| Abstract |
Evaluation methods of deterioration of a photovoltaic system are proposed and compared based on the on-line generation data at Tokyo Station and Yotsuya Station for about 5 years. The generations of these systems decrease about a few \% per year, which deterioration values are larger than previously reported values. Proposed evaluation methods solve problems of generation fluctuations caused by not only generation efficiency degradation but also weather, temperature, shadow of surrounding buildings and so on. Such on-line evaluation methods of a photovoltaic system have been rarely reported and will be valuable for simple evaluation and monitoring the generation trends of the system. |
