Montana home charging cost for the 2026 Rivian R1T All-Terrain Performance Dual Large Plus (20in)

At Montana's residential electricity rate of 13.77¢/kWh, a 2026 Rivian R1T All-Terrain Performance Dual Large Plus (20in) (rated 46.9 kWh per 100 miles by the EPA) costs $6.46 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. Charging at home is much cheaper than gas here: 59.7% 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 R1T All-Terrain Performance Dual Large Plus (20in) costs roughly $968 a year to charge at home in Montana, against roughly $2,403 a year for an equivalent gas car. That's a savings of about $1,434 a year.

Cost of a full charge

Covering the 2026 Rivian R1T All-Terrain Performance Dual Large Plus (20in)'s EPA-rated 292-mile range takes about 136.9 kWh, which costs about $18.85 at Montana's residential rate — figured from the EPA's own combined range and consumption numbers, not the pack's nameplate capacity.

Where this ranks

This combination ranks 11,312 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1T All-Terrain Performance Dual Large Plus (20in) alone ranks 368 of 400 models for efficiency; Montana alone ranks 10 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.

Get quotes from local electricians for Level 2 charger installation in Montana before deciding.

Where these figures come from

The methodology guide names the exact EIA and EPA tables behind this page's numbers. At 13.77¢/kWh, Montana sits in the middle of the national range — the guide to why charging cost varies by state shows where.