Electric is already here, shocking though that may be (sorry couldn't resist it). So we all need to get used to it and see how to make the best of it. The electricity required can be from batteries or fuel cells. Hydrogen has been mentioned and could be a way forward. Bit of a waste of time for ICE's though as an electric motor is 3 to 4 times more efficient that an ICE. I do about 3.6 to 4 miles per kWh in a Kia eNiro, compared to 0.9 to 1 mile per kWh (42mpg) in my last ICE car a Skoda Yeti. Just use fuel cells with electric motors. This may save some weight, compared to using batteries, although the hydrogen is held at very high pressure in heavy steel tanks. This may be a solution for some Camper vans, especially if you want the benefit from pulling into a fuel station and refilling your energy store relatively quickly. Personally the car I now drive is great for most of my needs, quiet, very powerful, really relaxing driving and charging is easy. I just plug into a domestic 3 pin plug and it takes 2.2kW (10Amp). Yes it takes a long time, but how much time do most people actually drive for and how much time is it doing nothing? We use it at a caravan site and either plug in the caravan or the car, there is more than sufficient power in the caravan battery to cover when the car is on charge. With a MoHo or camper van it would probably need dedicated charging facilities, but these will have to come if they do phase out ICE's. Off grid will be the big problem, not sure how you get round that without hydrogen and a genny! Nearly forgot to mention range! You worry about it at first, but after the first week it no longer mattered!