Charging a 2027 Cadillac OPTIQ RWD 19kW Charger at home in Montana

At Montana's residential electricity rate of 13.77¢/kWh, a 2027 Cadillac OPTIQ RWD 19kW Charger (rated 32.1 kWh per 100 miles by the EPA) costs $4.42 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 72.4% 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 2027 Cadillac OPTIQ RWD 19kW Charger spend about $663 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,740 saved annually, at this mileage.

Cost of a full charge

At Montana's rate, fully covering this 2027 Cadillac OPTIQ RWD 19kW Charger's 317-mile EPA range costs about $14 (101.7 kWh) — the energy the EPA test actually used, not the battery's rated size.

Where this ranks

Among all 20,400 state-and-model combinations this site tracks, charging a 2027 Cadillac OPTIQ RWD 19kW Charger in Montana ranks 2,131 for cost savings versus gas — 1 being the best deal nationally. Separately, the Cadillac OPTIQ RWD 19kW Charger ranks 89 of 400 EV models for raw efficiency, and Montana ranks 10 of 51 for cheapest residential electricity.

Before you install a home charger in Montana

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.

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

More on how this number was built

The methodology guide names the exact EIA and EPA tables behind this page's numbers. At 13.77¢/kWh, Montana sits in the middle of the national range — the guide to why charging cost varies by state shows where.