2027 BMW i5 xDrive40 Sedan (20 inch Wheels): home charging cost in Hawaii

At Hawaii's residential electricity rate of 45.95¢/kWh, a 2027 BMW i5 xDrive40 Sedan (20 inch Wheels) (rated 35 kWh per 100 miles by the EPA) costs $16.09 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. This model costs more to charge at home than gas would here: 0.4% more than gas per mile here, not less — the arithmetic isn't clamped to always favor charging.

What a year of driving costs

Driving 15,000 miles a year — fueleconomy.gov's own default assumption — a 2027 BMW i5 xDrive40 Sedan (20 inch Wheels) charged at home in Hawaii costs about $2,414/year in electricity, against about $2,403/year for the gas-car comparison. That's about $11 MORE a year than the gas comparison, not less.

What one full charge costs

A 2027 BMW i5 xDrive40 Sedan (20 inch Wheels) needs roughly 95.6 kWh to reach its EPA-rated 273-mile range, which runs about $43.93 at 45.95¢/kWh in Hawaii.

How this compares nationally

This combination ranks 20,105 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The BMW i5 xDrive40 Sedan (20 inch Wheels) alone ranks 149 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.

Line up a few Hawaii electrician quotes for Level 2 install before you commit either way.

Where these figures come from

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.