IEC 61701 is a standard developed by the International Electrotechnical Commission, which specifies the salt fog corrosion test method of photovoltaic (PV) modules. The standard aims to evaluate the corrosion resistance of photovoltaic modules in chlorine-containing salt fog environment (such as NaCl, MgCl ³, etc.), and is suitable for various types of photovoltaic modules. The test content includes Appearance inspection, electrical performance test and structural integrity evaluation. The test conditions include parameters such as salt fog concentration, temperature, Humidity and exposure time. Testing through this standard can provide a scientific basis for the quality control, Reliability evaluation and application in harsh environments of photovoltaic modules.