What it costs to charge a 2026 Rivian R1T Dual Max (20in) in Montana

A 2026 Rivian R1T Dual Max (20in) draws 42 kWh per 100 miles per the EPA; at Montana's 13.77¢/kWh residential rate that's $5.78 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. That works out to 63.9% cheaper per mile than gasoline in Montana — charging at home is much cheaper than gas here.

Annual cost, at 15 thousands miles a year

Home charging this 2026 Rivian R1T Dual Max (20in) in Montana runs about $867 over fueleconomy.gov's default 15,000 annual miles, versus about $2,403 for the gasoline equivalent. Call it about $1,536 saved annually, at this mileage.

Cost of a full charge

$21.96 — that's what Montana's 13.77¢/kWh rate puts on the 159.5 kWh a 2026 Rivian R1T Dual Max (20in) needs for its full 380-mile EPA range.

How this compares nationally

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Rivian R1T Dual Max (20in) in Montana ranks 8,405 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1T Dual Max (20in) ranks 300 of 400 EV models for raw efficiency, and Montana ranks 10 of 51 for cheapest residential electricity.

Before you install a home charger in Montana

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 Montana electrician quotes for Level 2 install before you commit either way.

More on how this number was built

See the methodology guide for exactly which EIA and EPA figures feed 2026 Rivian R1T Dual Max (20in)'s cost in Montana. Montana's 13.77¢/kWh rate ranks 10 of 51 states; the state rate guide lays out the full spread.