Idaho home charging cost for the 2027 Rivian R1S Performance (20in AT)

A 2027 Rivian R1S Performance (20in AT) draws 49.8 kWh per 100 miles per the EPA; at Idaho's 12.8¢/kWh residential rate that's $6.38 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. Charging at home is much cheaper than gas here: 60.2% less than gas per mile, here specifically.

Annual cost, at 15 thousands miles a year

At fueleconomy.gov's default of 15,000 annual miles, the 2027 Rivian R1S Performance (20in AT) costs roughly $957 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 $1,446 a year.

What one full charge costs

Covering the 2027 Rivian R1S Performance (20in AT)'s EPA-rated 329-mile range takes about 164 kWh, which costs about $20.99 at Idaho's residential rate — figured from the EPA's own combined range and consumption numbers, not the pack's nameplate capacity.

2027 Rivian R1S Performance (20in AT) in Idaho, ranked

This combination ranks 10,958 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Performance (20in AT) alone ranks 386 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.

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

Where these figures come from

See the methodology guide for exactly which EIA and EPA figures feed 2027 Rivian R1S Performance (20in AT)'s cost in Idaho. 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.