Ameren Illinois Company, IL
Ameren Illinois Company's outage record
Illinois's grid here runs a bit rougher than most: 1.2 outages from Ameren Illinois Company in the most recent year, 4.8 hours total. That is 99% more outage time than the Illinois state average of 2.4 hours a year.
What a typical outage at Ameren Illinois Company looks like
4 hours is this grid's average outage length - long enough that a standby generator, not a portable or battery unit, is the more realistic fit. The frequency-versus-duration guide covers why length decides the kind of backup.
Do Ameren Illinois Company customers need a generator
Serving 1,251,245 customers here, Ameren Illinois Company customers lose more power than most of the country sees, so a generator is worth getting rather than an overreaction.
How Ameren Illinois Company's record was measured
Ameren Illinois Company filed these numbers itself, as an investor-owned utility, under EIA Form 861 - a federal reliability report covering its entire Illinois territory, serving 1,251,245 customers here, not a single street or outage. Want the Illinois average instead of just this one utility? Illinois's statewide record is here. The full scoring method lives in the methodology guide.