Photovoltaic power generation is a kind of technology which can directly convert light energy into electric energy by the photovoltaic effect of semiconductor interface. The key element of this technology is solar cell. Solar cells after series of packaging protection can form a large area of solar cell components, coupled with the power controller and other components on the formation of photovoltaic power generation device. The advantages of photovoltaic power generation is less limited by geographical restrictions, because the sun shines the earth; photovoltaic system also has a safe and reliable, no noise, low pollution, no need to consume fuel and the construction of power transmission line can be used in the short construction period.
Photovoltaic power generation is based on the photovoltaic effect principle, the use of solar cells will be solar energy directly into electricity. The photovoltaic system is composed of three parts, which are mainly composed of solar panels (components), controller and inverter, which are mainly composed of electronic components, which are not related to mechanical components. Therefore, the photovoltaic power generation equipment is very refined, which can be used for long life, easy installation and maintenance. In theory, photovoltaic power generation technology can be used in any need of power on the occasion, on the spacecraft, the next to the home power supply, the power to the power, small to toys, photovoltaic power everywhere. Solar photovoltaic power generation is the most basic element of solar cells (chip), a single crystal silicon, polycrystalline silicon, amorphous silicon and thin-film batteries, etc.. Single crystal and multi - crystal cell amount is the largest, amorphous battery used in some small system and computer auxiliary power supply, etc..
The efficiency of domestic crystalline silicon cell is about 10 to 13%, and the efficiency of the same kind of product is about 18 to 23%. Solar panel, consisting of one or more solar panels, is called a PV module. Photovoltaic power generation products are mainly used in three major aspects: first, to provide power for the non electric power supply, mainly for the vast number of non electric area residents living in the production of electricity, as well as microwave power, communication power, etc., but also includes some mobile power and standby power; two is the sun can daily electronic products, such as various solar charger, solar street lamp and solar lawn lamp, etc.; three is grid connected power, which has been widely used in developed countries. China's grid connected power generation has not yet started, but in 2008 the Beijing Olympic Games in part by solar power and wind power supply.