The solar energy storage system consists of photovoltaic equipment and energy storage equipment. The photovoltaic equipment will absorb solar energy and convert it into electrical energy, and the energy storage equipment will store the electrical energy generated by the photovoltaic equipment. When the power of the photovoltaic system is insufficient, the energy storage system will Through conversion, the stored electrical energy is converted into the required AC power grid for use. It has high power generation efficiency, low cost, helps energy conservation and emission reduction, realizes flexible adjustment of power resources, and can improve the security of the power grid.