Charging a 2026 Ford Mustang Mach-E Rally at home in Hawaii

In Hawaii, home electricity runs 45.95¢/kWh — put a 2026 Ford Mustang Mach-E Rally's EPA-rated 40.2 kWh/100mi against that and 100 miles costs $18.45, versus $16.02 for a gas car averaging 25.5 mpg. Here the math runs the other way: 15.2% more per mile than gasoline, because Hawaii's rate and this model's efficiency combine unfavorably.

Annual cost, at 15 thousands miles a year

Hawaii owners putting 15,000 annual miles on a 2026 Ford Mustang Mach-E Rally spend about $2,768 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. At this mileage, that's roughly $365 a year worse than the gas comparison.

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

At Hawaii's rate, fully covering this 2026 Ford Mustang Mach-E Rally's 255-mile EPA range costs about $47.05 (102.4 kWh) — the energy the EPA test actually used, not the battery's rated size.

Where this ranks

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Ford Mustang Mach-E Rally in Hawaii ranks 20,257 for cost savings versus gas — 1 being the best deal nationally. Separately, the Ford Mustang Mach-E Rally ranks 271 of 400 EV models for raw efficiency, and Hawaii ranks 51 of 51 for cheapest residential electricity.

Before you install a home charger in Hawaii

Everything above is the per-mile and per-year cost once a home charger exists — getting one installed is a separate electrical job whose price depends on your panel and wiring, not the state average used here.

Ask a licensed Hawaii electrician to quote the install before this math becomes a real decision.

More on how this number was built

Every figure on this page traces to a named EIA or EPA dataset — see the methodology guide. This is one of the combinations where charging costs more than gas — the guide to when that happens explains why the arithmetic can go either way.