4 aspects to the quality problems of PV power generation systems

　　With the rapid development of the PV industry, the quality problems of PV power generation systems have become increasingly prominent, mainly in the following four aspects.

　　A: Low component performance

　　The components have problems such as hot spots, cracks, snail marks, yellowing and cracking of the backplane, corrosion of the bracket, and poor wind resistance. 30% of the power plants in PV power generation systems that have been built for more than 3 years will have quality problems of varying degrees: some PV power generation systems have a component attenuation rate of 3.8% to 7% after operating for 2 to 3 years, which is much higher than 2.7 %～3.5% standard; some PV power generation systems have a component degradation rate of 68% after 3 years of operation; individual PV power generation systems have a component degradation rate of as high as 30% after 1 year of operation.

　　B: Frequent component failures

　　Generally, PV power generation systems will enter a period of frequent failures after 2 to 6 years of operation, and key components such as components and inverters account for 90% of the failures. A PV power generation system was put into operation in 2012 with 70 inverters. By 2016, 30 inverters were out of operation, and the rest of the inverters are also in good and bad times.

　　C: Low system efficiency

　　The theoretical system efficiency of PV power generation systems is 80%, while PV power generation systems built after 2010 have not reached this level, with an average system efficiency of about 74%.

　　D: Safety accidents are increasing day by day.

　　In recent years, there have been accidents such as PV power generation systems being blown down by strong winds and catching fires all over the world.

　　In fact, these quality problems have severely restricted the development potential of the PV industry. Although countries around the world are working hard to promote clean energy, PV power generation is the main force, but we must be clear that supportive policies will one day withdraw. The most critical core for the sustainable development of PV products is the sincere recognition of the cost and quality of the products by the end customers. Only in this way can it be prosperous.

　　It should be noted that improving the quality of PV power generation systems is a complex system engineering, and the analysis presented in this article is a high-level generalization, and needs to be further classified, classified, and refined.

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