First of all, we understand the concept of Solar photovoltaic system: an independent photovoltaic system is generally composed of the following three parts: charge, discharge controller, inverter, test instrument computer monitoring and other power electronic equipment; solar cell components and batteries or other storage Energy and auxiliary power generation equipment. Solar photovoltaic system has many advantages: operational reliability, good stability; no air pollution, no waste water discharge; no combustion process, no fuel; no rotating parts, no noise; simple maintenance, low maintenance costs, etc.