Montana home charging cost for the 2027 Audi S6 e-tron (20 inch wheels)

A 2027 Audi S6 e-tron (20 inch wheels) draws 32.7 kWh per 100 miles per the EPA; at Montana's 13.77¢/kWh residential rate that's $4.5 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: 71.9% less than gas per mile, here specifically.

What a year of driving costs

At fueleconomy.gov's default of 15,000 annual miles, the 2027 Audi S6 e-tron (20 inch wheels) costs roughly $675 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 $1,728 a year.

Cost of a full charge

Covering the 2027 Audi S6 e-tron (20 inch wheels)'s EPA-rated 326-mile range takes about 106.5 kWh, which costs about $14.66 at Montana's residential rate — figured from the EPA's own combined range and consumption numbers, not the pack's nameplate capacity.

How this compares nationally

This combination ranks 2,451 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Audi S6 e-tron (20 inch wheels) alone ranks 106 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

Every figure on this page traces to a named EIA or EPA dataset — see the methodology guide. Montana's 13.77¢/kWh rate ranks 10 of 51 states; the state rate guide lays out the full spread.