BMW i7 xDrive60 in Montana
Home charging at 12.55¢/kWh (EIA). 39 kWh per 100 miles (EPA combined). Public DC fast: 38¢/kWh avg.
EV vs gas car — annual fuel cost
The BMW i7 xDrive60 at home rates compared against a typical 28-mpg gas car and a 40-mpg hybrid at the Montana fuel price ($3.30/gal).
| Annual mileage | BMW i7 xDrive60 (home) | 28-mpg gas | 40-mpg hybrid | EV savings vs gas |
|---|---|---|---|---|
| 6,000 mi | $294 | $707 | $495 | $413 |
| 10,000 mi | $489 | $1179 | $825 | $689 |
| 12,000 mi | $587 | $1414 | $990 | $827 |
| 15,000 mi | $734 | $1768 | $1238 | $1034 |
| 20,000 mi | $979 | $2357 | $1650 | $1378 |
Home vs public DC fast charging
Home charging is the default cost optimization. Public DC fast charging in Montana runs about 3.0× the home rate. For 12,000 miles/yr entirely on DC fast, annual fuel cost would be $1778 vs $587 at home — a $1191 penalty. Apartment dwellers and road-trippers should price this in; daily commuters with home Level 2 can usually ignore public chargers.
DC fast rate is a network average (Electrify America + EVgo + Tesla Supercharger + ChargePoint). Real prices vary by location, time of day, and membership tier.
EV incentives in Montana
Montana does not currently run a state-level EV purchase rebate. Federal Section 30D credit of $7,500 still applies for qualifying vehicles (US-assembled with sourced battery components, MSRP cap, household income cap). Check the EV tax credit eligibility list for your vehicle. Some utilities offer charger installation rebates — check with your local utility.
Same vehicle in neighboring states
How BMW i7 xDrive60 cost compares in Montana's contiguous neighbors. Relevant for cross-border driving and relocation decisions.
| State | Electricity | Gas | EV / 100mi | Saves vs gas |
|---|---|---|---|---|
| Montana (current) | 12.55¢ | $3.30 | $4.89 | $6.89 |
| North Dakota | 11.05¢ | $3.20 | $4.31 | $7.12 |
| Wyoming | 11.16¢ | $3.20 | $4.35 | $7.08 |
| Idaho | 11.59¢ | $3.45 | $4.52 | $7.80 |
| South Dakota | 12.84¢ | $3.15 | $5.01 | $6.24 |
Vehicle specs
- EPA combined efficiency: 39 kWh/100 miles
- EPA range: 308 miles
- Make / model: BMW i7
Other EVs in Montana
Common questions
- How much does it cost to charge a BMW i7 xDrive60 at home in Montana?
- About $4.89 per 100 miles at the Montana residential electricity rate of 12.55¢/kWh (EIA). For comparison, a 28-mpg gas car at local gas prices costs $11.79 per 100 miles. Annual savings at 12,000 miles: ~$827.
- Home charging vs public DC fast charging — what's the difference in Montana?
- Public DC fast charging in Montana averages ~38¢/kWh — that's 3.0× home rates. A 100-mile session costs roughly $14.82 at public chargers vs $4.89 at home. For daily commuting, home charging pays off. Public fast charging is for road trips and apartment dwellers without home charging access.
- Are there EV incentives in Montana?
- Montana does not currently run a state-level EV purchase rebate. The federal Section 30D tax credit ($7,500) still applies for qualifying vehicles, and your utility may run separate charger-installation rebates.
- Does winter weather affect charging cost in Montana?
- Yes — cold weather can reduce EV efficiency by 15-30% (battery + heater draw). The numbers above use EPA combined ratings; budget +20% for sustained sub-freezing temps. Winter range drop is most pronounced for northern states.
Full data sources and formulas: /sources.