Effect of potential induced degradation on crystalline silicon solar modules in photovoltaic power plant

Crystalline Silicon solar cells that affected by potential induced degradation (PID) are investigated in recent years. PID has negative effects, especially power loss, on reliability and long-term performance of photovoltaic (PV) system. Then the law of modules with PID in the field is not published. In this paper, some significant conclusions were obtained through a large number of data analyzing. Modules with PID in a string are close to negative potential. The phenomenon of PID close to the edge of a module is serious than others. This discovery lays a foundation for the study and prevention of PID.