Charging a 2026 Rivian R1T Dual Large (22in) at home in Idaho

In Idaho, home electricity runs 12.8¢/kWh — put a 2026 Rivian R1T Dual Large (22in)'s EPA-rated 39.5 kWh/100mi against that and 100 miles costs $5.05, versus $16.02 for a gas car averaging 25.5 mpg. That works out to 68.5% cheaper per mile than gasoline in Idaho — charging at home costs a fraction of what gas would here.

Annual cost, at 15 thousands miles a year

Idaho owners putting 15,000 annual miles on a 2026 Rivian R1T Dual Large (22in) spend about $758 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,645 saved annually, at this mileage.

Filling up the 2026 Rivian R1T Dual Large (22in), in dollars

At Idaho's rate, fully covering this 2026 Rivian R1T Dual Large (22in)'s 329-mile EPA range costs about $16.62 (129.9 kWh) — the energy the EPA test actually used, not the battery's rated size.

Where this ranks

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Rivian R1T Dual Large (22in) in Idaho ranks 4,721 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1T Dual Large (22in) ranks 252 of 400 EV models for raw efficiency, and Idaho ranks 3 of 51 for cheapest residential electricity.

Next step: home charger installation

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.

Get quotes from local electricians for Level 2 charger installation in Idaho before deciding.

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.