In future, plug-in hybrid automobile (PHV)/electric vehicle (EV) will come into use with the arrival of Low-carbon society in the next twenty years. On the other hand, the power generation system using renewable energy installed in power system as one of the countermeasure for problems of the global warming. Then, the new problems in EV and energy will occur. This paper describes the examination is carried out on the charge control method of PHV/EV in the micro-grid for efficient use of the battery.