Washington home charging cost for the 2026 BMW i7 M70 xDrive Sedan (20 inch Wheels)

A 2026 BMW i7 M70 xDrive Sedan (20 inch Wheels) draws 45.1 kWh per 100 miles per the EPA; at Washington's 14.35¢/kWh residential rate that's $6.47 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: 59.6% less than gas per mile, here specifically.

What a year of driving costs

At fueleconomy.gov's default of 15,000 annual miles, the 2026 BMW i7 M70 xDrive Sedan (20 inch Wheels) costs roughly $970 a year to charge at home in Washington, against roughly $2,403 a year for an equivalent gas car. That's a savings of about $1,433 a year.

What one full charge costs

Covering the 2026 BMW i7 M70 xDrive Sedan (20 inch Wheels)'s EPA-rated 267-mile range takes about 120.3 kWh, which costs about $17.26 at Washington's residential rate — figured from the EPA's own combined range and consumption numbers, not the pack's nameplate capacity.

Where this ranks

This combination ranks 11,364 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The BMW i7 M70 xDrive Sedan (20 inch Wheels) alone ranks 360 of 400 models for efficiency; Washington alone ranks 15 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.

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

Where these figures come from

The methodology guide names the exact EIA and EPA tables behind this page's numbers. Curious how Washington's 14.35¢/kWh compares? The guide to charging cost by state ranks every state side by side.