Maybe ~30 cents is a "typical" rate at a commercial unit? The figure used below is highly optimistic. If we use the Tesla figure and $0.30, the cost would be $7.20 per hundred miles, using a commercial charger at that probably lowish rate. That's obviously better than my 33 mpg Hyundai at $3/gallon ($9, which is not markedly worse).
Charging at home in CA at 28 cents is roughly the same but gasoline is probably 50% more expensive there as well. I keep coming up with various figures that don't show a marked lower cost of operation for an EV, unless we charge at home here at 15 cents or so.
If I could charge at home at 15 cents, 100 miles in a Tesla would be $3.60 which starts to be decent. I keep going back to this because I see all sorts of calculations like the one below showing a marked advantage but they nearly all speak to charging at home (which might be most of the charging).
What is kWh per 100 Miles? (jdpower.com)Once a kWh/100 miles rating is known, a shopper can quickly calculate the cost to operate the vehicle by multiplying this figure by the price of electricity per kWh.
For example, a
2021 Tesla Model 3 with a standard-range battery has a rating of 24 kWh/100 miles, while a Ford Mustang Mach-E with a standard-range battery has a rating of 34 kWh/100 miles.
If the national average price of residential electricity costs 13.29 cents per kWh*, then the cost of charging the
Tesla would be 24 kWh times 13.29 cents, which equals $3.19. The
Ford, at 34 kWh, costs $4.52. That means driving the Model 3 a distance of 100 miles costs $1.33 less than driving a Mustang Mach-E the same distance.
Furthermore, in this scenario, the annual cost of electricity to drive a Tesla Model 3 for 12,000 miles would be a thrifty $382.80 ($3.19 times 12,000 divided by 100). The
Ford Mustang Mach-E would run you $542.40 for the year. That's an annual cost difference of $159.60.
However, keep in mind that the cost of electricity can vary significantly based on the time of day and where you are charging a vehicle.