Charging a 2026 Volvo EX30 Twin Performance at home in Montana

At Montana's residential electricity rate of 13.77¢/kWh, a 2026 Volvo EX30 Twin Performance (rated 31.1 kWh per 100 miles by the EPA) costs $4.28 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. That works out to 73.3% cheaper per mile than gasoline in Montana — charging at home costs a fraction of what gas would here.

Annual cost, at 15 thousands miles a year

Montana owners putting 15,000 annual miles on a 2026 Volvo EX30 Twin Performance spend about $642 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,761 saved annually, at this mileage.

Cost of a full charge

At Montana's rate, fully covering this 2026 Volvo EX30 Twin Performance's 253-mile EPA range costs about $10.82 (78.6 kWh) — the energy the EPA test actually used, not the battery's rated size.

How this compares nationally

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Volvo EX30 Twin Performance in Montana ranks 1,662 for cost savings versus gas — 1 being the best deal nationally. Separately, the Volvo EX30 Twin Performance ranks 74 of 400 EV models for raw efficiency, and Montana ranks 10 of 51 for cheapest residential electricity.

Next step: home charger installation

Everything above is the per-mile and per-year cost once a home charger exists — getting one installed is a separate electrical job whose price depends on your panel and wiring, not the state average used here.

Ask a licensed Montana electrician to quote the install before this math becomes a real decision.

More on how this number was built

See the methodology guide for exactly which EIA and EPA figures feed 2026 Volvo EX30 Twin Performance's cost in Montana. Montana's 13.77¢/kWh rate ranks 10 of 51 states; the state rate guide lays out the full spread.