I've had a Generac (propane) for over 10 yrs. I have it serviced professionally every 2 yrs. It's been great. It came with a 12 position transfer switch so we hooked up only the essentials (furnace,water pump,beer frig, TV, etc). They do use a significant amount of propane if runs for an extended amount of time but it sure beats sitting in the dark like the neighbors.