We hope you do buy an electric vehicle and charge it with solar power! If you do need more electricity and plan to buy your new car soon, we can incorporate that into the design and work with the utility to have it approved. If you buy the EV years down the road, we can come back and add more solar panels, certainly. However, due to economies of scale and general efficiencies, we do recommend having the larger system installed up front if you can, as it will save you some money.