Charging a 2026 BMW i4 eDrive40 Gran Coupe (18 inch wheels) at home in Hawaii
At Hawaii's residential electricity rate of 45.95¢/kWh, a 2026 BMW i4 eDrive40 Gran Coupe (18 inch wheels) (rated 28.5 kWh per 100 miles by the EPA) costs $13.11 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. That works out to 18.2% cheaper per mile than gasoline in Hawaii — charging at home is cheaper than gas here.
Annual cost, at 15 thousands miles a year
Hawaii owners putting 15,000 annual miles on a 2026 BMW i4 eDrive40 Gran Coupe (18 inch wheels) spend about $1,966 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $437 saved annually, at this mileage.
Filling up the 2026 BMW i4 eDrive40 Gran Coupe (18 inch wheels), in dollars
At Hawaii's rate, fully covering this 2026 BMW i4 eDrive40 Gran Coupe (18 inch wheels)'s 333-mile EPA range costs about $43.65 (95 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 i4 eDrive40 Gran Coupe (18 inch wheels) in Hawaii ranks 19,576 for cost savings versus gas — 1 being the best deal nationally. Separately, the BMW i4 eDrive40 Gran Coupe (18 inch wheels) ranks 31 of 400 EV models for raw efficiency, and Hawaii ranks 51 of 51 for cheapest residential electricity.
Next step: home charger installation
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
See the methodology guide for exactly which EIA and EPA figures feed 2026 BMW i4 eDrive40 Gran Coupe (18 inch wheels)'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.