I think there is an opposite side to this, that EV’s can make you less efficient in your driving – for some at least. Firstly, you are paying less to charge your car than fill it with petrol (unless you get stuck on certain motorway service stations and then you may pay just as much as petrol – as per a few YouTube reviews on certain networks). Due to this feeling that you are “saving” money and the quick response from many EV’s I expect that for many the “fun” factor will be too much to ignore; pulling away quickly at lights and roundabouts and accelerating quickly and driving fast because when you get home you can just recharge – if you have a home charger. So many EV’s may not be driven as economically as they can be.
I am more interested in the “MPG” of EV’s on a motorway, actually driving at 70mph and how that affects the range, again I have seen a few reviews on Youtube (by respected reviewers who are actually using the EV in the real world) that have found if they started with a 200 mile range and travelled on a motorway at a regular 70mph (which I admit is hard these days!) then there range would fall twice as quick, ie, for every 5 miles they did they would lose 10 miles of range; or the “better” EV’s might lose 7 miles for every 5 miles travelled. So you can start out with a 250 mile range, and travel at 70mph on a motorway to find that after 100 miles you only have 50-70 miles left and then need to think about recharging and where you are going to charge. This is a problem given the unstructured nature of the Recharging system – which should be nationally planned to encourage drivers to take up EV’s and not left to the haphazzard “free” market that typically confuses so that it can “overcharge”.