2026 Rivian R1S Dual Large Plus (22in): home charging cost in Montana

A 2026 Rivian R1S Dual Large Plus (22in) draws 40.9 kWh per 100 miles per the EPA; at Montana's 13.77¢/kWh residential rate that's $5.63 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: 64.8% less than gas per mile, here specifically.

2026 Rivian R1S Dual Large Plus (22in): yearly cost in Montana

Driving 15,000 miles a year — fueleconomy.gov's own default assumption — a 2026 Rivian R1S Dual Large Plus (22in) charged at home in Montana costs about $845/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,558 a year.

Filling up the 2026 Rivian R1S Dual Large Plus (22in), in dollars

A 2026 Rivian R1S Dual Large Plus (22in) needs roughly 135 kWh to reach its EPA-rated 330-mile range, which runs about $18.59 at 13.77¢/kWh in Montana.

2026 Rivian R1S Dual Large Plus (22in) in Montana, ranked

This combination ranks 7,632 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Dual Large Plus (22in) alone ranks 278 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

See the methodology guide for exactly which EIA and EPA figures feed 2026 Rivian R1S Dual Large Plus (22in)'s cost in Montana. At 13.77¢/kWh, Montana sits in the middle of the national range — the guide to why charging cost varies by state shows where.