cpap machines

Submitted: Wednesday, Feb 04, 2004 at 22:16
ThreadID: 10283 Views:5412 Replies:10 FollowUps:6
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we wish to do some bush camping. the missus needs to use a cpap machine (She currently uses the Sullivan 5), so i am looking for a power source to run the thing.

Does anyone know if there is a CPAP machine which runs on 12vdc? We have a Waeco Urban power pack and we will be running a fridge.
Any suggestions or help would be greatly received.

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Reply By: Shaker - Wednesday, Feb 04, 2004 at 22:24

Wednesday, Feb 04, 2004 at 22:24
A friend of mine had to use one & had to use a genset.
AnswerID: 45487

Reply By: Eric Experience. - Wednesday, Feb 04, 2004 at 22:40

Wednesday, Feb 04, 2004 at 22:40
I have a mate who runs his machine from his dual battery setup via an invertor. He has done a few trips with no problems. Eric.
AnswerID: 45490

Reply By: Mick - Wednesday, Feb 04, 2004 at 22:53

Wednesday, Feb 04, 2004 at 22:53
Hello Baz, I use a SoloPlus LX. I bought a 12v lead for it. I ran it for 3 nights from a Projecta Jump Start portable power pack without charging in between. I think the power pack was about empty at the end of that trip. I also ran it direct from the vehicle battery each night on a Simpson desert crossing. It uses so little power that it made no difference to starting in the morning. One tip if using it from the car, go direct to the battery and use the shortest possible lead. The starting circuit needs a fair bit of power and I initially had a long lead so that I didn't have to park too close to the tent and it wouldn't fire up properly and ended up resetting the pressure - hassles! The Projecta is the go for me now - can recharge from 240v or the car. Runs it for 2 nights easily and 3 at a squeeze. By the way, I spoke to another CPAP user and he only got 1 night from a power pack so obviously his used more power than mine. From memory mine needs 3 amps to fire up and then runs at just under 1amp. Worth checking before buying!
AnswerID: 45493

Reply By: Member - JEFF - Thursday, Feb 05, 2004 at 07:05

Thursday, Feb 05, 2004 at 07:05
what the hell is a cpap? ? ? ? ?

AnswerID: 45523

Follow Up By: GaryInOz (Vic) - Thursday, Feb 05, 2004 at 11:00

Thursday, Feb 05, 2004 at 11:00
Continuous Positive Airway Pressure, keeps your lungs partly inflated to prevent the nasty side effects of sleep apnoea (your airways closing down and preventing you from breathing when you are asleep, like snoring, but completely closing off). It puts a lot of strain on the heart and causes sleep disturbances as you abruptly wake up from your deep sleep every couple of minutes or so. Thought to be a major contributor to heart attacks.
FollowupID: 307606

Follow Up By: Waynepd (NSW) - Monday, Feb 23, 2004 at 22:16

Monday, Feb 23, 2004 at 22:16
Thank You Jeff
You asked the question for meCheers
FollowupID: 309753

Reply By: Member - Luxoluk - Thursday, Feb 05, 2004 at 09:08

Thursday, Feb 05, 2004 at 09:08
The remstar brand has provision to be run on 12V. Can be run straight off the battery without the need for Generators, Inverters etc. Very reliable and up to the task. If you want more info then happy to respond to your email address. CheersButcher Country Track - Vic
AnswerID: 45530

Reply By: Steve from Armidale - Thursday, Feb 05, 2004 at 09:44

Thursday, Feb 05, 2004 at 09:44
I have a Resmed S6. I run it through and inverter of my second battery (an Optima Deep Cycle Gel cel) which also runs the fridge and lights. I can get two days out of this set up without running the vehicle. However, with the optima, you only have to run the car for40 - 50 minutes for it to be charged from dead flat.

We do lots of remote trips, and the CPAP hasn't stopped me going anywhere!!.

Just as a point of interest, the CPAP draws between 1 amp and 1.75 amps - depending on whether you're breathing in or out. I'd be interested to know what the 12 volt systems draw.
AnswerID: 45533

Follow Up By: Member - Luxoluk - Thursday, Feb 05, 2004 at 18:07

Thursday, Feb 05, 2004 at 18:07
Hi Steve
The RESIMED book quotes 3Amp maximum whilst operating on 12 volts. Given that it is not operating at full whack for me (8) it would be only be drawing about one amp on average (ESTIMATE!!) I based my purchase on this and it was the only unit offering direct 12v feed. Add to this my engel and fluoros etc and the absence of an inverter and you can appreciate why I am content, especially not having to carry more than I need on the longer desert trips. CheersButcher Country Track - Vic
FollowupID: 307645

Follow Up By: Member - Luxoluk - Thursday, Feb 05, 2004 at 18:33

Thursday, Feb 05, 2004 at 18:33
Sorry Steve, that last post should read Remstar, not Resimed.Butcher Country Track - Vic
FollowupID: 307648

Follow Up By: Mick - Thursday, Feb 05, 2004 at 23:33

Thursday, Feb 05, 2004 at 23:33
Luxo, Just so as to not lead Baz and Steve up the wrong path, the Remstar is not the only unit available that will run directly from 12v. I guess it was the only one that you found , but the Solo Plus LX is at least one other that has that facility. Mine needs 3amps for the first second to start and then uses less than 1 amp. I've used it for three nights from an 18amp Projecta Jump Starter without charging. Slept between 7&8 hours each night.
Quick message to all you old blokes who have sleep apnoea .... get one!! They simply splint your airway open from the inside by providing positive air pressure through your nose and prevent you gagging and stopping breathing. Take a bit of getting accustomed to but work well. I even take my touring on the motorbike. (Use powered sites as MC battery is a bit small)
FollowupID: 307706

Reply By: sensei - Thursday, Feb 05, 2004 at 16:54

Thursday, Feb 05, 2004 at 16:54
It has not been said that some Cpap machines required a freq to startup, if you do not have 50Hz it will not start. This is not common for all Cpap machines but only some, it will alter the price of your invertor if you have to buy a full sine wave or mod sine wave.

Just something else to consider before you lay out ya money.

AnswerID: 45568

Reply By: Member - John- Thursday, Feb 05, 2004 at 22:04

Thursday, Feb 05, 2004 at 22:04
I have been running my Sullivan V of a 300W Powerboss inverter from Redarc for about 4 years now on my camping trips and for work. Works just fine. The DC draw by the inverter under load with the CPAP connected rises and falls bbetween 2 and 4A as you breath with the CPAP set at about 9cmH2O pressure.

On a small 36Ah battery I could generally run the camp flouro all evening and the CPAP on the inverter for 5-6hrs. It would not do a second night. The 70Ah on my work truck carries the same plus the fridge easily.


AnswerID: 45618

Reply By: baz - Thursday, Feb 05, 2004 at 22:27

Thursday, Feb 05, 2004 at 22:27
Thanks to all who replyed

AnswerID: 45629

Reply By: wallynett - Sunday, Feb 22, 2004 at 12:40

Sunday, Feb 22, 2004 at 12:40
My husband has sleep apnoe and we have bought a yamaha 1.5kva generator which was recommended by the makers of his machine. Our last camping trip we got 9/12 hours out of the generator which also had a fridge and other battery charging accessories on board as well. The one problem with generators is that a lot of the national parks will no allow generators!!! We wonder how you would go if you challenged this rule on the grounds of a medical condition.
We however have set our sights on finding as many bush camps as possible away from the national parks.
This is a challenge, but and enjoyable one.
AnswerID: 47587

Follow Up By: baz - Monday, Feb 23, 2004 at 21:02

Monday, Feb 23, 2004 at 21:02

i hope i have overcome the problem. I have got a 105 Amp battery and will be using that to power the cp[at and my fridge. I tryed it out at home and the next day there was plenty left in the battery. I intend to charge it when ever the the car is on, so this will extend it.

thanks again

FollowupID: 309730

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