The main idea behind V2G is to take advantage of electric vehicle batteries when they are not used for driving, by charging and/or discharging them at appropriate times. For example, EVs can be charged to store excess renewable energy production and discharged to feed energy back into the grid during consumption peaks. This not only supports the introduction of renewable energies to the grid, but also prevents the use of fossil fuels thanks to an improved management of the grid. Therefore V2G is a ‘win’ for the user (thanks to V2G monthly savings) and the positive environmental impact.