Charging a 2026 Rivian R1S Dual Large (20in) at home in Wyoming

At Wyoming's residential electricity rate of 13.88¢/kWh, a 2026 Rivian R1S Dual Large (20in) (rated 42.9 kWh per 100 miles by the EPA) costs $5.95 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 62.9% cheaper per mile than gasoline in Wyoming — charging at home is much cheaper than gas here.

Annual cost, at 15 thousands miles a year

Wyoming owners putting 15,000 annual miles on a 2026 Rivian R1S Dual Large (20in) spend about $893 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,510 saved annually, at this mileage.

Cost of a full charge

At Wyoming's rate, fully covering this 2026 Rivian R1S Dual Large (20in)'s 300-mile EPA range costs about $17.85 (128.6 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 R1S Dual Large (20in) in Wyoming ranks 9,171 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S Dual Large (20in) ranks 316 of 400 EV models for raw efficiency, and Wyoming ranks 12 of 51 for cheapest residential electricity.

Getting set up to charge a 2026 Rivian R1S Dual Large (20in) 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 Wyoming 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. At 13.88¢/kWh, Wyoming sits in the middle of the national range — the guide to why charging cost varies by state shows where.