Charging a 2026 BMW i7 M70 xDrive Sedan (21 inch Wheels) at home in Arizona

In Arizona, home electricity runs 15.45¢/kWh — put a 2026 BMW i7 M70 xDrive Sedan (21 inch Wheels)'s EPA-rated 42.5 kWh/100mi against that and 100 miles costs $6.56, versus $16.02 for a gas car averaging 25.5 mpg. That works out to 59.1% cheaper per mile than gasoline in Arizona — charging at home is much cheaper than gas here.

What a year of driving costs

Arizona owners putting 15,000 annual miles on a 2026 BMW i7 M70 xDrive Sedan (21 inch Wheels) spend about $984 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,419 saved annually, at this mileage.

Filling up the 2026 BMW i7 M70 xDrive Sedan (21 inch Wheels), in dollars

At Arizona's rate, fully covering this 2026 BMW i7 M70 xDrive Sedan (21 inch Wheels)'s 285-mile EPA range costs about $18.69 (121 kWh) — the energy the EPA test actually used, not the battery's rated size.

How this compares nationally

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 BMW i7 M70 xDrive Sedan (21 inch Wheels) in Arizona ranks 11,606 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 Arizona ranks 25 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.

Ask a licensed Arizona 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. At 15.45¢/kWh, Arizona sits in the middle of the national range — the guide to why charging cost varies by state shows where.