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

A 2027 Audi A6 e-tron ultra draws 26.5 kWh per 100 miles per the EPA; at Idaho's 12.8¢/kWh residential rate that's $3.39 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. That works out to 78.9% cheaper per mile than gasoline in Idaho — charging at home costs a fraction of what gas would here.

Annual cost, at 15 thousands miles a year

Idaho owners putting 15,000 annual miles on a 2027 Audi A6 e-tron ultra spend about $508 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,895 saved annually, at this mileage.

Cost of a full charge

At Idaho's rate, fully covering this 2027 Audi A6 e-tron ultra's 395-mile EPA range costs about $13.38 (104.5 kWh) — the energy the EPA test actually used, not the battery's rated size.

2027 Audi A6 e-tron ultra in Idaho, ranked

Among all 20,400 state-and-model combinations this site tracks, charging a 2027 Audi A6 e-tron ultra in Idaho ranks 91 for cost savings versus gas — 1 being the best deal nationally. Separately, the Audi A6 e-tron ultra ranks 14 of 400 EV models for raw efficiency, and Idaho ranks 3 of 51 for cheapest residential electricity.

Next step: home charger installation

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 Idaho 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. Idaho is one of the cheapest states for home electricity — the guide to why the cost varies so much by state covers what drives that.