I purchased the 12v converter to use with a deep cycle marine battery since I use the CPAP on a weeklong fishing trip deep into Quebec. The converter costs about $82 online. I then mounted a 12v accessory plug on my night stand, ran a fused wire into my front storage box where I keep the deep cycle battery. In Canada, I can run the CPAP a week or more without charging. No humidifier or heated hose of course. Very happy with this setup.
Larry & Chris (Abbey & Brody camping cats)
2014 GMC Sierra 1500 DC, 5.3 L, 3.73, 4x4
2015 Rockwood MiniLite 2104S, EMS-30HW, Carchet TPMS
Days Camped: 2015 = 51; 2016 = 53 so far with 12 more planned
If you're lucky enough to be camping......You're lucky enough.