Resmed S9 camping and battery use

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Ravensclown
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Resmed S9 camping and battery use

Post by Ravensclown » Mon Aug 03, 2015 7:10 am

I know this has been covered many times but to save research and time, short answers:
Resmed S9 with a 12v power source (proper resmed one), battery from a car (normal 12v fully functional battery)

Can I use my heated hose and humidifier for a 7 hour sleep from a fully charged car battery. (one night external temp is 8 degrees celcius)

I have previously used a small sealed battery with a non heated hose and humidifier, and had rain out, waking up with my machine not working or a power outage. I would press the start button and the cpap would work, drift off to sleep and wake up with moisture in the mask and the machine switched itself off.

Going camping this weekend and hate the idea of no cpap for the night when I have the power source, the cpap etc.

Any advice.
Resmed S9 with Swift FX

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OkyDoky
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Re: Resmed S9 camping and battery use

Post by OkyDoky » Mon Aug 03, 2015 9:49 am

Here is the ResMed Battery Guide that shows you how many amp hours it would take and how big of battery for each of their machines and humidifier with Climateline hose. http://www.resmed.com/us/dam/documents/ ... lo_eng.pdf
ResMed Aircurve 10 VAUTO EPAP 11 IPAP 15 / P10 pillows mask / Sleepyhead Software / Back up & travel machine Respironics 760

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RogerSC
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Re: Resmed S9 camping and battery use

Post by RogerSC » Mon Aug 03, 2015 10:31 am

Well, feel free to try the car battery. You might try a test run at home to see how it goes before depending on it away from home. Normal car batteries are made to deliver a surge of current to start a car, and then spend the rest of their lives charging. What you really need is a "deep-cycle" battery made to supply constant power until it is discharged, not surges of power like a car battery. To serve this need you can find deep-cycle marine batteries, Li-ion battery packs, etc.

You can read about this here and elsewhere on the internet.

Oh yes, sorry, I forgot the other half of your question. Even though I use the climateline hose and humidifier at home, when I was tent camping I used the slimline hose and used the humidifier with water but without the heat turned on (passive mode). And had a hose wrapper/snugglie that provided insulation for the hose. I didn't experience any rainout, and it worked fine for me for a few days.

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chunkyfrog
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Re: Resmed S9 camping and battery use

Post by chunkyfrog » Mon Aug 03, 2015 12:35 pm

Resmed S9 machines run on 24 VDC, unless you put an inverter between the 12volt battery and your power brick.
Otherwise, you would need more electrical stuff, including the special plug.
And probably an expert, which would cost more than just buying the Resmed-approved power supply.

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OkyDoky
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Re: Resmed S9 camping and battery use

Post by OkyDoky » Mon Aug 03, 2015 12:57 pm

The S9 converter uses energy more efficiently and has other advantages over an inverter. Check out the battery guide above. And here is a link to the converter with info reguarding the converter. https://www.cpap.com/productpage/DC-Con ... hines.html
ResMed Aircurve 10 VAUTO EPAP 11 IPAP 15 / P10 pillows mask / Sleepyhead Software / Back up & travel machine Respironics 760

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CapnLoki
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Re: Resmed S9 camping and battery use

Post by CapnLoki » Mon Aug 03, 2015 12:58 pm

Ravensclown wrote:I know this has been covered many times but to save research and time, short answers:
Resmed S9 with a 12v power source (proper resmed one), battery from a car (normal 12v fully functional battery)

Can I use my heated hose and humidifier for a 7 hour sleep from a fully charged car battery. (one night external temp is 8 degrees celcius)

I have previously used a small sealed battery with a non heated hose and humidifier, and had rain out, waking up with my machine not working or a power outage. I would press the start button and the cpap would work, drift off to sleep and wake up with moisture in the mask and the machine switched itself off.

Going camping this weekend and hate the idea of no cpap for the night when I have the power source, the cpap etc.

Any advice.
A "car battery" is a bad idea. The drain from one night with humidity and heated hose can easily be 35 Amp-hours. A car battery is often listed at about 100 Amp-hours, but starting batteries are considered "drained" when only 30% discharged. In other words, after one night it might not be able to start a car. If you drain if further, you're probably causing permanent damage.

If you get a "Deep Cycle" battery (often referred to as "marine" but they're not the same - it must say "deep") it may look just like a starting battery but it can be discharged 50% or even more many time without damage.

The other issue is that ResMed needs a 24V supply. The best solution for this is a 24-12 volt DC/DC converter, sold specifically for ResMed for about $85. You could also use an inverter, but they are often only 55-60% efficient, so your 35 Amp-hour load becomes a 55 Amp-hour load and even a good deep cycle would only get you through one night.

Although I like the newer AGM batteries, a 100 AH AGM deep cycle can be $180 or more. Walmart, etc, is the best bet for a cheap deep cycle at about $80.

_________________
Machine: DreamStation Auto CPAP Machine
Mask: Quattro™ Air Full Face Mask with Headgear
Humidifier: DreamStation Heated Humidifier
Additional Comments: Pressure 9-20, average ~9.5; often use battery power while off-grid
Last edited by CapnLoki on Mon Aug 03, 2015 2:58 pm, edited 1 time in total.
Hark, how hard he fetches breath . . .  Act II, Scene IV, King Henry IV Part I, William Shakespeare
Choosing a Battery thread: http://www.cpaptalk.com/viewtopic/t1140 ... ttery.html

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RogerSC
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Re: Resmed S9 camping and battery use

Post by RogerSC » Mon Aug 03, 2015 1:01 pm

Good point, forgot to mention the 12V -> 24V DC power converter that ResMed makes. You'll need that to use a 12V battery pack with the S9...

The ResMed battery pack, by the way, is about $700 ($675 on sale), not exactly a good deal for what you get, in my opinion. But if money is no object, go for it:

https://www.cpap.com/productpage/resmed ... hines.html

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Ravensclown
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Re: Resmed S9 camping and battery use

Post by Ravensclown » Tue Aug 04, 2015 7:56 am

I have the 12v power pack though, so surely that can plug into a car battery and see one night out?
Resmed S9 with Swift FX

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Ravensclown
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Re: Resmed S9 camping and battery use

Post by Ravensclown » Tue Aug 04, 2015 8:29 am

CapnLoki,
If I Have one night, with a fully charged car battery, 35 amp hours gets drawn, 100amp hour capability, 1/3 cut out, should get through one night?
I think the cut out mechanism explains why when I used a cheap sealed motor cylcle small battery it kept cutting out, but surely a car battery would last 6-8 hours and then be capable of a jump start the next day?
Great info given so far and great advice, thanks very muchly.
Resmed S9 with Swift FX

NasaE30

Re: Resmed S9 camping and battery use

Post by NasaE30 » Sun Sep 06, 2015 5:21 pm

Forgive me but this is my first post. I might not have all the jargon down right yet.

I have used my ResMed S9 powered by a new Interstate 24f series car battery. Hooked up to a WallMart sourced Shumacer 12v inverter for one night car (8 hrs) camping just fine. Ive done this multiple times now. The most extreme case was a 15deg night no heat in the back of my 4runner. I am a 4x4 enthusiast and love the outdoors. But its dangerous for me to go without my cpap. This is my solution.
I charged the battery back up with a trickle charger no noticeable harm. Now I left the humidifier at home and I dont have any special hose, but I do run high air pressure.

My next step is going to be a Optima Yellow top deep cycle 34 series battery 55ah, same inverter and use the trucks alternator to charge for the next night. I do think with under the right conditions a solar panel could provide enough to top off the battery for another night

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CapnLoki
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Re: Resmed S9 camping and battery use

Post by CapnLoki » Mon Sep 07, 2015 4:13 am

NasaE30 wrote:Forgive me but this is my first post. I might not have all the jargon down right yet.

I have used my ResMed S9 powered by a new Interstate 24f series car battery. Hooked up to a WallMart sourced Shumacer 12v inverter for one night car (8 hrs) camping just fine. Ive done this multiple times now. The most extreme case was a 15deg night no heat in the back of my 4runner. I am a 4x4 enthusiast and love the outdoors. But its dangerous for me to go without my cpap. This is my solution.
I charged the battery back up with a trickle charger no noticeable harm. Now I left the humidifier at home and I dont have any special hose, but I do run high air pressure.

My next step is going to be a Optima Yellow top deep cycle 34 series battery 55ah, same inverter and use the trucks alternator to charge for the next night. I do think with under the right conditions a solar panel could provide enough to top off the battery for another night
First, its good that you're planning to get a different battery since the car battery probably won't last very long used in a deep cycle application. Actually if you only use it one night and then recharge, its not too bad, its sort of like leaving the lights on for several hours or cranking the engine for 10 minutes. Do it a few times and you won't notice, do it 20 times and the battery may be worn out. You should not expect a starting battery used this way to be able to start a car on a cold morning!

The Optima is a good choice (I have two "Red Top" starting batteries on my boat) but nowadays there are numerous cheaper options for quality AGM batteries. Instead of using an inverter, you should invest in a 12 Volt converter by Resmed ($85) which would reduce your power usage almost in half. That way, you could use a considerable smaller battery for the same net power.

You should check out this document from ResMed:
http://www.resmed.com/assets/documents/ ... lo_eng.pdf

_________________
Machine: DreamStation Auto CPAP Machine
Mask: Quattro™ Air Full Face Mask with Headgear
Humidifier: DreamStation Heated Humidifier
Additional Comments: Pressure 9-20, average ~9.5; often use battery power while off-grid
Hark, how hard he fetches breath . . .  Act II, Scene IV, King Henry IV Part I, William Shakespeare
Choosing a Battery thread: http://www.cpaptalk.com/viewtopic/t1140 ... ttery.html