Evaluation of Electric Energy Output by Democratic Module PV System Field Test
Hideyuki TAKAKURA, Takeshi FUJII and Yoshihiro HAMAKAWA
Abstract:A systematic investigation has been made on generated electric energy from different Photovoltaic (PV) solar arrays consisting of three kinds of silicon based solar cells. Clarification of seasonal output power variations with temperature in c-Si and a-Si cells might be important issue for the operations of PV system. It has been shown from the results that output power from a-Si array is 20% larger than that from c-Si in summer. On the other hand, in winter, this scene should be reverted. However output power from c-Si array is only 5% larger than that from a-Si. The analyzed data also show that annually accumulated electric energy generated from a-Si array corresponds to 90% of its nominal efficiency in the year. While in case of c-Si array, this ratio is about 84%. Key Words:NEDO field test, Amorphous Si solar cell, Crystalline Si solar cell, Accumulated electric energy, Temperature dependence of solar cell efficiency