We have one and for the first time this year we used it when the power went out. However, the generator kicked in and kept our food cold, house cool, lights on. We needed these things for about six hours. There have been times in the past when power was out for five days in winter. Sure could have used it then. We purchased ours from Harbor Freight and installed it for about $1100. We certainly believe it is worth every dollar especially for extended periods of time. In saved foods alone if nothing else.
