The solar controller is widely used in some photovoltaic systems that use solar energy. The solar controller is just an abbreviation of its name. Its full name is the solar charge and discharge controller. Its main function is to ensure that the solar panel can work effectively and normally. Some storage batteries can also work normally under load. Its role is very important. It is the most important accessory among the many components of the photovoltaic system. With the help of the solar controller, the whole solar photovoltaic system can work normally and effectively, which provides the most basic guarantee for the high efficiency of the photovoltaic system.