Analysis of grid-connected PV systems for residential houses in the Tokyo area focusing on module temperature

We have analyzed field-test data collected from grid-connected PV systems for residential houses in the Tokyo area from August 1999 to July 2000 in detail, focusing on module temperature. It was demonstrated that the PV systems operated in the wide temperature range, and that the module temperature range in which the PV systems operated differed greatly even for the same type of module due to the installation environment. Further, we have discussed the influence of module temperature on annual output energy quantitatively. These results indicate that it is very important to consider the temperature characteristics of solar cells and the operation temperature of modules.