2026 Rivian R1T Performance Dual Max (20in): home charging cost in Montana

A 2026 Rivian R1T Performance 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. Charging at home is much cheaper than gas here: 63.9% 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 2026 Rivian R1T Performance Dual Max (20in) charged at home in Montana costs about $867/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,536 a year.

Cost of a full charge

A 2026 Rivian R1T Performance Dual Max (20in) needs roughly 159.5 kWh to reach its EPA-rated 380-mile range, which runs about $21.96 at 13.77¢/kWh in Montana.

How this compares nationally

This combination ranks 8,406 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1T Performance Dual Max (20in) alone ranks 301 of 400 models for efficiency; Montana alone ranks 10 of 51 states for electricity price.

Before you install a home charger in Montana

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.