ANNUAL DEGRADATION RATES OF CRYSTALLINE SILICON PHOTOVOLTAIC MODULES IN DIFFERENT CLIMATIC ZONES IN CHINA

摘要

Module degradation rates in different climatic zones are investigated in this work. Three outdoor PV systems are installed in different places in China. Modules are uninstalled and moved to a local laboratory to do the STC I-V measurements every three months. Degradation rates differ due to the different climatic features, and also the module types. The environment factors affect degradation rate in varying degrees. Glass-backsheet module is sensitive to UV, while dual-glass module is sensitive to a damp heat environment. Dual-glass module has a minor degradation rate than glass-backsheet module in the three sites. Energy output of module is affected by the power degradation. Electricity/power gain is related to the less degradation rate.