Hi, I'm researching battery packs for the Resmed Airsense 10, I've narrowed it down to the Powapack Atom, EASYLONGER Portable Power Station 266Wh/72000mAh and the ECOFLOW Portable Power Station RIVER 2. I would be wanting to get the most out of it by running it on DC power using the ResMed DC/DC Converter for AirSense. Has anyone used these battery packs for a cpap machine? Any advice welcome-are there any other battery packs I should be looking at?
Battery pack for Resmed Airsense 10
- Thread starter banton
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- Jan 11, 2018
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My other half had a Respireonics CPAP machine.
We run it directly off the have battery in the motorhome.
Had to buy a special lead.
The lead goes from a std power (or. Cigarette lighter) socket to a male plug for the machine.
12v machine power requirement.
It needs relatively little current and runs fine.
We run it directly off the have battery in the motorhome.
Had to buy a special lead.
The lead goes from a std power (or. Cigarette lighter) socket to a male plug for the machine.
12v machine power requirement.
It needs relatively little current and runs fine.
I have run my Airsense 10 from my Bluetti EB70 during 3 power cuts using the inverted mains outlet. It worked very well. Not sure you will save much power by using the 12V DC/DC converter as it will still go through 2 voltage changing devices before it reaches your CPAP. The batteries in your “Power Station” will not be 12V to start with so there is DC/DC converter within the station to reduce the voltage to 12V and the Resmed DC/DC will then convert it up to the 24V the CPAP needs. I would be inclined to save the cost of the Resmed DC/DC and use the supplied mains pack.
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I don’t know much about the Atom but the latest Ecoflow River ones have a LiFePO4 battery which is a definite plus point. They also have a very nifty way of switching automatically from mains power to inverter power in the case of a power cut. Another big plus point for a CPAP user because it will avoid that uncomfortable unexpected shut down in the middle of the night.
I don't have any experience with these medical devices, but looking at the spec it says typical power usage is 53W and max power usage is 104W. So the theoretical maximum time you could run one from a 266Wh battery is 266 / 53 = 5 hours. With all the conversion inefficiencies I would expect you won't get much more than 4 hours out of a 266Wh battery. The three power packs in your list are all similar in size.
Maybe you've already worked this out, but if you haven't it's an important factor. The Bluetti EB70 that Pausim mentioned has a 716Wh battery, well over twice the size, and I would expect will easily last all night, ie over 8 hours.
Maybe you've already worked this out, but if you haven't it's an important factor. The Bluetti EB70 that Pausim mentioned has a 716Wh battery, well over twice the size, and I would expect will easily last all night, ie over 8 hours.
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I’ve run my CPAP machine off my Jackery 1000 explorer on camping weekends no problems and I have 200 watt of portable solar to recharge it up.
John.
John.
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My OH has a ResMed AirSense 10 which we run off the hab battery via a converter (bought from Amazon) to turn the 12 volts available into the 24 volts the machine needs, solar on the roof of the van normally has the hab battery back up to 100% by lunchtime. Saves carrying any additional battery devices. We tend to spend a lot of time off-grid and I needed a solution that would work, this has so far proved to be effective.
I also now have an Air sense 10 after seven years of an auto set 9 and ran/run them both off the 12v through a power converter,the power usage isn't a lot unless you use a humidifier.
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Are you looking at battery power just while you are in the motorhome? Or are you thinking of other situations, like tent camping or power cuts at home? If it's just in the MH, then the leisure battery has much more storage than these power packs you listed.
266Wh is equivalent to 266 / 12 = 22Ah from a 12V battery. A typical leisure battery is 100Ah, which is 100 x 12 = 1200Wh, and many people have two or more of these.
Its for a static caravan that is powered by a very big diesel generator (cant run it thru the night) and with gas for cooking/shower, plus staying in old cottage that runs a small petrol generator (cant run it thru the night) I'm looking for a battery pack that can give me 2 plus nights sleep on a full charge before needing recharged- using a 12V DC connection which gives the longer running times (resmed sell the correct DC/DC Converter for this- so they must approve this method of run their machines.
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A quick calculation show that for 8 hours at 53 watts you'll need 8 x 53 = 424Wh from the battery. Obviously for 2 nights that's 848Wh. Then there's losses due to conversion inefficiencies, at least 10%. And for long battery life it's best to not discharge below the 10% battery level. So you are looking at a 1000Wh battery at least.
I think a lithium battery is best in that it can be charged rapidly and is quite OK discharging down to the 10% level. I would avoid the alternative, lead-acid batteries, which are best kept at 20% or above, and with some even below the 50% level causes some damage. I'm saying this just in case someone suggests a lead-acid battery.
With a 'power pack' you have all kinds of extra facilities you may not need. For example the mains inverter, and the solar charging input. You could buy a 12V lithium battery, say 100Ah (= 1200Wh). And a mains charger with a lithium charging profile. Then attach a wire with a 12V socket and an inline 15A fuse.
You could put them all in a box, with just the mains lead for input and a 12V socket for output.
However a power pack of sufficient size would be an ideal all-in-one off-the-shelf solution if that's what you are looking for.
There are a number of factors that need to be taken into account. If you are using a humidifier and heated tubing the power needed goes up and so does the size of battery you need. Also the pressure you run your CPAP at and the level of humidification you use makes a difference. The Resmed Battery Guide should help you, it includes tables for each machine and even gives suggested 12V Ah battery sizes. I suspect they are assuming daily recharge so you will need to double the Ah figures if you need 2 nights. I use about 60% of my 720Wh in one night with heated tubing and humidifier at a pressure of 10 cm H2O, this would add up to 36Ah at 12V per night.
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