GB/T 9535.2-2025 Terrestrial photovoltaic(PV)modules—Design qualification and type approval—Part 2:Test procedures

Scope

This document specifies the design and qualification requirements for ground-mounted photovoltaic modules operating under long-term outdoor climatic conditions. Whether the module's service life meets the standard depends on its design, environmental, and operating conditions. Test results cannot be used as a basis for predicting the module's lifespan.
This document applies to all types of ground-mounted flat-panel modules, such as crystalline silicon modules or thin-film modules.
This document does not apply to high-concentration photovoltaic modules, but it can be used for low-concentration photovoltaic modules (concentration ratio of 1~3 times). For low-concentration photovoltaic modules, all tests are conducted under irradiance, current, voltage, and power levels designed for the concentration conditions.
When the 98th percentile operating temperature of the photovoltaic module exceeds 70 °C, it is recommended to conduct tests under higher temperature conditions specified in IEC TS 63126. When certifying photovoltaic products with lower expected lifespan, it is recommended to use the test conditions specified in IEC TS 63163 for consumer photovoltaic electronics. To ensure that the characteristics of mass-produced modules are consistent with those of tested modules, it is recommended to conduct a quality system verification of photovoltaic manufacturers in accordance with IEC 62941.
The purpose of the test sequences in this document is to verify the electrical characteristics of the module and evaluate its ability to withstand long-term outdoor exposure at a reasonable cost and time. To replicate the failures observed in the field, accelerated test conditions have been set based on experience and are applicable to all types of modules. The acceleration factor may vary depending on the product design and may not necessarily reflect all degradation mechanisms. For more information on accelerated test methods, including term definit

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