It also helps that, at least here in Ontario (Canada), diesel is a very popular substitute to run in conventional oil-burning furnaces - having a generator is almost a no-brainer when you've already got tons of fresh fuel on hand.

On the other hand, 27kW is a LOT of generating capacity for one home. I consider that the average home (at least in my area) only has 200A service, and I don't think I've ever heard anyone complain that it's not enough (outside my dad who wanted a 16-person hot tub for two people).