CPAP and RVs

I have a Resmed S9. I am looking at buying a RV and the constant thought is how am I going to dry camp without running the pesky generator all night and using my CPAP? Some of the newer coaches (expensive), have 4-6 house batteries attached to an invertor that solves the problem. But these are mostly on the Class A big ones! Most of the Class Cs have a max of 2 house batteries and no invertor. Has anyone here (I'm sure there is) run into this issue? How do you solve going from 12V deep cycle to 110 without draining you house batteries?

gosman wrote:I have a Resmed S9. I am looking at buying a RV and the constant thought is how am I going to dry camp without running the pesky generator all night and using my CPAP? Some of the newer coaches (expensive), have 4-6 house batteries attached to an invertor that solves the problem. But these are mostly on the Class A big ones! Most of the Class Cs have a max of 2 house batteries and no invertor. Has anyone here (I'm sure there is) run into this issue? How do you solve going from 12V deep cycle to 110 without draining you house batteries?

I have a class C and camp with a deep cycle marine battery bought specifically for my cpap machine. Please do some reading here, especially anything by capn loki ...or better still just type the word battery in the search box above and you will get a ton of wonderful info that you can use.
Good camping
Nan

After doing comparison pricing, my off-grid machine is the Intellipap Autoadjust.
It runs off the car power outlet (cigarette lighter), or ordinary 12VDC with an inexpensive cord.
Resmed-specific power is so expensive, and an extra machine made more sense, for about the same money.
In case of a death on the nightstand, I am covered.
Respironics machines also can run directly off 12VDC, and a used machine of either make could be very affordable.

Thanks Frog- I looked at the manual the Intellipap autoadjust and it does indeed work with 12 VDC! I've never heard of them and doubt that my medical supply company here in Dallas deals with them. They do have the Respironics machines. And my insurance company will allow me to have another CPAP!! So lucky.

Resmed sells a DC to DC convertor for the S9 for less than $100.

Thank you. Oh, there it is.
https://www.cpap.com/productpage/DC-Con ... hines.html
I do not regret getting the backup, as Murphy has our address . . .

gosman wrote:Thanks Frog- I looked at the manual the Intellipap autoadjust and it does indeed work with 12 VDC! I've never heard of them and doubt that my medical supply company here in Dallas deals with them. They do have the Respironics machines. And my insurance company will allow me to have another CPAP!! So lucky.

Only time for a quick note - Respironics will run directly off the battery just fine, and having a second machine for travel/backup is a good thing. (I bought a second Respironics 560 just for use on my boat.) If you can get by without humidity, a cpap uses about 4-10 Amp-hours a night, easily handled by an RV house bank battery. If you need humidity, that could go up to 20-30 A-h which can still be done, but you have to watch what other loads you put on the battery, and make sure you recharge every day. Unfortunately an inverter is only 60% efficient, so if you stay with the ResMed, get the 12-24 volt converter. I've been thinking of getting an RV (a land Loki!) and I haven't given the cpap a second thought, its the refrigerator and TV that takes all the power!

gosman wrote:I have a Resmed S9. I am looking at buying a RV and the constant thought is how am I going to dry camp without running the pesky generator all night and using my CPAP? Some of the newer coaches (expensive), have 4-6 house batteries attached to an invertor that solves the problem. But these are mostly on the Class A big ones! Most of the Class Cs have a max of 2 house batteries and no invertor. Has anyone here (I'm sure there is) run into this issue? How do you solve going from 12V deep cycle to 110 without draining you house batteries?

Hubby and I used to do a lot of RVing. (This was before I was diagnosed with sleep apnea.) He could run his CPAP on the 12-volt outlet by the bed, without the humidifier, for almost one whole night. That would completely kill our (brand-new, high-end, deep-cycle) battery.

Now that we're a 2-CPAP household, our dry camping days are done.

Sorry the news wasn't better.

IDontSnoreISwear wrote:Now that we're a 2-CPAP household, our dry camping days are done.

Sorry the news wasn't better.

lots of people have more successful experiences.

Well if you convert over to gas at night for the refrigerator and use LED lights (the newer RVs have), then I should be good to go with 2 house batteries! Thanks- I will sleep better and think about all of you in my dreams!

IDontSnoreISwear wrote:

gosman wrote:I have a Resmed S9. I am looking at buying a RV and the constant thought is how am I going to dry camp without running the pesky generator all night and using my CPAP? Some of the newer coaches (expensive), have 4-6 house batteries attached to an invertor that solves the problem. But these are mostly on the Class A big ones! Most of the Class Cs have a max of 2 house batteries and no invertor. Has anyone here (I'm sure there is) run into this issue? How do you solve going from 12V deep cycle to 110 without draining you house batteries?

Hubby and I used to do a lot of RVing. (This was before I was diagnosed with sleep apnea.) He could run his CPAP on the 12-volt outlet by the bed, without the humidifier, for almost one whole night. That would completely kill our (brand-new, high-end, deep-cycle) battery.

Now that we're a 2-CPAP household, our dry camping days are done.

Sorry the news wasn't better.

Sorry but I am confused.... I don't use my house batteries in my class C. I have a12 volt deep cycle battery only used for my cpap. I have never run the deep cycle battery dry and I have gone 4 consecutive 8 hour nights at a pressure of 11. I paid about $80 for my battery (and that's Canadian), if I had a 2 person hosehead household, I would just buy another battery and keep on camping. I enjoy camping too much to give it up... beside it gets me out to the mountains WITHOUT my kids and grandkids .
Cheers and happy camping
Nan

I have a new camper, every light is LED and two 12v deep cycle batteries and I use my Z1 Auto. I've gone on many a 3 night dry camp without issue at a pressure of 14-20. I am considering solar so I don't have to worry about conserving for the cpap.

I can also say from experience that lower pressures use a lot less juice than the higher ones.

We have 2 solar panels, I believe they are 40 watts each and when we dry camp the solar catches up the batteries every day, including frig, coffee pot, low wattage microwave and my CPAP. Only bad thing is we have to stay out from under the trees, and can't use the A/C, so it gets a little toasty inside. Gets that's why they invented the great outdoors.

I've done a fair amount of RV'ing with respironics cpap's. I use the humidifier as a passover and I've found the gauge and length of the DC wires make a big difference. One of may trailers had the batteries at the back and my bed at the front, about 25' away. I used to get 1 night with the manufactures wiring and when I upgraded to 2 nights I could get almost 2 nights. In my new trailer, last summer I didn't have the wiring hooked up so I used the battery next to the bed and I got 3 nights with no problem.

Chris