1, the use of solar energy power generation of economy in many cases is superior to the conventional way of power supply. Solar power system operation cost is low, requires little maintenance, do not need spare parts, do not need to add fuel. 2, solar system device can run automatically, and is suitable for use in his duty station. 3, does not contain any moving parts, the system can work continuously, the service life of more than decades. 4, solar power supply system of the dc output voltage is very stable. 5, no roads for lead grid, where there is no grid, flexible solar energy to provide may select site. 6, in addition to the direct economic benefits, solar power still has a lot of indirect benefits. In some other power supply system, often immediately due to power outages caused huge economic losses. Solar energy system can still guarantee work stably and reliably.