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Old 08-28-2015, 12:56 PM   #1
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Cpap

I have a 2000 Excella with two 12 batteries. I'm clueless about electrical stuff . Is there a way too run my cpap while boondocking. It draws 5 amps.

Thanks for any help. Steve
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Old 08-28-2015, 01:06 PM   #2
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Your CPAP probably runs on 115VAC so you'd need to run your inverter to convert the 12 VDC battery power to the 115VAC. How long you could run would depend on the amp hour rating of the batteries and the efficiency of your inverter. Do you have a generator or solar panel(s) that would recharge during the day?
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Old 08-28-2015, 01:17 PM   #3
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Contact your supplier, they should have a 12V adapter.

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I have a 2000 Excella with two 12 batteries. I'm clueless about electrical stuff . Is there a way too run my cpap while boondocking. It draws 5 amps.

Thanks for any help. Steve
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Old 08-28-2015, 01:24 PM   #4
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I'd say it's unlikely that your CPAP actually DRAWS 5 amps. Probably (like mine) it's RATED for 5 amps including the humidifier and in normal use draws much, much less depending on the pressure settings and ambient conditions. I bought a big honking 100 amp-hour AGM battery and an efficient pure-sine inverter to run mine when boondocking, because my vintage trailer has just one battery.

What I should have done instead of believing the specs is used my Kill-a-watt and actually MEASURED what the thing uses. I sized the battery thinking I might get 8-10 hours of run time out of it. I find that I can actually run it 3-4 consecutive nights on that battery before the inverter complains of low input voltage!

My CPAP is a Resmed S8 Compact with the humidifier, and I only need a fairly low pressure setting. If/when I get another unit, I'll look for one that will accept a 12v DC input, but I find that with a good inverter I don't have any trouble with my current setup. I have a 600W Xantrex Prowatt SW600 and could have gotten by with a smaller inverter as well, if that's all I wanted to do with it.
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Old 08-28-2015, 04:04 PM   #5
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I tried using my clap on batteries. I bought the 12 volt adapter. I felt like I was going to smother.
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Old 08-28-2015, 04:05 PM   #6
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That was Cpap not clap! Lol!
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Old 08-28-2015, 04:25 PM   #7
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This helps. Thanks, Steve
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Old 08-28-2015, 04:49 PM   #8
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I use a Resmed BIPAP. I have planned on getting a 12v adapter but I presently have an inverter which allows me to run my bipap as long as i leave my humidifier off. I usually run my generator a couple of hours per day while boondocking to top batteries off. No problems so far. Still may get the adapter as a backup.
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Old 08-28-2015, 04:56 PM   #9
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My CPAP has a 12 volt adapter. It actually uses 24 volts so the adapter steps up the supplied 12 volts to the needed 24 volts and all is good. I'm not 100% positive but I would think this is more efficient than using an AC inverter and then having the AC adapter step the power back down to 24 volts. Check your CPAP manufacturer's web site. The 12 volt adapter cost about $80. Mine is a ResMed AirSense 10.
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