2027 BMW i7 xDrive50 Sedan (21 inch Summer Tires): home charging cost in Arizona

At Arizona's residential electricity rate of 15.45¢/kWh, a 2027 BMW i7 xDrive50 Sedan (21 inch Summer Tires) (rated 36.8 kWh per 100 miles by the EPA) costs $5.68 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. Charging at home is much cheaper than gas here: 64.5% less than gas per mile, here specifically.

What a year of driving costs

Driving 15,000 miles a year — fueleconomy.gov's own default assumption — a 2027 BMW i7 xDrive50 Sedan (21 inch Summer Tires) charged at home in Arizona costs about $852/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,551 a year.

Cost of a full charge

A 2027 BMW i7 xDrive50 Sedan (21 inch Summer Tires) needs roughly 133.8 kWh to reach its EPA-rated 364-mile range, which runs about $20.67 at 15.45¢/kWh in Arizona.

Where this ranks

This combination ranks 7,880 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The BMW i7 xDrive50 Sedan (21 inch Summer Tires) alone ranks 184 of 400 models for efficiency; Arizona alone ranks 25 of 51 states for electricity price.

Next step: home charger installation

The numbers above assume Level 2 home charging is already in place — the electrical work behind that is a real, separate cost that varies by panel, wiring, and local labor rates, not something this page's per-mile math includes.

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

Where these figures come from

The methodology guide names the exact EIA and EPA tables behind this page's numbers. At 15.45¢/kWh, Arizona sits in the middle of the national range — the guide to why charging cost varies by state shows where.