Redi-Line Electric Motor Inverter. 120VAC power output has a true sine wave, the output voltage/frequency vary with the load and are unregulated. You need a big battery bank to run it. You could use it to run your Bunn coffee maker in the morning. I have one and have been toying with the idea of installing it for just that purpose. Bluebirds use to run them. It uses a sense circuit and will not turn on unless there is a current draw high enough for it to recognize the need for the power. Honeywell use to make them. You will find them used in ambulances, aerial lifts, airport de-icing, contractors, farm, fire truck, marine, mining vehicles, service trucks/ vans, recreational vehicles (RVs) and utilities. Mine is 1600 watts and came out of a ambulance.