2027 Subaru Solterra 20 AWD, ID Charging Cost

2027 Subaru Solterra 20 AWD: home charging cost in Idaho

At Idaho's residential electricity rate of 12.8¢/kWh, a 2027 Subaru Solterra 20 AWD (rated 28.9 kWh per 100 miles by the EPA) costs $3.7 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 costs a fraction of what gas would here: 76.9% less than gas per mile, here specifically.

What a year of driving costs

Driving 15,000 miles a year, fueleconomy.gov's own default assumption, a 2027 Subaru Solterra 20 AWD charged at home in Idaho costs about $555/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,848 a year.

What one full charge costs

A 2027 Subaru Solterra 20 AWD needs roughly 80.4 kWh to reach its EPA-rated 278-mile range, which runs about $10.29 at 12.8¢/kWh in Idaho.

How this compares nationally

This combination ranks 385 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; Idaho alone ranks 3 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.

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

Where these figures come from

Every figure on this page traces to a named EIA or EPA dataset, see the methodology guide. Idaho is one of the cheapest states for home electricity, the guide to why the cost varies so much by state covers what drives that.