Now that the heating season's here, I'm suddenly interested in a TEG to make enough juice to charge my cell phone from the kerosene heater in the living room. I'd love to put together something big enough to supply one of my 20k btu military heaters in the camper, but they're real power hogs. 13A at 28v. I had a vented salamander-looking heater that was designed to make enough power to keep itself running after a few minutes of juice to start it. Makes me wish I'd thought to write down the model # before selling it.