-- Last Updated: Feb-15-13 9:16 AM EST --
When he's able to join me on a trip (which is rare, unfortunately) I swipe a deep cycle battery from one of my boats and hook up an inverter to it. From a full charge it will run a CPAP for two nights, and based on what he's told me the machine works just as it does at home on AC. I think it has humidification and heat to condition the air, but I'm not positive as I'm blessed to not need one. We are usually in north Arkansas, which while not exactly Appalachia is a bit above sea level. All that said, I can't imagine being able to carry a deep cycle battery and CPAP in a kayak, but I'm sure you know that. Might be able to carry them in a canoe.