Photovoltaic power generation is based on the principle of photovoltaic effect, the use of solar cells to directly convert solar energy into electricity. Whether it is independent use or grid-connected power generation, photovoltaic power generation system is mainly composed of solar panels (components), controllers and inverters, which are mainly composed of electronic components, do not involve mechanical parts, so photovoltaic power generation equipment is extremely refined, reliable and stable long life, easy installation and maintenance. In theory, photovoltaic power generation technology can be used for any occasion that needs power, from spacecraft to household power supplies, large to megawatt power stations, small to toys, photovoltaic power is everywhere. The efficiency of domestic crystalline silicon cells is about 10 to 13%, and the efficiency of similar foreign products is about 12 to 14%. A solar panel composed of one or more solar cells is called a photovoltaic module.

　　A typical system diagram is shown