Charging a 2026 BMW i7 M70 xDrive Sedan (21 inch Wheels) at home in South Dakota
A 2026 BMW i7 M70 xDrive Sedan (21 inch Wheels) draws 42.5 kWh per 100 miles per the EPA; at South Dakota's 14.33¢/kWh residential rate that's $6.08 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. That works out to 62% cheaper per mile than gasoline in South Dakota — charging at home is much cheaper than gas here.
2026 BMW i7 M70 xDrive Sedan (21 inch Wheels): yearly cost in South Dakota
South Dakota owners putting 15,000 annual miles on a 2026 BMW i7 M70 xDrive Sedan (21 inch Wheels) spend about $912 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,490 saved annually, at this mileage.
What one full charge costs
At South Dakota's rate, fully covering this 2026 BMW i7 M70 xDrive Sedan (21 inch Wheels)'s 285-mile EPA range costs about $17.34 (121 kWh) — the energy the EPA test actually used, not the battery's rated size.
2026 BMW i7 M70 xDrive Sedan (21 inch Wheels) in South Dakota, ranked
Among all 20,400 state-and-model combinations this site tracks, charging a 2026 BMW i7 M70 xDrive Sedan (21 inch Wheels) in South Dakota ranks 9,837 for cost savings versus gas — 1 being the best deal nationally. Separately, the BMW i7 M70 xDrive Sedan (21 inch Wheels) ranks 310 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
Every figure on this page traces to a named EIA or EPA dataset — see the methodology guide. South Dakota's 14.33¢/kWh rate ranks 14 of 51 states; the state rate guide lays out the full spread.