BMW i7 M70: energy use, battery size and what it costs to charge
EPA figures for 2024, 2025, 2026 BMW i7 M70 (6 configurations), plus the cost to charge at home in every U.S. state at May 2026 electricity prices.
41.61 kWh/100mi · 174th of 223
The BMW i7 M70 uses 41.61 kWh per 100 miles. Across the 223 electric cars on sale that figure runs from 23.1 to 66.1, which puts this one among the thirstier.
How much does it cost to charge a BMW i7 M70?
At the U.S. average residential price of 19.42¢ per kWh, a BMW i7 M70 costs about $8.08 per 100 miles, $21.17 for a full charge, and $970 a year at 12,000 miles. The same car costs $655 a year in Nevada and $2,632 in Hawaii — a 4.0× difference driven entirely by where you plug in.
BMW i7 M70 vs. a petrol car
A typical new gasoline large car returns 29 MPG. At $4.32 a gallon — the U.S. average for the week of 2026-09-14, up 14.3% on the year — that is $14.89 per 100 miles against $8.08 for the BMW i7 M70 on average-priced electricity. Over 12,000 miles the fuel difference is $817 a year in favour of the electric car.
- Nevada $655
- Texas $796
- California $1,735
- Hawaii $2,632
Cost to charge a BMW i7 M70 in every state
| State | ¢/kWh | vs. last year | Per 100 mi | Full charge | Per year |
|---|---|---|---|---|---|
| Nevada | 13.11 | +6.9% | $5.46 | $14.29 | $655 |
| Nebraska | 13.25 | +0.8% | $5.51 | $14.44 | $662 |
| Utah | 13.37 | +2.1% | $5.56 | $14.57 | $668 |
| Louisiana | 13.49 | +5.9% | $5.61 | $14.70 | $674 |
| Tennessee | 14.07 | +1.8% | $5.85 | $15.34 | $703 |
| Arkansas | 14.12 | +5.6% | $5.88 | $15.39 | $705 |
| North Dakota | 14.12 | +3% | $5.88 | $15.39 | $705 |
| Kentucky | 14.26 | +6.4% | $5.93 | $15.54 | $712 |
| Oklahoma | 14.33 | +5.1% | $5.96 | $15.62 | $716 |
| Idaho | 14.37 | +19.1% | $5.98 | $15.66 | $718 |
| North Carolina | 14.74 | +10.2% | $6.13 | $16.07 | $736 |
| Mississippi | 14.88 | +5.8% | $6.19 | $16.22 | $743 |
The other 39 states
| State | ¢/kWh | vs. last year | Per 100 mi | Full charge | Per year |
|---|---|---|---|---|---|
| Washington | 14.91 | +15% | $6.20 | $16.25 | $744 |
| New Mexico | 15.06 | +2.6% | $6.27 | $16.42 | $752 |
| Florida | 15.10 | -1.6% | $6.28 | $16.46 | $754 |
| Montana | 15.14 | +2.2% | $6.30 | $16.50 | $756 |
| Arizona | 15.18 | -0.3% | $6.32 | $16.55 | $758 |
| Wyoming | 15.24 | +2.4% | $6.34 | $16.61 | $761 |
| South Dakota | 15.36 | +8% | $6.39 | $16.74 | $767 |
| West Virginia | 15.45 | -2.3% | $6.43 | $16.84 | $771 |
| South Carolina | 15.55 | +5.1% | $6.47 | $16.95 | $776 |
| Kansas | 15.71 | +4.5% | $6.54 | $17.12 | $784 |
| Iowa | 15.93 | +3.9% | $6.63 | $17.36 | $795 |
| Texas | 15.94 | +4.5% | $6.63 | $17.37 | $796 |
| Missouri | 16.22 | +1.9% | $6.75 | $17.68 | $810 |
| Oregon | 16.32 | +3.3% | $6.79 | $17.79 | $815 |
| Georgia | 16.36 | +2.5% | $6.81 | $17.83 | $817 |
| Alabama | 16.40 | +2.1% | $6.82 | $17.88 | $819 |
| Colorado | 17.13 | +6.8% | $7.13 | $18.67 | $855 |
| Virginia | 17.22 | +13.1% | $7.17 | $18.77 | $860 |
| Indiana | 17.51 | +6.2% | $7.29 | $19.09 | $874 |
| Minnesota | 17.52 | +2.3% | $7.29 | $19.10 | $875 |
| Ohio | 19.19 | +9.7% | $7.98 | $20.92 | $958 |
| Delaware | 19.29 | +6.2% | $8.03 | $21.03 | $963 |
| Wisconsin | 19.56 | +5.6% | $8.14 | $21.32 | $977 |
| Illinois | 19.89 | +8.7% | $8.28 | $21.68 | $993 |
| Pennsylvania | 21.73 | +10.4% | $9.04 | $23.69 | $1,085 |
| Maryland | 21.84 | +13.2% | $9.09 | $23.81 | $1,091 |
| Michigan | 22.99 | +10.4% | $9.57 | $25.06 | $1,148 |
| Connecticut | 24.32 | -10.6% | $10.12 | $26.51 | $1,214 |
| District of Columbia | 24.39 | +7.4% | $10.15 | $26.59 | $1,218 |
| Vermont | 24.44 | +6.3% | $10.17 | $26.64 | $1,220 |
| New Jersey | 24.95 | +0.3% | $10.38 | $27.20 | $1,246 |
| New Hampshire | 27.01 | +14.9% | $11.24 | $29.44 | $1,349 |
| Alaska | 28.21 | +5% | $11.74 | $30.75 | $1,409 |
| Rhode Island | 29.23 | +8.9% | $12.16 | $31.86 | $1,460 |
| New York | 29.49 | +11.1% | $12.27 | $32.14 | $1,472 |
| Maine | 29.59 | +5.2% | $12.31 | $32.25 | $1,477 |
| Massachusetts | 29.61 | -2.4% | $12.32 | $32.27 | $1,478 |
| California | 34.74 | +3.4% | $14.46 | $37.87 | $1,735 |
| Hawaii | 52.72 | +28.7% | $21.94 | $57.46 | $2,632 |
Every BMW i7 M70 configuration compared
| Year / configuration | kWh/100mi | mi/kWh | Battery (est.) | Range | MPGe | 240V |
|---|---|---|---|---|---|---|
| 2024 i7 M70 xDrive Sedan (21 inch Wheels) | 41.61 | 2.4 | 109 kWh | 291 mi | 81 | 11 h |
| 2024 i7 M70 xDrive Sedan (20 inch Wheels) | 43.77 | 2.28 | 107.9 kWh | 274 mi | 77 | 11 h |
| 2025 i7 M70 xDrive Sedan (21 inch Wheels) | 42.66 | 2.34 | 109.4 kWh | 285 mi | 79 | 12 h |
| 2025 i7 M70 xDrive Sedan (20 inch Wheels) | 44.94 | 2.23 | 108.4 kWh | 268 mi | 75 | 12 h |
| 2026 i7 M70 xDrive Sedan (21 inch Wheels) | 42.66 | 2.34 | 109.4 kWh | 285 mi | 79 | 10 h |
| 2026 i7 M70 xDrive Sedan (20 inch Wheels) | 44.94 | 2.23 | 108 kWh | 267 mi | 75 | 10 h |
Questions people ask about the BMW i7 M70
How many kWh per 100 miles does a BMW i7 M70 use?
The BMW i7 M70 uses 41.61 kWh per 100 miles on the EPA combined cycle, which works out to 2.4 miles per kWh. Across all 6 EPA-rated configurations it ranges from 41.61 to 44.94 kWh per 100 miles.
How big is the BMW i7 M70 battery?
Its usable battery capacity works out to roughly 109 kWh. EPA does not publish battery size directly, so this is calculated from EPA range (291 miles) and rated energy use, corrected for charging losses — expect a few kWh of error against the manufacturer figure.
How much does it cost to charge a BMW i7 M70 at home?
About $21.17 for a full charge at the U.S. average residential electricity price of 19.42¢ per kWh, or $8.08 per 100 miles. Over a year at 12,000 miles that is $970. In Nevada the same driving costs $655; in Hawaii it costs $2,632.
How long does a BMW i7 M70 take to charge on a 240V charger?
EPA rates it at about 11 hours for a full charge on a 240-volt (Level 2) charger. A standard 120-volt household outlet takes roughly five to six times longer; DC fast charging is far quicker but costs considerably more per kWh than charging at home.
Is a BMW i7 M70 cheaper to run than a gasoline car?
On fuel alone, yes. A BMW i7 M70 costs about $8.08 per 100 miles in electricity. A typical new gasoline large car manages 29 MPG, which at $4.32 a gallon costs $14.89 per 100 miles — $6.81 more. Over 12,000 miles the difference is $817 a year in the EV's favour. This compares fuel only — not insurance, depreciation, maintenance or your state's EV registration fee.
Cars to compare it with
Almost identical energy use
These use within a fraction of a kWh per 100 miles of the BMW i7 M70, so running cost is effectively a wash between them — the decision comes down to everything else.
| Electric car | kWh/100mi | Range | Battery (est.) | Per year |
|---|---|---|---|---|
| Cadillac CELESTIQ | 41.61 | 303 mi | 113.5 kWh | $970 |
| Maserati Grecale Folgore | 41.61 | 268 mi | 100.4 kWh | $970 |
| Polestar 3 Pack | 41.61 | 281 mi | 105.2 kWh | $970 |
| Rolls-Royce Spectre | 41.61 | 291 mi | 109 kWh | $970 |
| Kia EV9 GT-Line | 41.1 | 280 mi | 103.6 kWh | $958 |
| Mercedes-Benz AMG EQS | 41.1 | 305 mi | 112.8 kWh | $958 |
Other electric large cars
- Mercedes-Benz AMG EQS — 41.1 kWh/100mi
- Dodge Charger Daytona — 38.3 kWh/100mi
- Mercedes-Benz EQS 580 — 35.11 kWh/100mi
- Dodge Charger Daytona R/T — 34.39 kWh/100mi
- Mercedes-Benz EQS 450 — 34.39 kWh/100mi
- Audi S6 e-tron — 32.72 kWh/100mi
- Lucid Air Sapphire — 32.1 kWh/100mi
- Tesla Model S Plaid — 30.64 kWh/100mi
- Audi A6 e-tron — 30.36 kWh/100mi
- Tesla Model S — 27.18 kWh/100mi
Other BMW electric cars
- i4 M50 — 35.48 kWh/100mi
- i4 M60 — 34.39 kWh/100mi
- i4 eDrive35 — 28.09 kWh/100mi
- i4 eDrive40 — 28.56 kWh/100mi
- i4 xDrive40 — 30.92 kWh/100mi
- i5 M60 — 34.05 kWh/100mi
- i5 eDrive40 — 29.06 kWh/100mi
- i5 xDrive40 — 33.7 kWh/100mi
- i7 eDrive50 — 37.45 kWh/100mi
- i7 xDrive50 — 36.64 kWh/100mi
Where these numbers come from
Energy use per 100 miles is 3,370.5 ÷ MPGe, because EPA
defines MPGe against 33.705 kWh per gasoline gallon equivalent. EPA meters
that energy at the wall, so charging losses are already included.
Usable battery size is EPA range × kWh per 100 miles ÷ 100 ×
0.90. The 0.90 corrects for the fact that EPA measures energy at the wall but
measures range from the pack; without it the estimate runs about 10% high.
It is an estimate, not a manufacturer specification — expect a few kWh of
error either way.
Cost assumes home charging at the state's average
residential electricity price (EIA, May 2026) and
12,000 miles a year. Public DC fast
charging costs considerably more; time-of-use plans can cost less.
The petrol comparison uses the median combined MPG of
current regular-gasoline, non-hybrid cars in this car's own EPA vehicle class
— not an all-car average — priced at the U.S. average retail price from the
EIA weekly series. It counts fuel only.