I purchased an inverter that was supposedly a "new" model but it quit working after a few weeks. I paid the shipping fee and returned the inverter. A new one was sent out immediately. That was the good part! The inverter I received was the same model but had completely different features-one cooling fan vs two on the original, the remote was completely different, this one smelled new, the logo was different, fewer screws. Etc.! The point is that the original now seems to have been an old model (I ordered the "new" model} and possibly a refurbished one at that!