The Electrochemical Reactions in Crystalline Silicon Solar Modules

Crystalline silicon solar modules are the most important unit in photovoltaic system. The output power of the module will be at least 80% of its initial nominal power after 25 years. In this paper, the electrochemical reactions in crystalline silicon solar modules are investigated. It is found that the reactions in daytime are different from the reactions in nighttime because of existence an electric field. It is pointed out that some ions produced by the electrochemical reactions are the root cause of leakage current of solar modules. The electrochemical reactions cause corrosion and delamination in crystalline silicon solar modules.