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Apap to CPAP for camping, settings question.
#11
Hi DavePaulson,
WELCOME! to the forum.!
Good luck to you with CPAP therapy and hopefully, your camping trip gose well.
trish6hundred
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#12
(05-21-2017, 03:23 PM)DavePaulson Wrote:
(05-21-2017, 03:12 PM)Sleeprider Wrote: You will definitely need the Resmed S9 DC converter to run on a battery.  Using an inverter would be very inefficient.

I need the battery to last a week so an inverter is out of the question.

I missed your other question. I have another machine set up to run on 12 volts already and I would rather not buy the converter for the S9 if I don't have to.

That clarifies things.  About the best I have seen is 2-nights on a 36000 mAhr Li-Ion battery at your pressures. So you would need 2-3 of those, or a couple deep cycle batteries, or one with solar recharger and a lot of luck.
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#13
(05-21-2017, 03:23 PM)DavePaulson Wrote: I need the battery to last a week so an inverter is out of the question.

I would just use the older machine that runs on 12 volts, set the pressure to somewhere around 16 or 18, and get a solar charger for the battery.

By the way, you are very often hitting the 18 cm pressure ceiling. I would change that to 20 and see what happens. Unless, that is, the higher pressure bothers you.
Sleepster
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#14
Sleepster has a good point, not to mention there are hazards of a canoe trip that could end badly for a CPAP machine if you don't properly protect it.
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#15
I have a large deep cycle that should make it five nights. I will be testing it before I  go. I will up my machine pressure to 20 when I get back from this trip and see what happens.

Thanks,


Dave
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#16
(05-21-2017, 03:43 PM)justMongo Wrote: And that machine is a CPAP.

here's your imgur charts inline

It is indeed. Thanks for posting my pics as I was unable to because I had too few posts.

Thanks,

Dave
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#17
(05-22-2017, 08:48 AM)DavePaulson Wrote: I will up my machine pressure to 20 when I get back from this trip and see what happens.

Just to be clear, your machine is now set at a pressure range of 13-18. What I recommended is changing it to something like 13-20. Then look at your pressure graph and see if the pressure is still reaching the maximum of 20 as often as it used to hit the maximum of 18.
Sleepster
Apnea Board Moderator
www.ApneaBoard.com


INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
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#18
(05-22-2017, 10:20 AM)Sleepster Wrote:
(05-22-2017, 08:48 AM)DavePaulson Wrote: I will up my machine pressure to 20 when I get back from this trip and see what happens.

Just to be clear, your machine is now set at a pressure range of 13-18. What I recommended is changing it to something like 13-20. Then look at your pressure graph and see if the pressure is still reaching the maximum of 20 as often as it used to hit the maximum of 18.

Yep, that is how I understood it.

Thank you,

Dave
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#19
Consider something like ECO-WORTHY 40 Watts 12 Volts Semi Flexible Monocrystalline Solar Panel for Battery Charging

Even on a overcast day it will add to battery life. Waterproof and bendable.

Have fun and Sleep-well

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#20
I did decide to splurge on the S9 converter(I sleep better with this machine), on the third night of my battery trial, so far so good. I did find a very good battery calculator from Resmed in the private files here. It says that my machine at my settings, the way I intend to use it, uses 1.14 amps. I have a 7-year-old deep cycle that is rated for 115 amp hours, if its half as good as it once was I should be good. The test continues.

Dave
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