Practical storage and utilization of household photovoltaic energy by electric vehicle battery

In this paper, the authors analyze the household electrical energy balance and self-sustainable consumption of PV-generated energy utilizing the battery of an electric vehicle (EV) parked at home including a practical “vehicle to home” operation. We have estimated typical domestic electricity consumption patterns from actual measurement of various households. Also, typical ranges of solar PV output by random weather changes over a week in different seasons of the year are assumed from solar irradiance measurement and weather patterns. To find weekly charge/discharge cycles, we assumed different driving scenarios for weekdays and weekends. For comparison we have tested several different charge/discharge combinations and various charging schemes. To measure the contribution of an EV as energy storage for a house equipped with a PV panel, the rate of utilization of PV-generated energy, the amount of CO2 reduction at household, and cost reduction are calculated. From the results presented here the authors are convinced that a plug-in electric vehicle can contribute for better utilization of PV-generated electricity.