I lost power at 6:30pm sat and didn't get it to 9:30 Sunday morning. Lost about a dozen chicks from my brooders, we hook up my incubator to the battery in my moms car through the window. Wasn't a good time. Ten minutes after my dad had hook up a brand new generator, the power came back on, but we have it now for next time
Bought a generator off Craigslist a few years ago for that very reason, that and to keep the sump pump operational. Have only had to use it once, it kept the incubator humming in a dry basement.