High penetration of renewable generation systems will lead to supply-demand imbalances, and will also require output curtailment of renewable power plants. We focused on management of electric vehicle fleet charging which can promote charging during specific time zone for reducing this curtailment. In this study, we evaluated the Charging Promoting Potential (CPP) of passenger EVs using optimization model based on the mixed integer linear programming. In addition, we also evaluated the CPP of other EVs, such as electric buses and electric trucks. We found that wider zone of the charging promoting time led effective concentration of charging load. Further, we found that the CPP of the electric buses is higher than those of the passenger EVs and electric trucks.