Is Power Joe an inverter generator? Power Joe is not an inverter generator. Power Joe consumes less fuel at low loads, however it will not be as economic as an inverter generator. Related articles What do the status indicators mean on my24V-150WI Portable Powered Inverter? Is this unit SJG4100LP Transfer Switch Ready? What devices is my 24V-150WI Portable Powered Inverter compatible with? What type of wire is Power Joe wound with? What is the benefit of a Spring-Loaded Ice Chopper?