GB/T 37663.2-2019 "Requirements for outdoor empirical testing of distributed photovoltaics in humid hot zones, Part 2: Photovoltaic backplates" specifies the requirements for outdoor empirical testing of backplates for encapsulation of crystalline silicon modules. The standard includes sample preparation, test site, performance testing and evaluation of results. It is suitable for photovoltaic backplates in heat and humidity zones, and can also be referred to for "sub-heat and humidity" zones. The standard focuses on the long-term performance of backplates in heat and humidity environments to ensure their Reliability in practical applications. The standard cites a number of relevant test methods and material performance requirements, such as insulation electric strength, water vapor transmission rate and tensile performance.