What it costs to charge a 2026 Rivian R1S Tri Max (22in) in Wyoming

A 2026 Rivian R1S Tri Max (22in) draws 44.6 kWh per 100 miles per the EPA; at Wyoming's 13.88¢/kWh residential rate that's $6.19 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. That works out to 61.4% cheaper per mile than gasoline in Wyoming — charging at home is much cheaper than gas here.

What a year of driving costs

Home charging this 2026 Rivian R1S Tri Max (22in) in Wyoming runs about $928 over fueleconomy.gov's default 15,000 annual miles, versus about $2,403 for the gasoline equivalent. Call it about $1,475 saved annually, at this mileage.

What one full charge costs

$22.95 — that's what Wyoming's 13.88¢/kWh rate puts on the 165.4 kWh a 2026 Rivian R1S Tri Max (22in) needs for its full 371-mile EPA range.

Where this ranks

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Rivian R1S Tri Max (22in) in Wyoming ranks 10,321 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S Tri Max (22in) ranks 356 of 400 EV models for raw efficiency, and Wyoming ranks 12 of 51 for cheapest residential electricity.

Before you install a home charger in Wyoming

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

The methodology guide names the exact EIA and EPA tables behind this page's numbers. Curious how Wyoming's 13.88¢/kWh compares? The guide to charging cost by state ranks every state side by side.