Well I just got back from Campobello Island using my machine plugged into my serious marine battery for 3 days. Everything worked just as it should and I really slept well. I am very pleased.

CapnLoki wrote:

Randy in Maine wrote:...
My "house battery" is a "29 series" (pretty big and 66 pounds 845 amp hours) should go 40 hours or so without any re-charging.

You mean 845 cranking amps. A Group 29 has about 120 amp hours.

You are correct. That is 845 "marine cranking amps" whatever that it.

I bought this cord to run the cpap off the battery....24 volt machine on a 12 volt battery. IMO it is more efficient to go DC to DC as opposed to DC to AC to DC.

https://www.cpap.com/productpage/resmed ... hines.html

Why not just plug your cpap machine into the RV's "house battery" by getting a cord for the cigarette lighter.....DC to DC? The RVs engine or solar panel is usually set up to charge up the house battery anyway. I carry a "normal battery charger" and just got a "battery tender" for when I have AC pow...

I posted this over on another thread, but I can get my post count up by posting here also. I bought this battery box for about $65... https://www.amazon.com/Newport-Vessels-Trolling-Battery-Center/dp/B01AE2TG7G and I will put in a deep cycle marine battery battery from Walmart or Cosco or sometplace...

Shore power is what we all plug into while camping if we have it. If I have that, I will just plug my machine into that source of power. I intend to use my regular battery charger (12/2 amp + 100 amp booster) + I have a battery tender just for marine batteries for a longer and more complete charge. ...

New person here. Be gentle. I just got my machine and will be doing a fair amount of camping with it summer and into fall. I just ordered up a new DC to DC power cord for my ResMed 10 Auto machine (90 watts) from the cpap store and this marine battery box.... https://www.amazon.com/Newport-Vessels-T...