2027 Rivian R1T Premium Long Range (22in): home charging cost in Montana

A 2027 Rivian R1T Premium Long Range (22in) draws 38.8 kWh per 100 miles per the EPA; at Montana's 13.77¢/kWh residential rate that's $5.35 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. Charging at home costs a fraction of what gas would here: 66.6% less than gas per mile, here specifically.

What a year of driving costs

Driving 15,000 miles a year — fueleconomy.gov's own default assumption — a 2027 Rivian R1T Premium Long Range (22in) charged at home in Montana costs about $802/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,601 a year.

Cost of a full charge

A 2027 Rivian R1T Premium Long Range (22in) needs roughly 163.1 kWh to reach its EPA-rated 420-mile range, which runs about $22.46 at 13.77¢/kWh in Montana.

2027 Rivian R1T Premium Long Range (22in) in Montana, ranked

This combination ranks 6,224 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1T Premium Long Range (22in) alone ranks 233 of 400 models for efficiency; Montana alone ranks 10 of 51 states for electricity price.

Getting set up to charge a 2027 Rivian R1T Premium Long Range (22in) at home

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.

Ask a licensed Montana electrician to quote the install before this math becomes a real decision.

Where these figures come from

Every figure on this page traces to a named EIA or EPA dataset — see the methodology guide. Curious how Montana's 13.77¢/kWh compares? The guide to charging cost by state ranks every state side by side.