A study on the feasibility of using an EV to grid system has shown that, rather than degrade the lihtium-ion batteries, could in fact further extend their lifetime opening greater options for both a smart grid using the electric vehicles and an optimised life cycle for vehicles and their batteries.
This has the capacity to transform towns, cities and countries to use the growing EV market to optimise their own smart grid. If matched with smart city planning (EV charging stations, allowing greater access to instant hire EVs using zipcar or alternative etc) it would allow another option for facilitating a smart grid.
Although it is an early study in optimised conditions there are other studies into this to see just how feasible it is and to see whether their is an opportunity to use V2G to optimise battery life.
On the possibility of extending the lifetime of lithium-ion batteries through optimal V2G facilitated by an integrated vehicle and smart-grid system - ScienceDirect
Renewable energies are a key pillar of power sector decarbonisation. Due to the variability and uncertainty they add however, there is an increased need for energy storage. This adds additional infrastructure costs to a degree that is unviable: for an optimal case of 15 GW of storage by 2030, the cost of storage is circa: £1000/kW.