GB/T 37663.1-2019 "Requirements for Outdoor Empirical Test of Distributed Photovoltaics in Wet Tropics, Part 1: Photovoltaic Modules" specifies the outdoor empirical test requirements for ground-based crystalline silicon and thin film photovoltaic modules (excluding concentrated photovoltaic modules). The standard covers sample requirements, test conditions, installation requirements, test process and result processing. It is suitable for photovoltaic power generation systems in warm-moist climate regions, and can also be referred to for sub-warm-moist climate regions. Photovoltaic modules for large-scale ground-based photovoltaic power plants can also be implemented in accordance with this standard. The standard does not apply to double-sided photovoltaic modules, and refers to a number of relevant standards and test methods to ensure the long-term performance and Reliability of photovoltai