Charging a 2026 Rivian R1T Dual Standard (20in) at home in Idaho

At Idaho's residential electricity rate of 12.8¢/kWh, a 2026 Rivian R1T Dual Standard (20in) (rated 42.9 kWh per 100 miles by the EPA) costs $5.49 to drive 100 miles on home charging, against $16.02 for the same distance in a car averaging 25.5 mpg on gasoline at $4.085/gallon. That works out to 65.7% cheaper per mile than gasoline in Idaho — charging at home costs a fraction of what gas would here.

What a year of driving costs

Idaho owners putting 15,000 annual miles on a 2026 Rivian R1T Dual Standard (20in) spend about $823 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,580 saved annually, at this mileage.

What one full charge costs

At Idaho's rate, fully covering this 2026 Rivian R1T Dual Standard (20in)'s 258-mile EPA range costs about $14.16 (110.6 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 Standard (20in) in Idaho ranks 6,928 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1T Dual Standard (20in) ranks 313 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

See the methodology guide for exactly which EIA and EPA figures feed 2026 Rivian R1T Dual Standard (20in)'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.