Charging a 2026 Audi Q4 45 e-tron at home in Montana

In Montana, home electricity runs 13.77¢/kWh — put a 2026 Audi Q4 45 e-tron's EPA-rated 29.4 kWh/100mi against that and 100 miles costs $4.05, versus $16.02 for a gas car averaging 25.5 mpg. That works out to 74.7% cheaper per mile than gasoline in Montana — charging at home costs a fraction of what gas would here.

2026 Audi Q4 45 e-tron: yearly cost in Montana

Montana owners putting 15,000 annual miles on a 2026 Audi Q4 45 e-tron spend about $607 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,796 saved annually, at this mileage.

What one full charge costs

At Montana's rate, fully covering this 2026 Audi Q4 45 e-tron's 288-mile EPA range costs about $11.66 (84.7 kWh) — the energy the EPA test actually used, not the battery's rated size.

2026 Audi Q4 45 e-tron in Montana, ranked

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Audi Q4 45 e-tron in Montana ranks 1,072 for cost savings versus gas — 1 being the best deal nationally. Separately, the Audi Q4 45 e-tron ranks 48 of 400 EV models for raw efficiency, and Montana ranks 10 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.

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

More on how this number was built

The methodology guide names the exact EIA and EPA tables behind this page's numbers. Montana's 13.77¢/kWh rate ranks 10 of 51 states; the state rate guide lays out the full spread.