This part of the standard specifies the testing requirements for photovoltaic modules installed and used in dry-heat climate conditions. It applies to ground-use crystalline silicon photovoltaic modules in dry-heat climate conditions, ensuring that they can work properly and maintain stable performance in high temperature and low humidity environments. A number of relevant standards are cited, including relevant environmental testing, measurement principles for photovoltaic devices, design qualification and finalization of photovoltaic modules, etc. These standards ensure the Reliability and durability of photovoltaic modules in dry-heat climate conditions to ensure their stable operation in harsh climate conditions.