Cpap machines

Johnmac · Member

Cpap machines

KFT · Guru

G'day Jmac

I cannot help you with your enquiry BUT there are lots of cpap users on here and I am sure if you are patient someone will pop in and give you an answer.

frank

Woody n Sue · Guru

Umm Am not even sure what a cpac machine is but if it is 12 v / 24 v / 240 v as you say then why are you using an inverter can't you just plug it into the 12 v in your van
Woody

exa41 · Guru

I presume that 240 volt is 50hz , but is the 12/24 volt a/c or d/c ,and what sort of current draw is the machine. I read somewhere that it required 400hz power supply ?

brickies · Guru

I have a Resmed 9 which I use off an inverter , I do not use the humidifier when on the inverter , Mine is 19 volt and can not be run off 12 volt , You can buy the adaptor for $150 to run it off 12 volt but I found an inverter at $65 was a better way to go has you then can use the inverter for other things like charging phone or running a computer

Woody n Sue · Guru

Try this link
www.cpapaustralia.com.au/pop_faq/resmed-dc-12v-24v-s9-model-converter-36970.html

Big Gorilla · Guru

I leave mine at home when I go traveling. I'm not prepared to pay an arm and a leg for a 240/12 volt step down transformer. I've also found that using the CPAP for a considerable time, I can now sleep quite comfortably without it. Different of course for GNs on the road full time, it would pay to invest in the transformer.

aussie_paul · Guru

These are the specs of my Philips Respironics REMstar Pro C-Flex+. Unfortunately the strange input has two 12 volt sections for different jobs. Next time I have to order masks etc from the US I will get the 12 volt adapter which is much cheaper. With my 300 watt inverter the inverter fan runs continuously using the heated tube and humidifier, and does not run at all without the humidifier.

Aussie Paul. smile

Philips responics System one specs.jpg

woolman · Guru

My wife has a CPAP and I worked out that the 12 adapter (running off cigarette lighter) used more power than connected via a inverter. I was surprised until I identifies that the 12 v adapter maintains 12v, not 12.5. the CPAP does not like more than 12v. I believe that the type/quality of inverter reflects how much power is used at a low draw more than the draw of the machine. Some inverters I have looked at draw more than CPAP with nothing drawing.

That is my experience and in discussions with CPAP operators.

Neil

PeterD · Guru

brickies wrote:
You can buy the adaptor for $150 to run it off 12 volt but I found an inverter at $65 was a better way to go has you then can use the inverter for other things like charging phone or running a computer

There is no absolute "correct" way to solve lots of problems. It can be cheaper to use an inverter to purchase an inverter than the Resmed adaptor. This may be OK if you have plenty of battery power to spare. In my case I don't have lashings of battery power so I prefer to purchase direct chargers/converters as these only waste one lot of power instead of the two lots when you run an inverter. The choice of direction is a value judgement that each person has to make.

John, the way I would go is to purchase the converter. To find out how much 12 V power it will draw you will have to refer to the publication that is mentioned in the link that Woody & Sue gave you - http://www.cpapaustralia.com.au/resources/file/19825_battery-guide_glo_eng.pdf - You will note that there is a huge range of currents depending on the setting you are using. If you are ony camping for short periods of time see how much you can wind the settings down and still function OK during that period (particularly if yor battery supply is limited.)

sarg · Guru

I have the same CPAP machine as Aussie Paul and have very bad sleep apnea. I need the machine all the time that I sleep. Even a Poppa nap in the arvo. I plug in direct to my 12 volt supply in the van. It uses very little power. I have 2 X100 amp hr batteries. And am on the road full time. I've had no problems with it in the last 16 months and think it is the best thing I've done in a long time.
I don't use my inverter at all.

iana · Guru

John Mac, a bit rude for an introduction.
Since I know nothing about C-pap machines, I did what you could have easily done and went to the makers web site.
Looks like the converter is also a back-up battery pack. When fully charged gives about 4 hours of use.
The humidifier when used on 12v does not use heat.

www.resmed.com/ap/en/consumer/support/therapy-and-maintenance/traveling-with-your-equipment.html
www.resmed.com/au/dam/documents/products/accessory/power-station-ii/user-guide/248795_power-station-ii_user-guide_row_eng.pdf
www.resmed.com/au/en/consumer/support/accessories/resMed-power-station-ii-rps-ii.html

03_Troopy · Guru

The 12V to 24V converter for $150.00 doesn't have a backup battery in it, it is only a dc-dc converter. As PeterD pointed out, it uses less battery power than running the Resmed from an inverter and the resmed 240V power pack converting it back to 24VDC.

Johnmac · Member

Thanks to those that really made an effort to help.How silly of me not to look at the makers web site, guess that's why I'am on here because I don't know something and I,m trying to find out.Sorry if you think I was rude but read some of the last few posts and you may come to the same conclusion as me.

Cruising Cruze · Guru

Hi Jmac

have a look here

www.youtube.com/watch

I hope this explains it a bit more

Cheers John

03_Troopy · Guru

Cruising Cruze wrote:
Hi Jmac

have a look here

www.youtube.com/watch

I hope this explains it a bit more

Cheers John

His is a Resmed S9 though John, which actually runs off 24VDC, supplied by either a 240VAC to 24VDC power pack, or a 12VDC to 24VDC dc-dc converter

Ondabeach · Senior Member

Jmac, if your Cpap can run off 12v then run it straight off the battery, that'll be much more efficient than running it off the inverter.

03_Troopy · Guru

it'll run off a 12V to 24V converter, not straight from 12V

brickies · Guru

All Cpap Machine are not the same so you need to workout whats best for your model , I do know Fisher and paykel cpap machine will work off 12 volt , But Resmed will not and needs to use a converter or inverter

Johnmac · Member

Once again thank you to every one for your advice.After checking most points, going to run with a converter from Resmed.
Nice to get good advice,but to the smarties that want to score get a life.

Johnmac · Member

Once again thank you so much for your help,I,m going to run with the Resmed converter. To those who have nothing better to do than make smart arse comments,please get a life.

gitsho · Senior Member

Hi sarge, I am just about to go down that track for a machine, would love to talk to you about machines etc. Rgds gitsho

BruDi · Senior Member

My husband uses the same CPAP machine as you and we bought the Resmed converter for use when away from electricity. He does not use the humidifier then. He has found his interruptions increase but only to about 2/hour compared to under 1/hour. He can live with that and so can I. From memory I think it cost somewhere about $140-$150.

DI

Possum3 · Guru

several months ago I came across this article about a CPAP that uses small hearing aid batteries and has no mask just a nose piece - he was looking for funding - perhaps he is marketing now.
www.fundairing.com/

Two Strays · Senior Member

Navigator (wife) has Resmed machine. We have a 12volt inverter running off the house batteries. When free camping she does not use the humidifier. This saves heaps of power. Hardly any power drain. Happy caravanning