Abstract: With the development of renewable energy,smart grid,distributed generation technologies,electric vehicles (EVs) have been widely regarded as a key energy storage infrastructure in the future power grid system. The high cost of electric energy storage is currently an outstanding barrier for their applications. Through a V2G configuration,EV batteries could offer a cost-efficient way of shaving the grid's peak load,regulating power frequency and smoothing renewables' generation. The large potential benefits of EV storage could in turn reduce the cost of EV application in transport sector and accelerate the electrification of road transport. This paper analyzes current EV storage technologies,infrastructure establishment and businesses models,and estimate the EV storage potentials and associated policy instruments.

Key words: electric vehicle, V2G, energy storage, charging infrastructure, business models, renewable energy