Solar photovoltaic power generation system is widely used in no power, power shortage, islands, border defense and remote areas. Photovoltaic power generation system is used as an independent power supply to household appliances and lighting equipment. The system is generally composed of photovoltaic array composed of solar modules, photovoltaic control inverter integrated machine (built-in controller) battery pack, etc. the photovoltaic array converts solar energy into electric energy, charges the battery pack through the photovoltaic charging controller, and then the battery provides stable direct current, which is converted into usable civil AC through inverter to supply power to the load. The system has the advantages of green environmental protection, energy conservation and emission reduction, zero emission, zero pollution, zero electricity charge, safety and reliability, no noise, no restriction of resource distribution region, high economy and high energy quality.