Performance Test of a Rooftop PV System in China

With the development of Photovoltaic (PV) power system, the operating quality and generating efficiency have become the major questions that people pay close attention to. PV systems are being installed in various ways and sites with different geographical and climatic condition, such as rooftop, agricultural greenhouse, lake, mountain and desert. The power system performance evaluation method should be discriminating for different system type. A rooftop PV power plant in south China was tested for performance analysis. Test items include soiling loss, power degradation, Infrared Radiation (IR) test, mismatch loss, shade evaluation,, cable loss and inverter efficiency. The analysis results are important for improving the performance and efficiency of PV power system.