Fag packet calculation time...
Attended a talk recently where someone did the figures of what it would take if everyone moved to Electric vehicles by 2040 in the UK (as is currently planned. )
Assuming about 25 million vehicles, and the fact most if not all will be plugged in to recharge during the evening, we would need about 5 more new nuclear power stations, or cover Cornwall with wall to wall solar cells, or Scotland with wind turbines.
of course this makes a lot of assumptions (it doesn't consider rapid charging [worse], or new technologies
such as mass storage), but considering the present UK governments track record on long term planning (i.e more than a week) and the difficulties of any large infrastructure project getting of the ground (Swansea tidal lagoon), I don't think we will be all swanning around in electric vehicles anytime soon.