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[Equipment] Off-grid Battery Powered CPAP - my new out of box cheap setup :)
#11
RE: Off-grid Battery Powered CPAP - my new out of box cheap setup :)
Ok im back from work So having time to write.  I call another success.  Rolleyes
It worked another 10 hours on machine,  phone full charge and still 15% left. 
So probably another 1 hour on machine.
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#12
Money 
RE: Off-grid Battery Powered CPAP - my new out of box cheap setup :)
Only one test is left having cpap conected in same time i will be charging it with 5v usb c cable... So in scenario when im only somwhere where 5v is avaliable. It simulates a situation when i would be on a plane or on a train. And want to Save some power. That i do tommorow... For now super happy...
Im curious if smaler battery would handle similar load like
xtpower xt-20000qc3
Is like 1/3 cheaper. You would  probably loose 2-3h but that is still ~10h of cpap usage.

So for now my setup costs me 150Euro (160$) including shipping. I think is hard to go lower. Perhaps with xtpower xt-20000qc3 as it costs 75Euro than full setup would cost ~100euro (110$)
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#13
RE: Off-greed Battery Powered CPAP - my new out of box cheap setup :)
(08-23-2022, 04:24 PM)Crimson Nape Wrote: Turn the humidifier off to prolong the run time.  Also, put it in Airplane mode too.


mumin50 - maybe I missed it, but in your testing was 1) the humidifier turned off and 2) was it in airplane mode also?
SuperSleeper
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#14
RE: Off-greed Battery Powered CPAP - my new out of box cheap setup :)
(08-26-2022, 06:18 PM)SuperSleeper Wrote: mumin50 - maybe I missed it, but in your testing was 1) the humidifier turned off and 2) was it in airplane mode also?


Yes and Yes...
All tests are with the humidifier turned off and airplane mode. Why? Is easy, it saves power... Probably with humidifier on 3 you could get full night (7-8h) from that power bank. 
But for me humidifier almost all the time is off. In case dry hotel room with airco I would probably put a wet towel near my A-10. Not sure how much power is taken with airplane mode off. Probably is minimal usage with airplane mode off... curious what technology is used to transfer data... Lora, GSM or something else... hmm  Thinking-about  didn't set my wifi inside.
But for sure you can't use heated hose with that.

There is still one test left... Using it with CPAP and charging power bank from 5v outlet with usb-c, and perhaps using CPAP + charging phone and charging it with usb-c cable... I have decent 2,5A 5v power brick from Raspberry pi.
As bonus i will try to use other power bank to charge this one, not sure if possible but i have a xiaomi 20000mAH so time to find out   Too-funny
That should cover most of scenerios i can experience...
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#15
RE: Off-grid Battery Powered CPAP - my new out of box cheap setup :)
Ok last test done.
Start values
Battery 96%
Phone 9%

Connected resmed a-10 and phone to output and 2.5A 5V charger to usb C input.

10h sleep later and a full phone im on 93%
So i call it success
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#16
RE: Off-grid Battery Powered CPAP - my new out of box cheap setup :)
So to sumarise:

Plus side 
+++got power for 1-2 nights of cpap 12-16h depending from presure. I have 7-13cmH2O
+++ posibility to charge other devices mobile phone, gopro camera, etc.... (5-24V, on 24v max 80W), at same time as using cpap(!)
++ can be taken to airplane as it is 99Wh, has all German TUV certification...
+++ diferent possibilities to charge it and fast charging. (2-2.5h). 
+can be charged by solar panel (-not included)
++ can be charged when discharging so it can be used as buffor battery and be used as spare power supply in case orginal dies.

Minus side
--hard to get cable for A-10 (but other person in German group showed me where to buy and they are there Big Grin  )
-need to remember to set voltage to 24V. If you use to charge your laptop 19v you need to remember to change it back to 24V.
--no adapter to cpap with set or by producer - that would be nice Tongue
-is not small... perhaps not minus in total... 14x8x4cm

So that is all... if any questions im there.
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