2026 Rivian R1T Performance Dual Large Plus (20in), ID…

Charging a 2026 Rivian R1T Performance Dual Large Plus (20in) at home in Idaho

In Idaho, home electricity runs 12.8¢/kWh, put a 2026 Rivian R1T Performance Dual Large Plus (20in)'s EPA-rated 43.1 kWh/100mi against that and 100 miles costs $5.52, versus $16.02 for a gas car averaging 25.5 mpg. That works out to 65.5% 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 Performance Dual Large Plus (20in) spend about $828 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,575 saved annually, at this mileage.

Cost of a full charge

At Idaho's rate, fully covering this 2026 Rivian R1T Performance Dual Large Plus (20in)'s 317-mile EPA range costs about $17.5 (136.7 kWh), the energy the EPA test actually used, not the battery's rated size.

How this compares nationally

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Rivian R1T Performance Dual Large Plus (20in) in Idaho ranks 7,112 for cost savings versus gas, 1 being the best deal nationally. Separately, the Rivian R1T Performance Dual Large Plus (20in) ranks 330 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.