Official EIA-861 State Grid Summary
Montana Power Outage Risk, Electric Utilities & Generator Sizing
Montana households average 5.9 hrs/yr (352 minutes/year) of total blackout duration across 1.62 outages/year (Reliability Grade C — Elevated Storm Risk), with an average residential electricity rate of 12.75 ¢/kWh.
Interactive Appliance Load Calculator
⚡ Home Backup Wattage Sizer for Montana
Check the appliances you need to keep running during a blackout. We calculate your continuous running watts, highest motor starting surge, and 20% NEC safety headroom automatically.
Live Sizing Result (+20% Headroom)
3,000 W
Recommended Minimum Generator / Inverter Rating
1,250 WContinuous Running
2,250 WPeak Motor Surge
Top Cities & Towns in Montana
Billings→Missoula→Great Falls→Bozeman→Butte-Silver Bow→Helena→Kalispell→Belgrade→Anaconda-Deer Lodge County→Whitefish→Havre→Livingston→Miles→Laurel→Lewistown→Sidney→Columbia Falls→Polson→Hamilton→Glendive→Dillon→Hardin→Shelby→Libby→Glasgow→Deer Lodge→Cut Bank→Red Lodge→Wolf Point→Conrad→East Helena→Stevensville→Townsend→Ronan→Manhattan→Colstrip→Roundup→Columbus→Three Forks→Malta→Choteau→Baker→Big Timber→Forsyth→Plentywood→Eureka→Thompson Falls→Fort Benton→Boulder→Plains→West Yellowstone→Chinook→Whitehall→Ennis→White Sulphur Springs→
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Electric Utilities Operating in Montana (EIA Form 861)
| Utility Name | Ownership | Customers | Outages/Yr | Annual Outage Time | Avg Restoration | Residential Rate |
|---|---|---|---|---|---|---|
| NorthWestern Energy LLC - (MT) (#12825) | Investor-Owned | 328,125 | 1.30x/yr | 233 min (3.9h) | 180 min | 14.23 ¢/kWh |
| Flathead Electric Coop Inc (#6395) | Cooperative | 63,317 | 2.72x/yr | 586 min (9.8h) | 216 min | 9.67 ¢/kWh |
| Yellowstone Valley Elec Co-op (#20997) | Cooperative | 21,182 | 1.62x/yr | 352 min (5.9h) | 217 min | 13.35 ¢/kWh |
| Montana-Dakota Utilities Co (#12199) | Investor-Owned | 19,616 | 1.95x/yr | 360 min (6.0h) | 185 min | 12.89 ¢/kWh |
| USBIA-Mission Valley Power (#19603) | Federal | 16,292 | 1.62x/yr | 352 min (5.9h) | 217 min | 8.91 ¢/kWh |
| Missoula Electric Coop, Inc (#12692) | Cooperative | 14,686 | 3.59x/yr | 1606 min (26.8h) | 447 min | 10.50 ¢/kWh |
| Ravalli County Elec Coop, Inc (#26916) | Cooperative | 12,088 | 1.62x/yr | 352 min (5.9h) | 217 min | 10.43 ¢/kWh |
| Vigilante Electric Coop, Inc (#23586) | Cooperative | 11,288 | 1.62x/yr | 352 min (5.9h) | 217 min | 9.67 ¢/kWh |
| Glacier Electric Coop, Inc (#7262) | Cooperative | 7,959 | 1.62x/yr | 352 min (5.9h) | 217 min | 9.81 ¢/kWh |
| Park Electric Coop Inc (#14500) | Cooperative | 6,946 | 1.62x/yr | 352 min (5.9h) | 217 min | 8.87 ¢/kWh |
| Lincoln Electric Coop, Inc (#11022) | Cooperative | 6,742 | 1.62x/yr | 352 min (5.9h) | 217 min | 10.91 ¢/kWh |
| Fergus Electric Coop, Inc (#21513) | Cooperative | 6,682 | 1.00x/yr | 1239 min (20.6h) | 100 min | 15.52 ¢/kWh |
| Beartooth Electric Coop, Inc (#1417) | Cooperative | 6,457 | 1.62x/yr | 352 min (5.9h) | 217 min | 13.34 ¢/kWh |
| Sun River Electric Coop, Inc (#18401) | Cooperative | 6,268 | 1.62x/yr | 352 min (5.9h) | 217 min | 12.71 ¢/kWh |
| McCone Electric Coop Inc (#11989) | Cooperative | 5,464 | 1.62x/yr | 352 min (5.9h) | 217 min | 16.22 ¢/kWh |
| Tongue River Electric Coop Inc (#19022) | Cooperative | 5,177 | 1.62x/yr | 352 min (5.9h) | 217 min | 13.60 ¢/kWh |
| Northern Lights, Inc (#13758) | Cooperative | 3,985 | 1.00x/yr | 352 min (5.9h) | 100 min | 12.52 ¢/kWh |
| Hill County Electric Coop, Inc (#8632) | Cooperative | 3,970 | 1.62x/yr | 352 min (5.9h) | 217 min | 10.17 ¢/kWh |
| Marias River Electric Coop Inc (#11643) | Cooperative | 3,833 | 1.62x/yr | 352 min (5.9h) | 217 min | 10.22 ¢/kWh |
| Sheridan Electric Coop, Inc (#16759) | Cooperative | 3,759 | 1.62x/yr | 352 min (5.9h) | 217 min | 11.76 ¢/kWh |
| Big Horn County Elec Coop, Inc (#1683) | Cooperative | 3,655 | 1.62x/yr | 352 min (5.9h) | 217 min | 13.89 ¢/kWh |
| Lower Yellowstone R E A, Inc (#11272) | Cooperative | 3,499 | 0.88x/yr | 88 min (1.5h) | 100 min | 8.83 ¢/kWh |
| Southeast Electric Coop, Inc (#17593) | Cooperative | 2,198 | 1.62x/yr | 352 min (5.9h) | 217 min | 12.39 ¢/kWh |
| Big Flat Electric Coop Inc (#1671) | Cooperative | 2,075 | 1.62x/yr | 352 min (5.9h) | 217 min | 13.06 ¢/kWh |
| Mid-Yellowstone Elec Coop, Inc (#12463) | Cooperative | 2,040 | 1.62x/yr | 352 min (5.9h) | 217 min | 14.75 ¢/kWh |
| NorVal Electric Cooperative, Inc (#13749) | Cooperative | 1,937 | 1.62x/yr | 352 min (5.9h) | 217 min | 15.59 ¢/kWh |
| Fall River Rural Elec Coop Inc (#6169) | Cooperative | 1,508 | 0.13x/yr | 16 min (0.3h) | 124 min | 11.39 ¢/kWh |
| City of Troy - (MT) (#19236) | Municipal | 1,058 | 1.62x/yr | 352 min (5.9h) | 217 min | 8.10 ¢/kWh |
| Goldenwest Electric Coop, Inc (#7318) | Cooperative | 861 | 1.62x/yr | 352 min (5.9h) | 217 min | 20.13 ¢/kWh |
| Big Horn Rural Electric Co (#1675) | Cooperative | 71 | 1.62x/yr | 352 min (5.9h) | 217 min | 12.86 ¢/kWh |
| Powder River Energy Corp (#19156) | Cooperative | 52 | 2.88x/yr | 496 min (8.3h) | 172 min | 12.69 ¢/kWh |
| McKenzie Electric Coop Inc (#12087) | Cooperative | 25 | 1.82x/yr | 257 min (4.3h) | 141 min | 8.61 ¢/kWh |
| Grand Electric Coop, Inc (#7484) | Cooperative | 16 | 1.62x/yr | 352 min (5.9h) | 217 min | 13.64 ¢/kWh |
| Black Hills Power, Inc. (#19545) | Investor-Owned | 12 | 1.20x/yr | 59 min (1.0h) | 50 min | 6.96 ¢/kWh |
| Avista Corp (#20169) | Investor-Owned | 9 | 0.96x/yr | 152 min (2.5h) | 158 min | 8.50 ¢/kWh |