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

A 2026 Audi Q4 45 e-tron draws 29.4 kWh per 100 miles per the EPA; at South Dakota's 14.33¢/kWh residential rate that's $4.21 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. That works out to 73.7% cheaper per mile than gasoline in South Dakota — charging at home costs a fraction of what gas would here.

What a year of driving costs

South Dakota owners putting 15,000 annual miles on a 2026 Audi Q4 45 e-tron spend about $632 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,771 saved annually, at this mileage.

What one full charge costs

At South Dakota's rate, fully covering this 2026 Audi Q4 45 e-tron's 288-mile EPA range costs about $12.13 (84.7 kWh) — the energy the EPA test actually used, not the battery's rated size.

2026 Audi Q4 45 e-tron in South Dakota, ranked

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Audi Q4 45 e-tron in South Dakota ranks 1,509 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 South Dakota ranks 14 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 South Dakota electrician quotes for Level 2 install before you commit either way.

More on how this number was built

The methodology guide names the exact EIA and EPA tables behind this page's numbers. South Dakota's 14.33¢/kWh rate ranks 14 of 51 states; the state rate guide lays out the full spread.