uninterruptible power supply and air sense 10

I am now running my Resmed AS10 in "automatic on and off mode" after reading postings about users losing the function of the mechanical on/off button. I'm saving the future button functionality, I figure.

The AC power is going down for a few seconds/minutes etc. from time to time and I was surprised to see that the machine automatically came back on when the power was restored after a few seconds (I am only guessing it did that, because I was asleep at the time and didn't wake up). On at least one occasion. Hey!

Not being satisfied of course with that success,`--- I dug out a very old APC 400 "UPS", with some difficulty put in a new replacement battery (sealed lead acid 9 Ah) and hooked it up in advance of the Resmed AS10. For calculation purposes, suppose the machine is set up very simply as CPAP only, 10.0 pressure (10 inches H2O ?), regular non-heated hose, and humidifier off. And every thing seems to work!!! I am congratulating myself because nothing I ever do in this fashion (cheapness) seems to work out as well as this or work at all.

I now! have decided to read the manual, the Resmed "Battery Guide". And it seems to say that one should not use an inverter with the AS10----Ok to use an inverter for the S9 and it provides S9 inverter battery tables but the Resmed manual "Battery Guide" does not seem to include the AS10 in the inverter section, and does not include inverter battery tables for the AS10. The APC 400 UPS, along with other UPS's, uses an inverter and transformer along with switches and a battery charging system.

Does Resmed approve of the use of inverters to power the AS10 somewhere else, perhaps?

Why do you think an inverter would harm an AS10 but not an S9? Cheaper wiring maybe?

So I was hoping that someone could give me a hand because I am still a newbie and not all that good with all the techy stuff concerning electricity.

What do you think?

afaik - Most cpaps will re-start after a power failure.

I think you would be better off to buy the DC cable for your cpap and connect right to the battery.
The cpap uses DC power so converting DC to AC (that's the inverter) then back to DC (that's your power cord) is just using excess battery power and 9AH is not that big.

Thank you sleepgeek; I agree. yes----- i am also on the complete alternative power quest, perhaps more about that later, and about to order just that dc to dc connector primarily to work in my car and agree that the battery method, which Resmed prefers over the inverter method, would work perfectly in my bedroom too. However it's the cheapness function that also brought me to the UPS solution---the fact that I had one on hand.

If I can avoid it, I don't really want the trouble of setting up the battery charging system in my bedroom and always running on battery What I liked about the possibility of using the UPS, was that it just cut in to cover the isolated and infrequent power outages, just like it would for a computer and then sent me back on the AC when power was restored. Although I'm not sure that the APC 400 UPS does it well or does it at all, I had the idea that the APC 400 UPS would smooth out any rough patches in the AC as well.

The 9 Ahr battery might probably even get me through the night, if I was running a simple system---according to the "Battery Tables" set out in the Resmed "Battery Guide", if the UPS inverter/transformer didn't take too much of a tax. What do you think? I read somewhere that the Resmed guide as to the amps used by the AS10 was an over-estimate when someone actually put a meter on it. I think is was a factor of 2!

Of course the obvious solution is to resurrect my spare S9, (to which I would have do a little work)---but I would like to work with the AS10 because it sends the Rera data to the sd card and you can view it on Oscar and the S9 doesn't do that.

If you worry about power going out during the night. you can buy a battery pack, portable outlet 160 ups. all you do is plug in with the cord you use now to the battery. the cord that comes with it goes to the house ac power. if you loose power. the battery takes over. I just bought one. its in the mail. I'm going to use it for camping with the air sense 11. it last 14 hours running on air only. what's nice about it. you don't have to buy another expensive dc cord to connect to it. I paid 300 dollars for it. a little pricey. but that's all I can find to run the air sense 11.

hey Ray i'm with you in the utility of a UPS What concerns me with the AS10 (you have the AS11 !), is that Resmed does not approve of using an inverter on the AS10 and a UPS is basically an inverter with software. What does Resmed say about the AS11 and inverters?

After Sleepgeek's post, I reconsidered the whole thing and decided there is no sense in arguing with the mfg. So i pulled off the AS10 and replaced it with my back-up S9. There is no use in destroying the AS10 just as an experiment to contest Resmed's instructions---at least until I know more and can get some more comment! More later, but at least, the S9, at first blush, seemed so much lighter, quieter and more convenient than the AS10! The Resmed transformer (black thing) was barely warm in the morning!

Using a DC-DC converter is obviously the preferred choice over an inverter for efficiency. It's not a ResMed supported option yet for the Air 11 yet, but a few have commented that the Air Mini DC-DC converter works with the Air 11.

Having said that, Air 10s have commonly been used with inverters since their inception (Pure Sine, Modified and Square wave) and not once have I seen a post about damage to the device.


Air Mini / Air 11 DC-DC converter post:

Scott_G wrote: ↑

Tue Nov 02, 2021 5:39 pm

Dog Slobber wrote: ↑

Tue Nov 02, 2021 10:42 am

Bumping this topic to report that an individual on ApneaBoard has confirmed that the AirMini DC-DC converter works with the Air 11.

And... A full 9.4 hour overnight usage test, from the same individual (me), with humidifier and heated hose active:

I used it last night for 9.4 hours. Worked perfectly.

To be specific... That's the "Resmed AirMini 65W DC/DC converter (p/n 388389)", powered by a fully charged 12V AGM battery, and connected to a Resmed AirSense11 Autoset with the humidifier and heated tube active (Climate "auto", tube 84F). Worked exactly as it does from the 65W AC/DC adapter all night long.

Regarding the humidifier and heated tube.... I'm using a large capacity (55Ah) battery, so I can get 2-3 nights WITH the humidifier and heated tube running. With smaller capacity batteries, turning off the humidifier and heated tube may be necessary to get a full night's usage.

I checked with Resmed 3 months ago. I told them what I wanted to do with the air sense 11. at the moment. I can't get the dc adapter for the 11. they said it will be out later 2022. I have a good quality pure sine wave inverter now. 300 watts. it will power the 11 with no problem with air only. the problem with the 11 is. if I use it with the inverter using the full 65 watts I could damage the mother board with changing pressures. you can buy the dc adapter for the air sense 10 now. I wish they had it ready now for the 11. I prefer the dc adapter over the compact battery, because I can get more capacity out of a 100 amp lithium battery. 1200 watts compared to 160 watts with the portable outlet. right now I'm stuck with the portable battery. if you want more info on the battery. go to portableoutlet.com. you have all the info you need. its on sale now for 300 dollars. cpap shop.

thanks for your input Dog and RAY

Currently both Medistrom Pilot 24-lite and and BPS Freedom V2 have the cable kits that work with the AirSense 11.