Wyoming home charging cost for the 2026 Rivian R1S Performance Dual Large (20in)

A 2026 Rivian R1S Performance Dual Large (20in) draws 42.9 kWh per 100 miles per the EPA; at Wyoming's 13.88¢/kWh residential rate that's $5.95 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. Charging at home is much cheaper than gas here: 62.9% less than gas per mile, here specifically.

What a year of driving costs

At fueleconomy.gov's default of 15,000 annual miles, the 2026 Rivian R1S Performance Dual Large (20in) costs roughly $893 a year to charge at home in Wyoming, against roughly $2,403 a year for an equivalent gas car. That's a savings of about $1,510 a year.

Filling up the 2026 Rivian R1S Performance Dual Large (20in), in dollars

Covering the 2026 Rivian R1S Performance Dual Large (20in)'s EPA-rated 300-mile range takes about 128.6 kWh, which costs about $17.85 at Wyoming's residential rate — figured from the EPA's own combined range and consumption numbers, not the pack's nameplate capacity.

How this compares nationally

This combination ranks 9,173 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Performance Dual Large (20in) alone ranks 317 of 400 models for efficiency; Wyoming alone ranks 12 of 51 states for electricity price.

Next step: home charger installation

The numbers above assume Level 2 home charging is already in place — the electrical work behind that is a real, separate cost that varies by panel, wiring, and local labor rates, not something this page's per-mile math includes.

Line up a few Wyoming electrician quotes for Level 2 install before you commit either way.

Where these figures come from

See the methodology guide for exactly which EIA and EPA figures feed 2026 Rivian R1S Performance Dual Large (20in)'s cost in Wyoming. Wyoming's 13.88¢/kWh rate ranks 12 of 51 states; the state rate guide lays out the full spread.