There is plenty of energy produced wigwam but not necessarily at the time it’s needed. BEVs can soak up all the spare energy generated and store it in the battery for use later. V2G chargers are the key to releasing this energy back into the grid when it’s needed.
As it stands electricity generators are paid to switch off energy production when there is no demand. As more and more BEVs come to the market the need for this will reduce until it stops completely.