The Energy Systems Catapult recently published a study, by low carbon energy consultancy Element Energy, Vehicle to Grid Britain. The study examines the long-term values available to users of vehicle-to-grid (V2G) technology. V2G allows EV batteries to export energy to the networks, whether that be the home or business it is connected to, or the wider system. Vehicle owners could also capture value from grid services, as well as smart charging benefits which reduce the cost of importing energy by doing so at times of low cost.
Our chart this week compares the projected savings for average and high plug-in rates, assuming a 7kW charger as may be typical for a domestic-scale unit. A V2G-capable charger at an average plug-in rate could roughly double the value added by a smart charger, from £110/year to £221/year or around a quarter of fuel costs.