2026 BMW i7 M70 xDrive Sedan (21 inch Wheels): home charging cost in Wisconsin

A 2026 BMW i7 M70 xDrive Sedan (21 inch Wheels) draws 42.5 kWh per 100 miles per the EPA; at Wisconsin's 18.99¢/kWh residential rate that's $8.06 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. Charging at home is much cheaper than gas here: 49.7% 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 M70 xDrive Sedan (21 inch Wheels) charged at home in Wisconsin costs about $1,209/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,194 a year.

Cost of a full charge

A 2026 BMW i7 M70 xDrive Sedan (21 inch Wheels) needs roughly 121 kWh to reach its EPA-rated 285-mile range, which runs about $22.97 at 18.99¢/kWh in Wisconsin.

2026 BMW i7 M70 xDrive Sedan (21 inch Wheels) in Wisconsin, ranked

This combination ranks 15,175 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The BMW i7 M70 xDrive Sedan (21 inch Wheels) alone ranks 310 of 400 models for efficiency; Wisconsin alone ranks 35 of 51 states for electricity price.

Before you install a home charger in Wisconsin

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.

Get quotes from local electricians for Level 2 charger installation in Wisconsin before deciding.

Where these figures come from

The methodology guide names the exact EIA and EPA tables behind this page's numbers. At 18.99¢/kWh, Wisconsin sits in the middle of the national range — the guide to why charging cost varies by state shows where.