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08-22-2011, 11:53 AM
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#1
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Senior Member
National RV Owners Club
Join Date: Mar 2010
Location: Spring Lake, Michigan
Posts: 301
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CPAP machine on my Inverter
Hi all,
Rookie Question:
I have a Xantrex Inverter/Charger on my TropiCal T370 DP. I have no manual for it, so I'm flying blind here.
I have severe Sleep Apnea, so I must use my CPAP Machine very night. If we do an overnight at a Walmart or Flying J etc., can I run my CPAP (AC) using the Inverter or must I use my Onan Generator ?
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08-22-2011, 11:59 AM
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#2
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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My CPAP runs just fine off our Freedom 458 (MSW) inverter, yours may not. It depends on the unit. My instructions say not to run off any inverter but their very expensive one if I'm using the humidifier
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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08-22-2011, 12:02 PM
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#3
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Senior Member
Newmar Owners Club
Join Date: May 2007
Location: Somewhere....
Posts: 4,054
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If it's a pure sine wave inverter, you should have no problems at all. Assuming you have enough capacity in your battery bank, of course. I don't know what model Xantrex you have.
If you have a modified sine wave inverter, I would check with your CPAP manufacturer.
We have a pure sine wave inverter, and no problems with my CPAP.
joe
__________________
2008 King Aire 4562, Spartan K3(GT) w/ Cummins ISX 600
2014 Jeep Grand Cherokee Overland 5.7L V8 Hemi w/ Blue Ox Aventa LX Tow Bar and baseplate, SMI Air Force One brake
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08-22-2011, 12:26 PM
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#4
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Senior Member
National RV Owners Club
Join Date: Mar 2010
Location: Spring Lake, Michigan
Posts: 301
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My Inverter is the Xantrex Freedom 458. I've not pressed any buttons on my Wall panel yet, so I'm not sure what the procedure is for using a wall outlet off the Inverter.
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08-22-2011, 12:45 PM
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#5
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Member
Join Date: Aug 2007
Posts: 88
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Does your CPAP machine have an option to run directly off 12v DC?
I can use my Respironics machine with an adapter that plugs in a 12v cigarette lighter socket. I can't use the heated humidifier, but for a night or two it doesn't matter much. I added a 12v socket in my night stand.
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08-22-2011, 03:08 PM
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#6
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Senior Member
National RV Owners Club
Join Date: Mar 2010
Location: Spring Lake, Michigan
Posts: 301
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Coulter6: Yes, it does run off 12v DC, but if I don't use the humidifier I'm sneezing and blowing for days on end. So, I need the AC.
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08-22-2011, 03:33 PM
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#7
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Senior Member
Tiffin Owners Club
Join Date: May 2009
Location: Lacey, Wa
Posts: 630
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Michguy
Any reason you don't want to run your generator?? Look on bottom of CPAP and heater and it should tell you the number of amp hours needed. Once you determine that multiply times the hours you sleep and that will tell you the amps you will drain out of batteries. shouldn't be all that many.
If I'm not hooked to shore power I run my generator.
jack
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08-22-2011, 07:30 PM
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#8
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Senior Member
Damon Owners Club Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 24,024
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The answer depends on several things.
First: How much SPARE 12 volt power do you have.. Each pair of GC-2 six volt batteries provides about 1,000 watt hours of power. (Usable power, figure is rounded) does not matter if it's 12 volt or 120 volt power save for conversion loss.
Xantrex makes many inverters, Some are TRUE and some MODIFIED sine wave.
Some devices object to MSW.. This does not mean your machine will. .Generally heaters (Like the humidifier) and devices which run on wall wart power adapters (sounds like yours does) are happy with MSW. Generally.
__________________
Home is where I park it!
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08-22-2011, 08:40 PM
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#9
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Moderator Emeritus
Join Date: Jan 2000
Location: West Palm Beach, FL. USA
Posts: 27,713
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Running the genset all night would be frowned on in some (many?) places. Could get you evicted even.
__________________
Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
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08-22-2011, 09:16 PM
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#10
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Senior Member
Winnebago Owners Club Workhorse Chassis Owner
Join Date: Aug 2007
Location: Sonoma County, CA
Posts: 6,401
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I have a Magnum 2000 MSW inverter and have the Respironics CPAP with humidifier. I have run it all night on the inverter without any problems. I also have 300 amp hours of battery.
__________________
Wayne & Roberta
08 Winnebago Destination 39W Gas UFO Workhorse Chassis......It's really weird being the same age as old people. I thought getting old would take much longer.
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08-23-2011, 10:09 AM
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#11
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Senior Member
Workhorse Chassis Owner
Join Date: Jun 2003
Location: Palisade CO
Posts: 3,588
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The last time I checked, the Resmed site says their machines require true sine wave inverters.
My Respironics machines say a 300 watt MSW inverter is okay. My last unit was a Respironics Remestar Pro and the current one is a Respironics System One Pro.
The humidifier on both can run on 12 vdc.
__________________
Clay WA5NMR - Ex Snowbird - 1 year, Ex Full timer for 11 years - 2004 Winnebago Sightseer 35N Workhorse chassis. Honda Accord toad.
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