Idaho home charging cost for the 2027 Rivian R1S Premium Long Range (22in)

A 2027 Rivian R1S Premium Long Range (22in) draws 39.9 kWh per 100 miles per the EPA; at Idaho's 12.8¢/kWh residential rate that's $5.11 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. Charging at home costs a fraction of what gas would here: 68.1% 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 Rivian R1S Premium Long Range (22in) costs roughly $767 a year to charge at home in Idaho, against roughly $2,403 a year for an equivalent gas car. That's a savings of about $1,636 a year.

Cost of a full charge

Covering the 2027 Rivian R1S Premium Long Range (22in)'s EPA-rated 410-mile range takes about 163.7 kWh, which costs about $20.96 at Idaho'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 5,012 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Premium Long Range (22in) alone ranks 264 of 400 models for efficiency; Idaho alone ranks 3 of 51 states for electricity price.

Before you install a home charger in Idaho

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 Idaho before deciding.

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.