Deep cycle battery???

[wvbike_99]

Going to need to use a battery for my machine this summer on a weekend up in the mountains. I was wondering if a series 24 or 27 (I have both) would run my machine all night about 7 hrs with the humidifiers running also. My mouth just gets to dry sometimes to try it with just passover. I have a place I can charge my battery during the day. Also do I need anything else other than a battery and a 12v to 120 volt converter or what ever its called. Thanks for your help

[Guest]

Sorry, My machine is a Respronics Remaster Auto A-Flex
That might make a difference as to how you guys might answer my ?
Thanks

[archangle]

Please register on the site, and go to the control panel and list your equipment in your profile.

Does your CPAP machine say "M series" or "Philips" anywhere on the machine? There are at least 3 different machine types that would meet the description of "Respironics REMstar Auto."

Watch out on "marine" batteries. There are true "deep cycle" marine batteries, which is what you want. "Dual purpose", "marine starting", or "Deep cycle/Starting" batteries are not "the real thing" and will have a problem with deep cycles vs. a "real" deep cycle battery. Anything other than a "real" deep cycle marine battery dies a little every time you run it down to a low voltage and "deep discharge" it. Actually, "deep cycle" batteries die a little with every deep discharge, but they die a whole lot less than a non-deep cycle or dual purpose battery.

Running the humidifier is problematic. If you must, try the lowest heat setting.

Using an inverter cuts you run time vs. using the DC adapter option. Using the humidifier cuts the run time even longer. Some inverters put out AC voltage that is not a true sine wave and can damage some equipment. I don't know whether or not CPAP machines have a problem with inverter AC power. Especially watch out for "modified sine wave" inverters. A "modified sine wave" is not a sine wave in any way, shape, or form, but it is better than a square wave inverter.

You probably will have to try the batteries to really find out if they'll run your machine all night. Just the size number is not enough. You need the specs on the actual battery. They will vary widely even in the same size. Often the specs don't give much info. Sometimes the specs are outright lies. If the battery is not brand new, it may not meet the specs any more anyway, especially if it's not a "real" deep cycle battery, or if it hasn't been maintained and kept charged or if it's had a lot of use.

[nanwilson]

Hi there
I use a 12volt marine battery and an inverter, without the humidifier I can get up to 4 days use on it.
If you are going to charge it each day and use your humidifier you should have no problems.
Good camping!
Nan

[DennisG]

From what I can find, the series 27 batteries typically are a bit larger and have a little more capacity that the 24 series, so I would choose the 27.

Both of these batteries should be able to provide 7 hours of service with the humidifier on for a couple of days. If you run your machine at the top end of the pressure range and / or run your humidifier in classic mode, you might not get as much run time.

I would suggest getting this 12V power cord: https://www.cpap.com/productpage/respir ... -cord.html

And this battery adapter: https://www.cpap.com/productpage/respir ... cable.html

This will be more efficient than converting the 12V dc to 120V ac and then the power cord converting from 120V ac back to 12V dc.

Always a good idea to try out your set-up at home before heading out to a place with no power as a backup.

Good luck,
Dennis

[archangle]

Hi there
I use a 12volt marine battery and an inverter, without the humidifier I can get up to 4 days use on it.
If you are going to charge it each day and use your humidifier you should have no problems.
Good camping!
Nan

Can you give us any info about the particular marine battery and inverter, Nan?

[wvbike_99]

From what I can find, the series 27 batteries typically are a bit larger and have a little more capacity that the 24 series, so I would choose the 27.

Both of these batteries should be able to provide 7 hours of service with the humidifier on for a couple of days. If you run your machine at the top end of the pressure range and / or run your humidifier in classic mode, you might not get as much run time.

I would suggest getting this 12V power cord: https://www.cpap.com/productpage/respir ... -cord.html

And this battery adapter: https://www.cpap.com/productpage/respir ... cable.html

This will be more efficient than converting the 12V dc to 120V ac and then the power cord converting from 120V ac back to 12V dc.

Always a good idea to try out your set-up at home before heading out to a place with no power as a backup.

Good luck,
Dennis

Thanks for the links, I think these 2 items will work for me and will also be a good thing to have on hand in case of a power failure. I also haved added my equipment to my profile, I think I got it right.

[DennisG]

Thanks for the links, I think these 2 items will work for me and will also be a good thing to have on hand in case of a power failure. I also haved added my equipment to my profile, I think I got it right.

No problem on the links, hope they work for you.

Thanks for adding your equipment, It works a little better if you select "Text" for how you would like your equipment displayed. Also, it looks like you selected the PR System 1 machine and a "M" Series humidifier?

Dennis

[wvbike_99]

I think I have is straight now. Thanks again

[builta]

From what I can find, the series 27 batteries typically are a bit larger and have a little more capacity that the 24 series, so I would choose the 27.

Both of these batteries should be able to provide 7 hours of service with the humidifier on for a couple of days. If you run your machine at the top end of the pressure range and / or run your humidifier in classic mode, you might not get as much run time.

I would suggest getting this 12V power cord: https://www.cpap.com/productpage/respir ... -cord.html

And this battery adapter: https://www.cpap.com/productpage/respir ... cable.html

This will be more efficient than converting the 12V dc to 120V ac and then the power cord converting from 120V ac back to 12V dc.

Always a good idea to try out your set-up at home before heading out to a place with no power as a backup.

Good luck,
Dennis

Thanks for the links, I think these 2 items will work for me and will also be a good thing to have on hand in case of a power failure. I also haved added my equipment to my profile, I think I got it right.

I think that there is something wrong with your equipment listing. It is not typical that you would use a new PR RemStar System1 APAP with the "older Tank model Remstar humidifier". The humidity control and voltage systems are different and not really very compatable.

If you have either an "M-Series" or "System1" APAP and its integrated humidifier then both the blower and humidifier should run directly from the 12 volt battery. You do not need to use a invertor at all. Just use the two items described by Dennis.

An M-Series APAP goes with and M-Series Integrated Humidifier and a PR SYStem1 APAp goes with a PR System1 integrated Humidifier. (and the old tank style APAP gos with the old style humidifier.)

You know that you can trial using the system at home one weekend and see how it works out for you. That way you will know what to expect. Also remember that batteries are affected by both heat and cold and especially cold will reduce the "useable" power that a battery can store. The mountains an get cold at night.

Remember that you should not discharge a Flooded Lead Acid Deep Cell battery (standard type of large battery) more then 50% of it's rated capacity. Discharging more then 50% will shorten the batteries life.

Cheers

[builta]

I think I have is straight now. Thanks again

All you need are the items that Dennis listed. Again I would suggest a dry run or two before you go camping.

Cheers

[builta]

Hi there
I use a 12volt marine battery and an inverter, without the humidifier I can get up to 4 days use on it.
If you are going to charge it each day and use your humidifier you should have no problems.
Good camping!
Nan

Can you give us any info about the particular marine battery and inverter, Nan?

You do not need an inverter if you are using an M-Series blower and its integrated heated humidifier. 12 volt works just great, I've done it with a M-Series Auto Bilevel for three summers! Never had any issue boon-docking in the National Forests.

Cheers

[archangle]

...

[archangle]

You do not need an inverter if you are using an M-Series blower and its integrated heated humidifier. 12 volt works just great, I've done it with a M-Series Auto Bilevel for three summers! Never had any issue boon-docking in the National Forests.

Cheers

How do you hook the 12 V up to the humidifier? On the REMstar Auto M Series, the humidifier has a different plug with 115V going to the humidifier and 12V going to the blower unit. If you plug in just the 12V, the lights come on for the humidifier, but there's no heat. (I checked.)

Is there some different M series with a different humidifier, or something happening that I'm not aware of here?

[builta]

You do not need an inverter if you are using an M-Series blower and its integrated heated humidifier. 12 volt works just great, I've done it with a M-Series Auto Bilevel for three summers! Never had any issue boon-docking in the National Forests.

Cheers

How do you hook the 12 V up to the humidifier? On the REMstar Auto M Series, the humidifier has a different plug with 115V going to the humidifier and 12V going to the blower unit. If you plug in just the 12V, the lights come on for the humidifier, but there's no heat. (I checked.)

Is there some different M series with a different humidifier, or something happening that I'm not aware of here?

You know I am sure that yo are right. It will depend on the Rev level of the integrated humidifier. If you get a Rev 3 humidifier then you don't need to do anything besides plug the 12 volt into the humidifier and then connect the little patch cord from the humidifier into the blower. The 120 volt humidifiers come with a little cap that you have to plug into the power brick and it has a cord to plug into the humidifier (and no patch cord on the humidifier to plug into the blower.)

Both my M-Series humidifiers are rev 3. They are definitely 12 volt humidifiers--I've used both directly from 12 volt (same with the PRS1 humidifiers8-12 volt.) I don't know exactly when they changed to the 12 volt humidifier but I know Rev 3 is 12 volt.

Am I correct that you have a Rev 1 or 2 humidifier? (it has a water tank with both of the littler rubber connector next to each other -for Rev 3 the two rubber connectors are off set by about 2 inches) See this link for visual of Rev 1, 2 &3 tanks. https://www.cpap.com/productpage/Respir ... amber.html

If you camp and have an M-Series, then I'd suggest that search the auction sites or Craig's list for a 12 volt one (until you find one at a great price).

Cheers