sleep apnea machine

Submitted: Friday, Apr 12, 2013 at 20:59
ThreadID: 101663 Views:1832 Replies:7 FollowUps:7
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I want to use a sleep apnea machine when free camping. Has anyone run a sleep apnea machine from 12v supply. I release I need a 12v to 240v inverter, but I do not want to spend much money. I will not need the Inverter for any other purpose. Any suggestions would be helpful.
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Reply By: Motherhen - Friday, Apr 12, 2013 at 21:48

Friday, Apr 12, 2013 at 21:48
I don't have on Keith, but yes, you can get one to run on 12 v. Another problem with running from an inverter is the noise factor when fan kicks in.

Mh
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Reply By: Member - Keith P (NSW) - Friday, Apr 12, 2013 at 21:53

Friday, Apr 12, 2013 at 21:53
Now Dont get your hopes up here.....but I have an idea that a whisper came thru work (I work in mobility/disabled store) that there is a 12 volt sleep apnea machine available. apparently there is so much demand for one that someone supposedly has done it. that is all the info I have....will ask around at work.
Other than that ....an inverter does work ...but a good large battery is needed to go all night...and a reliable and strong charging system to back it all up as well.

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Follow Up By: Keith H7 - Saturday, Apr 13, 2013 at 09:56

Saturday, Apr 13, 2013 at 09:56
Thanks mate - hope to hear from re the 12v version.
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Reply By: Ken - Friday, Apr 12, 2013 at 22:28

Friday, Apr 12, 2013 at 22:28
Keith no problem if you have a small inverter and mount it it your vehicle to avoid any fan noise. I use a Resmed S9 Elite CPAP machine minus the humidifier when camping with a 150 watt pure sinewave inverter. Not sure how much power just the air pump consumes but I can easily get through a 4 day trip with a little bit of driving each day.
With the humidifier the load is approx 90 watts continuous so with inverter efficiency you would require about 8 amps from the battery. These are rough figures and I'll probably be shot down by some of the pedants here. If it is say 8 amps for 6 hrs that's 48 amphours or roughly half the capacity of generally used 100 AH aux batteries. You would need to be sure you could fully recharge the aux battery before trying to use it for the second night.
I understand the earlier Resmed machines operate on 12vDC so can be powered direct from a 12v source. The S9 uses 24v supplied from a 240v AC adapter or a 12v to 24v converter available from Resmed. I don't know how efficient they are probably about the same as an inverter so you may not get any advantage from one of them powerwise and unlike an inverter it can't be used for anything else like charging phone, computers or camera batteries.
Ken
AnswerID: 508898

Follow Up By: Member - Bentaxle - Saturday, Apr 13, 2013 at 12:34

Saturday, Apr 13, 2013 at 12:34
As Keith said, you can get a 12v to 24v converter from CPAP. I have one, and use it with the humidifier when we are free camping out bush without any problems. All I did was change the cigarette lighter plug over to a merit plug to suit the camper trailer sockets.
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FollowupID: 786524

Reply By: Member - Murray M2 - Saturday, Apr 13, 2013 at 01:01

Saturday, Apr 13, 2013 at 01:01
First question I will ask is ,,,, are you a DVA member, if so please answer asap, will give you help
AnswerID: 508902

Follow Up By: Keith H7 - Saturday, Apr 13, 2013 at 10:01

Saturday, Apr 13, 2013 at 10:01
I cannot see the relevance of your question. I thought I joined the forum to seek advice re an sleep apnea machine.... not for you to ask questions about myself. Don't bother Murray.
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FollowupID: 786513

Follow Up By: Member - Murray M2 - Saturday, Apr 13, 2013 at 10:17

Saturday, Apr 13, 2013 at 10:17
oh so sorry, question was asked in good faith as DVA do supply systems for when you travel.
You dont have to get snooty
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FollowupID: 786516

Follow Up By: Keith H7 - Saturday, Apr 13, 2013 at 10:29

Saturday, Apr 13, 2013 at 10:29
Ok... thanks ...
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FollowupID: 786520

Follow Up By: chris g8 - Tuesday, Apr 16, 2013 at 08:17

Tuesday, Apr 16, 2013 at 08:17
hi i have a resmed cpap machine that you can purchase a 12 volt cig lighter adaptor the cpap uses .6 amps per hour
chris
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FollowupID: 786798

Reply By: Jarse - Saturday, Apr 13, 2013 at 09:29

Saturday, Apr 13, 2013 at 09:29
Keith, I'm using a Resmed S9 Autoset, humidifier and heated Climateline with the 12 to 24V converter. I bought the converter to avoid losses when using an inverter.

Depending on whether the humidifier or Climateline are heating, the unit pulls between 0.25A to 5A (on warmup cycle when it will use the most current).

Once the temperatures are stable it draws between 0.3A to 1.1A.

I think that's a little more efficient than using an inverter, but the DC converter cost me about $149 from Resmed. We get gouged in Australia by them....
AnswerID: 508912

Reply By: Member - mechpete - Saturday, Apr 13, 2013 at 09:49

Saturday, Apr 13, 2013 at 09:49
I have 2 mates that use the darth vater mask ,and they run them of the 12v vehicle battery , make sure your battery isn,t nearing its end of life ,
if you use an invertor your battery won,t last the night
mechpete
AnswerID: 508915

Follow Up By: Keith H7 - Saturday, Apr 13, 2013 at 09:53

Saturday, Apr 13, 2013 at 09:53
Do they have 12v darth Vader machines or 240v? If 240V what type of inverter do they use?
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FollowupID: 786511

Reply By: Member Bushy 04(VIC) - Saturday, Apr 13, 2013 at 17:33

Saturday, Apr 13, 2013 at 17:33
My wife uses a Resi med which is a 12v machine and we ran it for three months on a solar/battery system, which worked like a dream.
We had a portable battery pack but that would do one night, then a 4-6 hr 240v recharge.
Handy for an emergency but little else.
Hope this helps,
Bushy.
AnswerID: 508939

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