Mine kept the temperatures fine for days during the big wind storm. I had backup thermometers, and temps were reasonably stable. Eggs hatched into healthy babies.
Earlier this year, we had a power outage for a full day, and overnight, and a small generator ran the incubator--those eggs just hatched, and were fine. Temps read stable during the power outage. Used a normal herpstat.
Different generator from the first time, too--this one was smaller.
So, maybe they aren't supposed to work on generators, but they did.
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