What it costs to charge a 2026 BMW i7 M70 xDrive Sedan (21 inch Wheels) in Tennessee

At Tennessee's residential electricity rate of 13.9¢/kWh, a 2026 BMW i7 M70 xDrive Sedan (21 inch Wheels) (rated 42.5 kWh per 100 miles by the EPA) costs $5.9 to drive 100 miles on home charging, against $16.02 for the same distance in a car averaging 25.5 mpg on gasoline at $4.085/gallon. That works out to 63.2% cheaper per mile than gasoline in Tennessee — charging at home is much cheaper than gas here.

2026 BMW i7 M70 xDrive Sedan (21 inch Wheels): yearly cost in Tennessee

Home charging this 2026 BMW i7 M70 xDrive Sedan (21 inch Wheels) in Tennessee runs about $885 over fueleconomy.gov's default 15,000 annual miles, versus about $2,403 for the gasoline equivalent. Call it about $1,518 saved annually, at this mileage.

What one full charge costs

$16.82 — that's what Tennessee's 13.9¢/kWh rate puts on the 121 kWh a 2026 BMW i7 M70 xDrive Sedan (21 inch Wheels) needs for its full 285-mile EPA range.

Where this ranks

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 BMW i7 M70 xDrive Sedan (21 inch Wheels) in Tennessee ranks 8,924 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 Tennessee ranks 13 of 51 for cheapest residential electricity.

Before you install a home charger in Tennessee

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.

Ask a licensed Tennessee electrician to quote the install before this math becomes a real decision.

More on how this number was built

Every figure on this page traces to a named EIA or EPA dataset — see the methodology guide. Tennessee's 13.9¢/kWh rate ranks 13 of 51 states; the state rate guide lays out the full spread.