4 cents per kWh is one cent per mile in a model 3 sized EV. I am getting 180 to 220 wh per mile at 75mph and the A.C. Ripping that’s equal to gas tax at 20 cents per gallon at 20mpg so it’s still higher than the fleet avg mpg tax rate at 25mpg and with a hybrid like a full sized Camry getting 50+ mpg hwy half as much for the hybrid. Still most people only supercharger on road trips so it’s a tiny fraction of the opex per year in a EV that home charges. This is why Texas went to a flat yearly tax to tax the home chargers which in Texas is at a higher rate than the avg ICE driver is paying at that.
Agreed. Alabama's flat EV annual tax of $200 was part of my math on list of pro's and con's with whether we should get an EV and do most of our driving in it. I'm not complaining at all about it -- us EV owners should also pay our share of road upkeep.
I'm just saying it is what it is, along with the increase in my monthly car insurance premium to cover a more expensive car, and more tire replacements to account for the fact that my EV weighs about 10% more than the ICE car it replaced, and increase in my power bill (especially if I didn't have solar), but no gas, no oil changes, less brake work because of regen braking.
By my judgement, with the past year's worth of power rates and gas costs in Alabama (and the aforementioned items like the EV annual fee), I'd say about 12K or 13K miles per year of home charged miles is the threshold for if a married couple ought to consider one of their next cars being an EV. That's just from a costs vs. savings perspective, not other things like zippy acceleration and the convenience of charging at home, etc.
As I've posted before, for me the main thing about having an EV is that I can provide most of my power homemade from solar so that our transportation is a bit more self-reliant. But I wasn't willing to do that unless it also was feasible enough to recoup the costs. (For us with solar that comes out to about 8K miles per year of local home charged driving, of which we do about twice that.)