Cpap and camping

first, you mention it uses 12V 6.6A. if it has a 12V input, which is very very very common, you don't need an inverter, just a 12V adapter plug.

Second, it likely only draws about 2A on 12V or even less. My advice is that if it has a humidifier, turn that feature off it at all possible. that is the biggest power draw. Same with any wifi it may have or tube heater. Manual will tell you how to turn that off.

Then, you can run it off a 12V outlet in the trailer and you should be able to get multiple nights off even a single 12V battery.

I have a resmed cpap. with the humidifier turned off it uses about 6AH or less in a night. thats less about a 1A draw. I can run it 3 or 4 nights off a 250WH (20AH) lithium battery pack.

Don't know the AH of a group 27 but say it is near 100AH. drawing down to 50 percent is 50AH so you could go 3-4 nights. Now, more than likely other things you use will draw more each day.

Now if you use the humidifier, you will likely draw around 25-30AH, still ok for a single night.

you can get a 12 volt power cord from phillips direct or from most of the cpap supply shops. just have your model info, cost should be anywhere from about $20 to maybe $45.

IP22? I cannot locate such a model. Double-check, then look at the Philips website or someplace such as CPAP.com to see if there is a 12V cord available. I have a Philips and can use its 12V cord in the RV. I did use it once with a small portable inverter and that worked OK.

The 12v cord for my CPAP is like $150. Pretty ridiculous. The 12v plug in my trailer can't handle the portable inverter that I have. It draws too much power when running the CPAP. So I have a spare deep cycle battery that I put in the pass through and run the 110v plug through the laundry chute access. I plug it into the portable inverter in the pass through. The cycling fan of the inverter doesn't bother me any more. And I've never drained the battery to where it stops the CPAP.

Why cut it close? Get two good golf cart batteries.

Ditto what the others are saying. I got a 12v power brick from my CPAP's manufacturer, and installed a dedicated 12v outlet in the bedroom to power it. When I'm dry camping, I disconnect the humidifier unit. When I have shore power, I use the humidifier. With just the CPAP and no humidifier, my two Group 27 batteries can let me use the unit for more than a week without draining.

The OP I think seeks a "recipe".

First of all my Respironics went NUTS on cheap inverter power. The images in the display window looked like Sanscrit. No Way Jose, will I ever try connecting to modified sine wave inverter again. I do not want a broken BiPAP.

So I decided to go direct. 12 volts from the coach to the socket on the BiPAP

• I took the power brick cord along to use the plug as an example of what I needed to buy
• A laptop repair service is a perfect place to have the plugs installed on a custom length cord
• But you will need the other end of the cord opposite the plug that goes into the cPAP
• Don't buy junk and 99% of do it yourself plugs are junk
• See my recommendation for a great quality cigarette lighter plug below
• The laptop repair place will SOLDER both plugs onto your new custom length power cord
• It will not pull apart.

https://www.bluesea.com/products/1010/12_Volt_Plug

LOOK in Amazon for this plug ---Blue Sea Systems 12 Volt Plug---


Now for the twin wire. not too big, not too small. Need very supple wire that is not glaringly obtrusive. Supple means it will be easy to wind up and will lay flat on the floor. Just in case you need to run wire to a distant cigarette lighter socket...

http://www.ebay.com/itm/SPEAKER-WIRE-50-FEET-18-Gauge-High-Quality-For-Car-Home-USA-SELLER-FAST-SHIP-/170879645576?hash=item27c9387788:m:myd8tew7JqMvoaEQnPhVv8Q

Carry everything into the laptop repair place and plunk it onto the counter. Being you have already measured out how long a wire is needed the rest of the work is in their hands, not yours.

"Just right size" means you can use this wire without or with the cPAP humidifier going. The price of the long length of this wire won't kill your budget.

Finally, when you go to pick up your assembled cable, take the cPAP along. Proof that it works right on the counter.

And yes the Blue Sea cigarette lighter plug is worth it. Lesser plugs are junk and you do not need to deal with a plug that fails.

I just checked mine and found that the IP-22 the OP mentioned is the 120 VAC converter. I have a Phillips Respironics System and has the same converter. You can get a basic 112 volt cord from someplace like www.cpap.com

use humidifier in pass over mode
bumpy

MEXICOWANDERER wrote:
The OP I think seeks a "recipe".

First of all my Respironics went NUTS on cheap inverter power. The images in the display window looked like Sanscrit. No Way Jose, will I ever try connecting to modified sine wave inverter again. I do not want a broken BiPAP.

So I decided to go direct. 12 volts from the coach to the socket on the BiPAP

• I took the power brick cord along to use the plug as an example of what I needed to buy
• A laptop repair service is a perfect place to have the plugs installed on a custom length cord
• But you will need the other end of the cord opposite the plug that goes into the cPAP
• Don't buy junk and 99% of do it yourself plugs are junk
• See my recommendation for a great quality cigarette lighter plug below
• The laptop repair place will SOLDER both plugs onto your new custom length power cord
• It will not pull apart.

https://www.bluesea.com/products/1010/12_Volt_Plug

LOOK in Amazon for this plug ---Blue Sea Systems 12 Volt Plug---


Now for the twin wire. not too big, not too small. Need very supple wire that is not glaringly obtrusive. Supple means it will be easy to wind up and will lay flat on the floor. Just in case you need to run wire to a distant cigarette lighter socket...

http://www.ebay.com/itm/SPEAKER-WIRE-50-FEET-18-Gauge-High-Quality-For-Car-Home-USA-SELLER-FAST-SHIP-/170879645576?hash=item27c9387788:m:myd8tew7JqMvoaEQnPhVv8Q

Carry everything into the laptop repair place and plunk it onto the counter. Being you have already measured out how long a wire is needed the rest of the work is in their hands, not yours.

"Just right size" means you can use this wire without or with the cPAP humidifier going. The price of the long length of this wire won't kill your budget.

Finally, when you go to pick up your assembled cable, take the cPAP along. Proof that it works right on the counter.

And yes the Blue Sea cigarette lighter plug is worth it. Lesser plugs are junk and you do not need to deal with a plug that fails.

very good advice.

when I did my install, I used the blue sea 12V receptical, that way I got a reliable robust receptical. and then I wired it through a 10A fuse with 12ga wire using marine jacketed wire which is tinned and very fine strand to a breaker in the pass through where I have inverter, solar panels etc. wire from west marine. they carry quality low voltage wire. Then for my first cpap I bought the mfg 12V adapter plug, which is a cig lighter and jack. For the resmed unit, 12V is a NO NO. they run on 24VDC, In fact most of the new units from virtually all mfg run on either 12VDC or 24VDC. NEVER on 120VAC. the 120VAC plug just goes to either a DC converter block that plugs into the unit, or into a internal 120VAC to 12V or 24V DC converter.

For the resmed I went to battery power solutions and bought there 12VDC to 24VDC converter designed specifically for the resmed. Resmed also sells one, but for about 5x the price. And in the past Battery power solutions sine wave inverter and Lithium Ion battery packs have been very robust and reliable for me.

they sell adapter plugs and sine wave inverters for most any recent cpap or bipap machine.

course there stuff is easy to come by in the states, But as so many things, much more of a problem for Mex, down south of the border.