I live in a rual area (equine) with frequent power outages. Most are very short duration, 5 to 30 minutes. However, I now have a new technique: as soon as the power goes out, I start the 20/2 listeroid. After an hour or two, I check and see of the line power is back on. This gives me an excuse to run my engine, justify costs to wife, and ensure it really is redy for a prolonged outage.