2026 BMW i4 eDrive40 Gran Coupe (19 inch Wheels): home charging cost in Idaho

A 2026 BMW i4 eDrive40 Gran Coupe (19 inch Wheels) draws 31.1 kWh per 100 miles per the EPA; at Idaho's 12.8¢/kWh residential rate that's $3.98 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. Charging at home costs a fraction of what gas would here: 75.2% less than gas per mile, here specifically.

Annual cost, at 15 thousands miles a year

Driving 15,000 miles a year — fueleconomy.gov's own default assumption — a 2026 BMW i4 eDrive40 Gran Coupe (19 inch Wheels) charged at home in Idaho costs about $597/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,806 a year.

Filling up the 2026 BMW i4 eDrive40 Gran Coupe (19 inch Wheels), in dollars

A 2026 BMW i4 eDrive40 Gran Coupe (19 inch Wheels) needs roughly 95.5 kWh to reach its EPA-rated 307-mile range, which runs about $12.22 at 12.8¢/kWh in Idaho.

How this compares nationally

This combination ranks 865 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The BMW i4 eDrive40 Gran Coupe (19 inch Wheels) alone ranks 77 of 400 models for efficiency; Idaho alone ranks 3 of 51 states for electricity price.

Before you install a home charger in Idaho

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 Idaho before deciding.

Where these figures come from

Every figure on this page traces to a named EIA or EPA dataset — see the methodology guide. Idaho is one of the cheapest states for home electricity — the guide to why the cost varies so much by state covers what drives that.