Why a “full charge” is the wrong number to budget with
Few drivers charge from empty to full, so the number that shapes your bill is energy per mile: 30.7 kWh per 100 miles for the Ford Mustang Mach-E RWD Extended Range. EPA measures it at the wall outlet on Level 2 charging, so the energy lost in the charger is already included. The average US car covers about 11,040 miles a year (FHWA), which for this model is about 3,389 kWh.
Cold weather raises consumption. In testing cited by fueleconomy.gov (a AAA study), EV efficiency at 20°F was about 39% lower with the cabin heater on, and 8% lower with it off.
Your tariff matters as much as the car: on a time-of-use EV plan the overnight price can be a fraction of the evening peak. Put your utility and charging hour into the EV charging cost calculator for your real number.
EPA version used: 2026 Ford Mustang Mach-E RWD Extended. Other trims, wheels or tires rate differently; see all versions on fueleconomy.gov.
Similar efficiency
Chevrolet Equinox EV FWD (31.1 kWh/100 mi), Hyundai Ioniq 5 RWD (30 kWh/100 mi), Volkswagen ID.4 (29.8 kWh/100 mi), Kia EV6 Long Range RWD (29.6 kWh/100 mi).