To charge the battery, the output voltage of the solar panel must be higher than the current voltage of the battery, if the voltage of the solar panel is lower than the voltage of the battery, the output current will be close to 0.
The usual solar controller structure is to hang the output of the solar panel directly on the battery port, and cut off when the battery is full.
When we drive on the highway, we can often see billboards, which are well-lit during the day and can be seen clearly, but are still displayed when there is no light at night.
The MPPT solar controller can detect the power generation voltage of the solar panel in real time, and track the highest voltage and current value (VI),
Traditional MPPT methods are divided into open-loop and closed-loop MPPT methods according to the difference of judgment methods and criteria.
The main functions of the MPPT controller: detect the DC voltage and output current of the main circuit, calculate the output power of the solar array, and realize the tracking of the maximum power point.