2026 BMW i7 eDrive50 Sedan (21 inch Wheels): home charging cost in Massachusetts

At Massachusetts's residential electricity rate of 30.06¢/kWh, a 2026 BMW i7 eDrive50 Sedan (21 inch Wheels) (rated 38.9 kWh per 100 miles by the EPA) costs $11.71 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 cheaper than gas here: 26.9% 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 2026 BMW i7 eDrive50 Sedan (21 inch Wheels) charged at home in Massachusetts costs about $1,756/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $647 a year.

Cost of a full charge

A 2026 BMW i7 eDrive50 Sedan (21 inch Wheels) needs roughly 119.6 kWh to reach its EPA-rated 307-mile range, which runs about $35.94 at 30.06¢/kWh in Massachusetts.

How this compares nationally

This combination ranks 18,837 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The BMW i7 eDrive50 Sedan (21 inch Wheels) alone ranks 236 of 400 models for efficiency; Massachusetts alone ranks 49 of 51 states for electricity price.

Getting set up to charge a 2026 BMW i7 eDrive50 Sedan (21 inch Wheels) at home

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.

Line up a few Massachusetts electrician quotes for Level 2 install before you commit either way.

Where these figures come from

Every figure on this page traces to a named EIA or EPA dataset — see the methodology guide. Massachusetts has some of the highest residential electricity rates in the country — see the guide to why the cost varies so much by state for the full picture.