Compared with commonly used thermal power generation systems, the advantages of photovoltaic power generation are mainly reflected in: 1 no danger of exhaustion; 2 safe and reliable, no noise, no pollution, absolutely clean (no pollution); 3 Not limited by the geographical distribution of resources, the advantages of building roofs can be utilized; for example, areas without electricity, and areas with complex terrain; 4 It can generate electricity on site without consuming fuel and erecting transmission lines; 5 high energy quality; 6 users are emotionally acceptable; 7 The construction period is short, and the time taken to obtain energy is short. Disadvantages: 1 The energy distribution density of the irradiation is small, that is, it takes up a large area; 2 The energy obtained is related to meteorological conditions such as four seasons, day and night and cloudy. 3 high power generation costs Hex Nuts,Stainless Coupling Nut,Hex Connector Nut,M3 Nut Hebei W.M fastener manufacturing CO.,Ltd , https://www.wmfasteners.com