2026 Rivian R1S Dual Standard (22in): home charging cost in Idaho

In Idaho, home electricity runs 12.8¢/kWh — put a 2026 Rivian R1S Dual Standard (22in)'s EPA-rated 39.9 kWh/100mi against that and 100 miles costs $5.11, versus $16.02 for a gas car averaging 25.5 mpg. Charging at home costs a fraction of what gas would here: 68.1% 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 2026 Rivian R1S Dual Standard (22in) charged at home in Idaho costs about $766/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,637 a year.

Cost of a full charge

A 2026 Rivian R1S Dual Standard (22in) needs roughly 107.7 kWh to reach its EPA-rated 270-mile range, which runs about $13.78 at 12.8¢/kWh in Idaho.

2026 Rivian R1S Dual Standard (22in) in Idaho, ranked

This combination ranks 5,015 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Dual Standard (22in) alone ranks 262 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

See the methodology guide for exactly which EIA and EPA figures feed 2026 Rivian R1S Dual Standard (22in)'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.