result to complete the function of maximum power point tracking.

4. Combination method of disturbance observation and constant voltage

Through the disturbance observation method, the voltage and power fluctuations are kept within a specific threshold range, and then the voltage is directly stabilized at the maximum power point by the constant voltage method. At the same time, by observing the output power, if there is a large fluctuation in the output power during the constant voltage, it is necessary to re-stabilize a new MPPT voltage. At this time, the constant voltage method is released, and the disturbance observation method is restarted, waiting for a new stable point to appear.