NorthWestern Energy LLC, MT
NorthWestern Energy LLC's outage record
NorthWestern Energy LLC customers in Montana had 1.1 interruptions last year, 2.1 hours total - a bit below the typical US utility's outage time. That is 56% less outage time than the Montana state average of 4.8 hours a year.
How long a single NorthWestern Energy LLC outage runs
A single outage here averages 1.9 hours. That is squarely in battery-power-station range; a fuel generator is overkill for most of these. Why outage length, not count, picks the backup: how often vs how long.
The generator question for NorthWestern Energy LLC
Serving 383,135 customers here, Outages at NorthWestern Energy LLC run below the national norm, so a generator is not urgent - still worth checking if you have medical equipment or a sump pump that cannot go without power.
The source behind this number
NorthWestern Energy LLC filed these numbers itself, as an investor-owned utility, under EIA Form 861 - a federal reliability report covering its entire Montana territory, serving 383,135 customers here, not a single street or outage. See Montana as a whole, across every utility that filed: Montana's outage record. The full scoring method lives in the methodology guide.