2026 Ford Mustang Mach-E RWD: home charging cost in Hawaii

At Hawaii's residential electricity rate of 45.95¢/kWh, a 2026 Ford Mustang Mach-E RWD (rated 31.4 kWh per 100 miles by the EPA) costs $14.45 to drive 100 miles on home charging, against $16.02 for the same distance in a car averaging 25.5 mpg on gasoline at $4.085/gallon. Charging at home costs a little less than gas here: 9.8% less than gas per mile, here specifically.

What a year of driving costs

Driving 15,000 miles a year — fueleconomy.gov's own default assumption — a 2026 Ford Mustang Mach-E RWD charged at home in Hawaii costs about $2,167/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $236 a year.

Filling up the 2026 Ford Mustang Mach-E RWD, in dollars

A 2026 Ford Mustang Mach-E RWD needs roughly 81.7 kWh to reach its EPA-rated 260-mile range, which runs about $37.56 at 45.95¢/kWh in Hawaii.

Where this ranks

This combination ranks 19,912 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Ford Mustang Mach-E RWD alone ranks 79 of 400 models for efficiency; Hawaii alone ranks 51 of 51 states for electricity price.

Next step: home charger installation

The numbers above assume Level 2 home charging is already in place — the electrical work behind that is a real, separate cost that varies by panel, wiring, and local labor rates, not something this page's per-mile math includes.

Get quotes from local electricians for Level 2 charger installation in Hawaii before deciding.

Where these figures come from

See the methodology guide for exactly which EIA and EPA figures feed 2026 Ford Mustang Mach-E RWD's cost in Hawaii. Hawaii has some of the highest residential electricity rates in the country — see the guide to why the cost varies so much by state for the full picture.