CPAP Advice

Discussion in 'Mech Tech' started by Robert Thomas, Jun 8, 2017.

  1. Hi I have to use a Resmed autoset spirit S8 CPAP device and am having to camp non hook up.
    I've got a very young fully charged 70ah leisure battery and I've just bought a Ring 300w inverter
    Can anyone tell me how long it'll last


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  2. I don't think I understand any of that...!
     
  3. You need to find out how much power the cpap device uses.
     
  4. Poptop2

    Poptop2 Administrator


    I presume this is a piece of medical equipment that the OP uses and he is asking how long it will work off a 70ah leisure battery through an inverter . I imagine it depends on the amount of amps the equipment uses.
     
    Last edited: Jun 8, 2017
  5. I know nothing of what it does, or how long it will last without power data.

    However, a google shows it can run off a 12v lead, suggesting it might be more battery friendly to do away with the step up invertor before it steps it down again to 12v anyway....
     
  6. You can buy a led from Resmed and I will but that won't be in theme for this weekend. Normally I hook up.

    I can't find any info on current draw


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  7. You can buy a led from Resmed and I will but that won't be in theme for this weekend. Normally I hook up.

    I can't find any info on current draw


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  8. Would a solar powered charger not help maintain battery life?

    Edit: now I know what it is and that it would likely be used at night probably not! At least it would top up in the day?
     
  9. Baysearcher

    Baysearcher [secret moderator]

  10. ron

    ron

    i would imagine in the world of electrics V x I = watts therefore at full capacity your invertor would draw 1+amp now as yolts /amp s are relative 1 amp at 240volts would be 20amps at 12volts assuming your battery doesn,t fail till its completely exhausted that would be 3 1/2 hours
     
  11. nicktuft

    nicktuft Supporter

    Draw is 110v-240v , 50-60Hz < 120VA. For the Resmed
    I don't understand how to translate that into watts or amps.:(
     
  12. Are you saying it won't get through 1 night?


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  13. ron

    ron

    thats at maximum power according to nicktuft your resmed takes 120va that would be 1/2 amp or about 7 hours
     
  14. Just 7 hrs? For a fresh battery?


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  15. 120 VA seems high. ive lost the link now!
     
  16. ironically I initially thought the thread title was CRAP advice. I seem to be doing well!
     
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  17. Baysearcher

    Baysearcher [secret moderator]

    Depending on how important this machine is, I'd probably be doing a bit of research with the supplier / manufacturer rather then a load of blokes on a VW forum.
    Just saying.
     
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  18. [​IMG]

    Mines the s8 autoset spirit but I'm don't quite understand what this chart means in real terms

    I.e. Will I live till morning for 2 nights 6-8 hrs per night with a 70ah battery


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  19. Good advice but too late. Anyway I trust you lot. It's only a matter of getting through the night and seeing the morning!


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  20. look at the chart linked to above..which model is it as those figures are all over the shop!
     

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