CPAP on Battery Power (RV)

[Dingbat]

Howdy folks,

I have a RESMED S3 Elite and do not use the humidifier. I'm going camping this weekend with my pop-up camper autonomously (under battery power) and was wondering how long the Battery will last with the CPAP connected to one of the 110V outlet of the camper. It's only two nights with nothing else drawing power (except maybe for a couple of 12V lights during the evening). The battery is a typical deep discharge marine battery and it's currently fully charged.

Thank you.

[nittalagh]

Here is a link to Resmed's battery guide: http://www.resmed.com/us/assets/documen ... lo_eng.pdf

Near the end there is a chart that shows the size of battery required to power the CPAP for 1 night, from that you should be able to determine how long your battery will last.

[wil]

I bought a 12V power adapter for my PR System One. The adapter is made by Phillips for their xPaps, so I trust it. Further, it should give you a much better life than using your RV's 12V/110V converter. Here's the link... Take a look at the customer reviews, also...

https://www.cpap.com/productpage/DC-12-Inverter.html

I use mine on my boat from time to time, with two deep cycle batteries on board. I've never had any trouble getting through the night with the humidifier off (passover, it's usually pretty humid on the boat anyway!). It takes a lot of energy to run the 110V converter, and if you can run your xPap off of a cigarette lighter style power outlet (12V), you should get a much better life.

[jmcanzo]

the 110 outlets on your pop-up will not work on battery.

[wil]

the 110 outlets on your pop-up will not work on battery.

There could be a built in power inverter, so they may. It depends on your exact set up, how new your pop-up is, whether you got that feature, etc. IF it does work, though, it's going to kill your battery quickly. It's definitely worth checking before you go and/or spend any money on possible work-arounds...

The ResMed 12V adapter I linked earlier is more expensive than the PRs because the PR uses an external "brick" on the power line to downconvert home power to 12V. Therefore that adapter is very simple. Just regulates 12V. The Resmed uses an in-line converter on the 12V adapter, and is more complicated.

In other words, PR - Simple 12V, complicated 110V. ResMed - Complicated 12V, simple 110V.

[Fanatical1]

I agree with the previous poster that your 110V outlets will not work unless your plugged into 110V. If you have a 12V plug in your camper you will need to buy an inverter to convert your 12V to 110V. Buy an inverter with a capacity of aprox. 150 watts that has a 12V plug. Most RV 12V plugs have a max capacity of 100 watts so you will not be able to use your heating element on the CPAP without oveloading the circuit. Don't forget an extension cord between your inverter and your CPAP. If you don't have a 12V plug you will need to wire the inverter directly to your battery.

If your batttery is in decent shape, and you don't run your furnace or use the lights much, you will be able to go 2 days, but I would get nervous about 3.

We camp all the time without power and have two golf cart batteries that can go for about 4 - 5 days using my CPAP, lights and everything else. Don't use your furnace because it draws a lot of juice and will kill your battery quickly.

Good luck.

[nanwilson]

Advise from another Canuck. Go to Canadian Tire and buy an Eliminator power pack 600 or 700....just plug in, but do not use your humidifier it takes too much power. I believe they cost about $170. I am about to do the same thing, a friend ( another Canuck )of mine uses one. He says he gets good results, and recharges it from his truck battery, or if he is only out camping for a few days he waits till he gets home and he plugs it in there. Its also good when the power goes out at home, you can still make your coffee in the morning .
Nan