Smaller generators give out crap waveforms, fail in tedious ways and are generally not good for things that are sensitive. A big generator won't stall if your

Smaller generators give out crap waveforms, fail in tedious ways and are generally not good for things that are sensitive. A big generator won't stall if your AC kicks in at the same time you have the oven on, or something similar. So if you have regular outages, I can certainly see the appeal of a 27kw generator.