The IEC 61215-2:2021 standard specifies the test procedures for the design qualification and type approval of terrestrial PV modules for crystalline silicon and thin film modules. Its purpose is to verify the electrical and thermal performance of the module under general open air climate conditions and to ensure its long-term durability. The standard includes detailed requirements for UV radiation of the module, temperature control, as well as performance testing, designed to simulate actual use conditions to ensure the Reliability and Stability of the module in various environments. The standard also specifies the irradiance, temperature and Miscellaneous parameters during testing to guarantee the accuracy of test results and the suitability of the module.