Using data from a national stated preference survey, this paper presents the first study of the potential consumer demand for V2G electric vehicles. In a choice experiment, 3029 respondents compared their preferred gasoline vehicle with two V2G electric vehicles. The V2G vehicles were described by a set of electric vehicle attributes and V2G contract requirements such as “required plug-in time” and “guaranteed minimum driving range”. The contract requirements specify a contract between drivers and a power aggregator for providing reserve power to the grid. Our findings suggest that the V2G concept is mostly likely to help EVs on the market if power aggregators operate on pay-as-you-go basis or provide consumers with advanced cash payment (upfront discounts on the price of EVs) in exchange for restrictions inherent in V2G vehicles.