Hawaii home charging cost for the 2027 Subaru Solterra 20 AWD

At Hawaii's residential electricity rate of 45.95¢/kWh, a 2027 Subaru Solterra 20 AWD (rated 28.9 kWh per 100 miles by the EPA) costs $13.29 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 is cheaper than gas here: 17% less than gas per mile, here specifically.

What a year of driving costs

At fueleconomy.gov's default of 15,000 annual miles, the 2027 Subaru Solterra 20 AWD costs roughly $1,993 a year to charge at home in Hawaii, against roughly $2,403 a year for an equivalent gas car. That's a savings of about $409 a year.

What one full charge costs

Covering the 2027 Subaru Solterra 20 AWD's EPA-rated 278-mile range takes about 80.4 kWh, which costs about $36.95 at Hawaii's residential rate — figured from the EPA's own combined range and consumption numbers, not the pack's nameplate capacity.

Where this ranks

This combination ranks 19,632 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Subaru Solterra 20 AWD alone ranks 35 of 400 models for efficiency; Hawaii alone ranks 51 of 51 states for electricity price.

Getting set up to charge a 2027 Subaru Solterra 20 AWD at home

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

Every figure on this page traces to a named EIA or EPA dataset — see the methodology guide. 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.