Abstract
Optimum design of energy storage is a keen issue on the stand-alone energy system using renewable energy. However, the previous design method does not always give us satisfactory performance of the system. This is because the variations of the daily power generation and consumption caused by the weather condition are not taken into consideration. In this study, we have introduced a random variable, which takes into account the daily variations in capacity design. The present stand-alone energy system consists of the power storage device and the solar cells. We discuss on a technique for obtaining a probabilistic relationship between the performance of the system and the capacity of the power storage device.
