This part specifies the testing requirements for PV modules installed and used under general climate conditions. Applicable to ground-use crystalline silicon PV modules to ensure their Reliability and performance in a standard climate environment. A number of standard documents are cited, covering aspects such as natural environment conditions, Measurement principles of PV devices, design qualification and finalization of PV modules. These standard documents ensure stable operation of PV modules under general climate conditions, including consideration of natural environment factors such as temperature, Humidity, solar radiation, precipitation and wind.