2027 Volvo EX90 Twin Motor: home charging cost in Montana

At Montana's residential electricity rate of 13.77¢/kWh, a 2027 Volvo EX90 Twin Motor (rated 39 kWh per 100 miles by the EPA) costs $5.37 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 costs a fraction of what gas would here: 66.5% 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 Volvo EX90 Twin Motor charged at home in Montana costs about $806/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,597 a year.

Filling up the 2027 Volvo EX90 Twin Motor, in dollars

A 2027 Volvo EX90 Twin Motor needs roughly 117 kWh to reach its EPA-rated 300-mile range, which runs about $16.11 at 13.77¢/kWh in Montana.

Where this ranks

This combination ranks 6,312 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Volvo EX90 Twin Motor alone ranks 238 of 400 models for efficiency; Montana alone ranks 10 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.

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

Where these figures come from

The methodology guide names the exact EIA and EPA tables behind this page's numbers. Curious how Montana's 13.77¢/kWh compares? The guide to charging cost by state ranks every state side by side.