CPAP off grid setups ?

Curious about people’s battery solution, I have been doing research on this now and have kind of settled on a set up that I think is practical. I have a Resmed auto set 10 and was thinking about getting there DC to Dc converter adapter and then adding a 12 volt 35 AH deep cycle battery and a trickle charger.

I would run this with no humidifier, pressure at 11.0 and I think I should get about 3 nights - 8 hr. each before needing charging. Does that sound right?

Please share your thoughts and set ups. I have done a search and saw a lot of good info. Just checking to see the latest and greatest.

 

@crashdb

 

Oh and @Casper66

 

Good recall. I'm just using a 12v adapter that's made for the machine with a jump box that has a 12v plug on it. It was the cheapest solution I could find and it's dual use.

I'd estimate a charged jump box would last two nights, but most of the boxes have a way to charge inside the vehicle.

Another thing I discovered is that the CPAP requires something over 10 volts to work.

 

Yea, I think my Resmed machine is 24v. Thus the converter to notch up a 12 v. Bat. to 24v.

 

My Philips Respironics is 12v. I bought a car cigarette lighter cord and alligator clip cord for it. In my minivan, I run it off one of the 12v charging ports. In the Tacoma, I used a small lawn mower battery. It would run a couple nights and I never ran it out. I plan on buying a jump pack to use since it would be easier to recharge and I can charge my phone and GoPro with it too. My main issue is once it gets colder in the Fall, I freeze my nostrils trying to use it.

 

I have been looking into the jumps also, I have a goolo jump pack but I’m not smart enough with this electric math to keep me from frying my cpap machine, I don’t know if I need a fuse or I don’t know if it’s recommended to stay away from Lipo batts.

 

I don't think one of those little jump packs will work for this.

If you get the actual 12v plug for the CPAP it'll do the transforming for you. I may have misunderstood what folks were saying with the 12 and 24v deal.

 

Whats the watt draw?

Take the watt-hour for the device, multiply by 8 hours then add 20% on top. Then find a battery or power station to match that capacity.

You could go easy and buy a jackery or similar, or you can build your own.

 

What did you do?

 

Found it.

90W power supply unit with a max possible power draw of 100W




So you want a bare minimum of a 500 Wh supply, with an absolute overkill supply of 1000 Wh.

Something like the Jackery 1000, or find yourself a 50Ah 12V battery as your supply.



Edit: I dont run a CPAP, Im just an off-grid battery nerd. I just finished installing a 120 Ah LiFePO4 system in my camper, which gives me all kinds of juice to run my appliances.

 

I also just noticed that the power supply converts to 24V.

A relatively cheap route to go is to take two of these guys and wire them up serially:

ECO-WORTHY 12V 30Ah LiFePO4 Lithium Iron Phosphate Battery Deep Cycle Rechargeable Battery with Built-in BMS, 3000+ Life Cycles, Perfect for RV, Marine, Kids Scooters, Power Wheels, Trolling Motor

https://www.amazon.com/ECO-WORTHY-P...1620753349&sprefix=40+ah+life,aps,664&sr=8-13

That gives you 720 Wh and you can plug in your machine directly without losing energy to a transformer or converter. You just have to find a method to charge it during the day.

 

This will work fine. Run CPAP off of DC to make the battery last longer. $100 off coupon RIGHT NOW. I own one.

GOLABS R300 Portable Power Station, 299Wh LiFePO4 Battery Backup with 300W Pure Sine Wave AC Peak 500W, Car Outlets, PD 60W Quick in/out Solar Generator for Outdoor Camping Emergency CPAP Orange

https://www.amazon.com/GOLABS-Porta...=1&keywords=golab&qid=1620755409&sr=8-1-spons

 

That’s a thought but If I need 2 of those batteries @ $170 a pop. Why not just buy a deep cycle battery that is rated for 12 v 35ah for $100.

 

You need about 70 Ah at 12V, or 35Ah at 24V. (Both yield ~800 Wh.)

I just used lithium as an example, but yeah, lithium batteries are expensive. You could use a pair of cheap lead troller batteries too, but they're heavy.

 

I actually looked at that pretty hard a few days ago and it’s on my short list.Thanks

 

Yea, That’s the trade off......weight vs $.

 

My old Phillips was a 12V Machine, so a lighter adapter worked fine. However, not the water tank (humidified) took power to run. Hence it has a 100W power supply.

I use a Res Med Airmini for bicycle touring. It's a 24V machine, so I carry a LiIon battery pack and my charger. No humidifier.
24V battery (use CPAP power supply to recharge it).

$339 Medistrom Pilot-24 Lite CPAP Battery for ResMed AirMini and AirSense 10 Pap Devices

https://www.amazon.com/Pilot-24-Battery-AirMini-AirSense-Devices/dp/B07C8734MB

The same thing can be used for car camping, but take the 12V to 24V DC TO DC Adapter.
https://www.cpap.com/productpage/resmed-airmini-cpap-dc-converter

The Airmini is great, a little louder than my home machine; the caveat is you need a humidity capture device. This allows you to recycle your moisture, so you don't dry out your nasal passages. Above 50% humidity, no issue. From 20% to 50% humidity, these work great. Lower than 20% (AZ desert), you need that water tank humidifier.

ResMed AirMini™ HumidX™ Disposable Humidifiers - good for 30 days once opened.

$38 HUMIDX 3Pack (Standard)

https://www.amazon.com/ResMed-HUMIDX-3Pack-Standard/dp/B076TGDZHN

The old Jackery turned themselves off after six hours. Grrr. The new ones go 12 hours or so. It seemed they didn't realize CPAP users with electrical storms were a big buyer. My Jackery 250 will last a night on my CPAP & Humidifier. It's an older one that kept shutting down on me but came in handy during the Texas Icestomrs (four days without power). I ended up using the car battery. Those 100Ah Battleborn batteries are overkill but so tempting.

 

Thats what turned me off about the jackery is the reviews they would shut off after a certain point, haven’t look at them since. Now that you state that’s been corrected, I may need to take a 2nd look.

 

I think my gut feeling about a deep cycle battery and a trickle charger is the ticket. Even though those Lipo setups are tits,mostly because there compact and lighter...... @ $300 plus to sit in a draw for most of the yr, not so much. So for half that price with a deep cycle battery and there performance history. Bingo. If I was biking, backpacking, motorcycling the Lipo would be the clear winner.