With EV's there's still the issue of the cold both reducing range and slowing charging. To test the theory, on Christmas EV we had a rare cold snap in which our low was 9°F and the high was low 20's. Because we weren't driving for 24 hours (we were already at family's house) I watched the battery level affected only by cold weather as the EV sat outside. The battery level dropped around 5%. That was just one harsh day of cold (harsh to us in Alabama). Imagine how much the battery level would drop if the temp never got into double digits all day.
And on the EV forum I frequent for tips, the true believers in warmageddon are aghast at how poorly their EV's perform in the cold. No one should get an EV without first doing his homework on the EV's strengths and weaknesses and if their normal situations play up the EV's strengths or the EV's weaknesses.