This inverter has been running for several months using a small solar power system to power a small freezer. Then it stopped. I was able to return it, but for returning the defective inverter I was charged a $33 restocking fee, which was deducted from my refund. I suppose I can picture it as a rental for the few months I've been using this thing, but my solar power system is offline right now until the best inverter I've ordered arrives, so that's disappointing. If you rely on this inverter, have a spare ready.