EV charging station using renewable energy

Abstract

In recent years, installation of renewable energy facilities is increasing rapidly in response to the movement to suppress the release of greenhouse gasses responsible for the warming of the earth and to save fossil fuels, which are growing increasingly precious. Furthermore, the cost of photovoltaic systems is decreasing year by year. Therefore, it is assumed that price of photovoltaic power will be falling in the future. However, in Japan, the large amount of surplus electricity power from photovoltaic systems exerts a bad influence on the power grid. In this study, an EV charging station utilizing renewable energy is proposed as a business model. The proposed EV charging station purchases power from photovoltaic systems at a low price and uses that power to charge a fixed battery. Then the power is sold, being used to charge electric vehicles during the daytime. Moreover, the station can provide power to smart houses at an economical price when load demand is high. The effectiveness of the proposed EV charging station was verified with numerical simulations.