What it costs to charge a 2026 Rivian R1S Dual Max (22in) in Idaho

In Idaho, home electricity runs 12.8¢/kWh — put a 2026 Rivian R1S Dual Max (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. That works out to 68.1% cheaper per mile than gasoline in Idaho — charging at home costs a fraction of what gas would here.

2026 Rivian R1S Dual Max (22in): yearly cost in Idaho

Home charging this 2026 Rivian R1S Dual Max (22in) in Idaho runs about $767 over fueleconomy.gov's default 15,000 annual miles, versus about $2,403 for the gasoline equivalent. Call it about $1,636 saved annually, at this mileage.

What one full charge costs

$20.96 — that's what Idaho's 12.8¢/kWh rate puts on the 163.7 kWh a 2026 Rivian R1S Dual Max (22in) needs for its full 410-mile EPA range.

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

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Rivian R1S Dual Max (22in) in Idaho ranks 5,014 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S Dual Max (22in) ranks 265 of 400 EV models for raw efficiency, and Idaho ranks 3 of 51 for cheapest residential electricity.

Getting set up to charge a 2026 Rivian R1S Dual Max (22in) at home

Everything above is the per-mile and per-year cost once a home charger exists — getting one installed is a separate electrical job whose price depends on your panel and wiring, not the state average used here.

Line up a few Idaho electrician quotes for Level 2 install before you commit either way.

More on how this number was built

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.