Charging a 2026 BMW i7 eDrive50 Sedan (21 inch Wheels) at home in Hawaii

In Hawaii, home electricity runs 45.95¢/kWh — put a 2026 BMW i7 eDrive50 Sedan (21 inch Wheels)'s EPA-rated 38.9 kWh/100mi against that and 100 miles costs $17.9, versus $16.02 for a gas car averaging 25.5 mpg. Here the math runs the other way: 11.7% more per mile than gasoline, because Hawaii's rate and this model's efficiency combine unfavorably.

What a year of driving costs

Hawaii owners putting 15,000 annual miles on a 2026 BMW i7 eDrive50 Sedan (21 inch Wheels) spend about $2,685 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. At this mileage, that's roughly $282 a year worse than the gas comparison.

Filling up the 2026 BMW i7 eDrive50 Sedan (21 inch Wheels), in dollars

At Hawaii's rate, fully covering this 2026 BMW i7 eDrive50 Sedan (21 inch Wheels)'s 307-mile EPA range costs about $54.94 (119.6 kWh) — the energy the EPA test actually used, not the battery's rated size.

How this compares nationally

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 BMW i7 eDrive50 Sedan (21 inch Wheels) in Hawaii ranks 20,218 for cost savings versus gas — 1 being the best deal nationally. Separately, the BMW i7 eDrive50 Sedan (21 inch Wheels) ranks 236 of 400 EV models for raw efficiency, and Hawaii ranks 51 of 51 for cheapest residential electricity.

Getting set up to charge a 2026 BMW i7 eDrive50 Sedan (21 inch Wheels) at home

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.

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

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.