Abstract
The purpose of this study is to investigate conventional photovoltaic (PV) and concentrator photovoltaic (CPV) system performance. The CPV system is operational in Okayama, Japan. The impact of different climates conditions on the system is studied. The system has been collecting data since 2011. The relationship between CPV performance and the environment is more complex than that of the conventional flat-plate PV. It is important to define the primary factors leading to these differences and accelerate installation as a clean energy generation. One of the factors is spectral distribution. Furthermore, the relationship between the I-V characteristics of the system and the environment parameter is discussed.
