Charging a 2027 Audi A6 e-tron quattro ultra at home in Montana

A 2027 Audi A6 e-tron quattro ultra draws 28.7 kWh per 100 miles per the EPA; at Montana's 13.77¢/kWh residential rate that's $3.96 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. That works out to 75.3% cheaper per mile than gasoline in Montana — charging at home costs a fraction of what gas would here.

2027 Audi A6 e-tron quattro ultra: yearly cost in Montana

Montana owners putting 15,000 annual miles on a 2027 Audi A6 e-tron quattro ultra spend about $594 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,809 saved annually, at this mileage.

Cost of a full charge

At Montana's rate, fully covering this 2027 Audi A6 e-tron quattro ultra's 360-mile EPA range costs about $14.25 (103.5 kWh) — the energy the EPA test actually used, not the battery's rated size.

How this compares nationally

Among all 20,400 state-and-model combinations this site tracks, charging a 2027 Audi A6 e-tron quattro ultra in Montana ranks 829 for cost savings versus gas — 1 being the best deal nationally. Separately, the Audi A6 e-tron quattro ultra ranks 33 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 A6 e-tron quattro ultra 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.

Get quotes from local electricians for Level 2 charger installation in Montana before deciding.

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.