2027 Rivian R1S Premium Long Range (20in): home charging cost in Idaho

In Idaho, home electricity runs 12.8¢/kWh — put a 2027 Rivian R1S Premium Long Range (20in)'s EPA-rated 42 kWh/100mi against that and 100 miles costs $5.37, versus $16.02 for a gas car averaging 25.5 mpg. Charging at home costs a fraction of what gas would here: 66.5% less than gas per mile, here specifically.

Annual cost, at 15 thousands miles a year

Driving 15,000 miles a year — fueleconomy.gov's own default assumption — a 2027 Rivian R1S Premium Long Range (20in) charged at home in Idaho costs about $806/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,597 a year.

Filling up the 2027 Rivian R1S Premium Long Range (20in), in dollars

A 2027 Rivian R1S Premium Long Range (20in) needs roughly 159.5 kWh to reach its EPA-rated 380-mile range, which runs about $20.42 at 12.8¢/kWh in Idaho.

2027 Rivian R1S Premium Long Range (20in) in Idaho, ranked

This combination ranks 6,284 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Premium Long Range (20in) alone ranks 296 of 400 models for efficiency; Idaho alone ranks 3 of 51 states for electricity price.

Getting set up to charge a 2027 Rivian R1S Premium Long Range (20in) 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.

Line up a few Idaho 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. 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.