How Much Does It Cost to Charge a BMW i7 in Montana?

Quick Answer

Charging a 2026 BMW i7 at home in Montana costs approximately $50/month — that's $0.050/mile and saves $986/year compared to a 28 MPG gas car at Montana's gas price of $3.70/gallon.

Sedans offer excellent aerodynamics and some of the highest efficiency ratings in the EV market, making them among the most cost-effective EVs to run daily. Cold weather reduces EV range by 20–40% as the battery heats itself and the cabin. Use scheduled departure to pre-heat on shore power before driving.

Cost per Mile

$0.050

home charging

Monthly Cost

$50

1,000 miles/month

Annual Savings

$986

vs. 28 MPG gas car

About the 2026 BMW i7

The BMW i7 is the electric flagship — the electric version of the 7 Series limousine that has defined executive travel for decades. With up to 105 kWh of battery, a 31.3" Theater Screen for rear passengers, and 318 miles of range, it defines EV luxury.

Advantages

✓31.3" rear Theatre Screen transforms rear-seat passenger experience

✓Class-defining interior craftsmanship and material quality

✓Available as M70 xDrive with 660 hp

✓Standard driving assistance and semi-automated parking

Considerations

✗$106,900+ price requires justification beyond performance alone

✗2.6 mi/kWh efficiency reflects its limousine weight and size

✗Large exterior dimensions limit urban maneuverability

✗195 kW charging is somewhat modest given the price tier

Ideal Buyer

C-suite executives who want the world's best rear-seat EV experience. BMW 7 Series loyalists moving to electric. Buyers for whom the Theatre Screen and massaging seats are genuine requirements.

vs. Gas Equivalent

Direct EV replacement of the BMW 7 Series 740i/750i. Gas equivalent is approximately 22–25 MPG for comparable luxury limousines.

BMW i7 Charging Cost Breakdown in Montana

Montana's electricity rate of $0.13/kWh is below the national average of $0.17/kWh. At this rate, the BMW i7's 105 kWh battery costs $13.65 for a full charge — a meaningful savings versus gas at current prices.

Charging Method

$/kWh

$/month

$/year

🏠 Home (Level 2)

$0.13

$50

$600

🔌 Public Level 2

$0.23

$90

$1,080

⚡ DC Fast Charger

$0.49

$188

$2,262

⛽ Gasoline (28 MPG)

$3.70/gal

$132

$1,586

Based on 1,000 miles/month. Public L2 estimated at 1.8× home rate. DC fast charging at national average of $0.49/kWh.

2026 BMW i7Specs & Charging Data

195 kW DC fast charging on a 105 kWh battery. Level 2 at home (11 kW AC onboard) fully charges in approximately 8.5 hours. 10–80% DC fast charge takes approximately 34 minutes.

Battery

105 kWh

EPA Range

318 miles

Efficiency

2.6 mi/kWh

kWh/100 miles

38.5 kWh

DC Fast Charge

195 kW max

10–80% Time

~32 min

Body Type

Sedan

MSRP

$106,900

Full Charge Cost

$13.65

EV Ownership in Montana

Montana has low EV adoption due to its vast rural geography and limited charging infrastructure. Billings, Missoula, and Bozeman are the primary markets. The state's scenic driving routes and outdoor culture are increasingly attracting EV road-trippers.

Incentives & Programs

Montana has no state EV tax credit. Federal incentives apply. NorthWestern Energy offers no dedicated EV rate plans currently, though this may change as the market grows.

Charging Infrastructure

I-90 and I-15 corridors have sparse DCFC coverage. Billings, Missoula, and Bozeman have limited urban charging. Gaps of 100+ miles exist on many Montana routes — this is one of the most challenging EV states for long-distance driving.

Grid & Energy Source

Montana's grid is roughly 60% hydro and 30% coal — an unusual mix. The hydro-heavy portion makes Montana's EV charging fairly clean, though the coal-heavy Billings area is somewhat less so.

MontanaElectricity Rates & EV Savings

The average residential electricity rate in Montana is $0.13/kWh, which is below the national average of $0.17/kWh. With a gas price of $3.70/gallon, Montana ranks as a favorable state for EV ownership.

Cold weather reduces EV range by 20–40% as the battery heats itself and the cabin. Use scheduled departure to pre-heat on shore power before driving. Your BMW i7's 105 kWh battery provides up to 318 miles of EPA-rated range. Real-world range may vary by 10–30% depending on temperature, speed, and terrain.

Annual EV Cost (home)

$600

BMW i7 @ $0.13/kWh

Annual Gas Cost (28 MPG)

$1,586

@ $3.70/gallon in Montana

You save every year by driving electric in Montana

$986/year

That's $82/month saved vs. a 28 MPG gas car

Home vs. DC Fast Charging in Montana

Monthly cost comparison for 1,000 miles in a BMW i7:

🏠 Home L2

$50

$50/mo

🔌 Public L2

$90

$90/mo

⚡ DC Fast

$188

$188/mo

⛽ Gasoline

$132

$132/mo

Tips for Charging Your BMW i7 in Montana

Montana's cold climate and charging infrastructure have specific implications for BMW i7 owners. Here are practical tips to maximize range and minimize charging costs in this state:

Montana's charging gaps are real — use A Better Routeplanner (ABRP) to map your entire Montana route before departure.

Glacier and Yellowstone access roads have limited charging. Plan to arrive with a near-full charge.

Montana's winters are severe: -20°F is not uncommon. Range can drop 40–50% in extreme cold — treat the battery like a critical resource.

Bozeman is the most EV-friendly city in Montana, with growing Tesla and third-party infrastructure.

Frequently Asked Questions

How much does it cost to charge a BMW i7 at home in Montana?

At Montana's average residential rate of $0.13/kWh, charging a 2026 BMW i7 at home costs approximately $50/month based on 1,000 miles of driving. A full charge costs $13.65.

How much does it cost to fully charge a BMW i7?

A full charge of the BMW i7's 105 kWh battery costs $13.65 at Montana's rate of $0.13/kWh. At a public DC fast charger ($0.49/kWh), that's about $51.45.

Is it cheaper to charge a BMW i7 or drive a gas car in Montana?

Home charging the BMW i7 in Montana costs $0.050/mile. A comparable 28 MPG gas car costs $0.13/mile at Montana's gas price of $3.70/gallon. EVs save approximately $986/year.

How long does it take to charge a BMW i7 with DC fast charging?

The BMW i7 supports up to 195 kW DC fast charging. A 10–80% charge takes approximately 32 minutes at peak speed. Actual time varies by charger capacity, battery temperature, and current state of charge.

How much does a BMW i7 add to your electric bill in Montana?

Driving 1,000 miles/month in a BMW i7 adds about $50 to your monthly electric bill in Montana. That's 38.5 kWh per 100 miles × $0.13/kWh.

How does cold weather in Montana affect BMW i7 range?

Cold winters in Montana can reduce BMW i7 range by 20–40%. With a 105 kWh battery and 318-mile EPA range, plan for 223–254 miles in cold conditions. Use the scheduled departure feature to pre-heat the cabin while still plugged in to preserve driving range.