If you can, get yourself a nice portable battery - it should be able to run the oxygen machine all night with no problems if you spec it right, and you can recharge the battery during the day with the generator or via alternator while driving.
Discussion
Yes, that would be my suggestion as well.. tho I don't think the old man wants to or can spend the money on that. That machine seems to draw a shitload of power, you'd prob need a ton of battery watt hours to run it for 8hrs.. I'll maybe throw a kilowatt on it, now that the trip is over, out of curiosity.. this was all newly discovered 'gotchas' to me while already on the trip 😅😅😅


