What it costs to charge a 2027 Audi S e-tron GT (21 inch wheels) in Montana

A 2027 Audi S e-tron GT (21 inch wheels) draws 38.5 kWh per 100 miles per the EPA; at Montana's 13.77¢/kWh residential rate that's $5.3 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. That works out to 66.9% cheaper per mile than gasoline in Montana — charging at home costs a fraction of what gas would here.

Annual cost, at 15 thousands miles a year

Home charging this 2027 Audi S e-tron GT (21 inch wheels) in Montana runs about $795 over fueleconomy.gov's default 15,000 annual miles, versus about $2,403 for the gasoline equivalent. Call it about $1,608 saved annually, at this mileage.

Cost of a full charge

$15.59 — that's what Montana's 13.77¢/kWh rate puts on the 113.2 kWh a 2027 Audi S e-tron GT (21 inch wheels) needs for its full 294-mile EPA range.

Where this ranks

Among all 20,400 state-and-model combinations this site tracks, charging a 2027 Audi S e-tron GT (21 inch wheels) in Montana ranks 5,975 for cost savings versus gas — 1 being the best deal nationally. Separately, the Audi S e-tron GT (21 inch wheels) ranks 226 of 400 EV models for raw efficiency, and Montana ranks 10 of 51 for cheapest residential electricity.

Getting set up to charge a 2027 Audi S e-tron GT (21 inch wheels) at home

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

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.