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How many factors do you know that affect the output of photovoltaic modules?

How many factors do you know that affect the output of photovoltaic modules?

  • Classification:Company News
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  • Release Time:2021-11-29
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【概要描述】1. Dust and rain shelter. Large-scale photovoltaic power plants are generally built in the Gobi area. There is a lot of wind and sand, and there is little precipitation. At the same time, the frequenc

How many factors do you know that affect the output of photovoltaic modules?

【概要描述】1. Dust and rain shelter. Large-scale photovoltaic power plants are generally built in the Gobi area. There is a lot of wind and sand, and there is little precipitation. At the same time, the frequenc

  • Classification:Company News
  • 作者:
  • 来源:
  • Release Time:2021-11-29
  • 访问量:0
详情
1. Dust and rain shelter. Large-scale photovoltaic power plants are generally built in the Gobi area. There is a lot of wind and sand, and there is little precipitation. At the same time, the frequency of cleaning is not too high. After long-term use, it can cause a loss of efficiency of about 8%.
 
2. Cell cracks Cracks are defects of the battery. Due to the characteristics of the crystal structure itself, crystalline silicon cells are easily broken. The production process of crystalline silicon modules is very long, and many links may cause cracks in the battery. The root cause of cracking can be summarized as the mechanical stress or thermal stress of the silicon wafer.
 
3. PID effect Potential-induced attenuation effect is that battery components are exposed to high voltage for a long time, causing leakage current between the glass and packaging materials, and a large amount of charge is sniped on the surface of the battery, which deteriorates the passivation effect of the battery surface, resulting in low module performance. Based on design standards. When the PID phenomenon is serious, the power of a module will be attenuated by more than 50%, thereby affecting the power output of the entire string. The PID phenomenon is most prone to occur in coastal areas with high temperature, high humidity and high salinity. The main reasons for the component PID phenomenon are as follows:
 
(1) Cell reason: The uniformity of cell sheet resistance, the thickness of the anti-reflection layer and the refractive index, etc. all have different effects on PID performance.

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