Buck-boost MPPT charging controller

The utility model belongs to the technical field of controllers, and discloses a buck-boost MPPT (maximum power point tracking) charging controller, which comprises a shell, terminal interfaces are arranged on the outer side of the shell, radiating fins are equidistantly arranged at the top of the shell, the terminal interfaces comprise a solar panel interface and a rechargeable battery interface, and the solar panel interface is connected with the rechargeable battery interface. The solar cell panel interface is used for being connected with a solar cell panel, the rechargeable battery interface is used for being connected with a rechargeable battery, an MPPT master controller is arranged in the shell, the input end of the MPPT master controller is connected with an MPPT algorithm module, and the input end of the MPPT algorithm module is connected with the solar cell panel interface. According to the MPPT charging controller, automatic buck-boost adjustment can be realized, a user does not need to consider i