Best Portable Power Station for CPAP 2026

If you use a CPAP and you live somewhere the power goes out, or you camp, or you fly with the machine, you have probably worked out that the honest question is not which power station is best. It is how many nights a given battery actually gives you, and every answer you find online is computed the lazy way. This guide from E-Commerce Paradise does it properly: every runtime below comes from usable watt hours at a stated efficiency, and every draw figure comes from a manufacturer document I pulled this session and named in the text.

Before anything else. I am not a clinician and nothing here is medical advice. I am showing you arithmetic on published electrical specifications. Confirm any backup power setup with the supplier who provided your equipment or with your clinician before you rely on it, and do not treat a marketing line about a device being suitable for medical equipment as any kind of approval. No portable power station in this article is a medical device, and none of the manufacturers claim it is.

Four Nights of CPAP, Computed Not Guessed

The Bluetti AC200L holds 2,048 Wh nameplate, which is 1,741 usable watt hours at 85 percent inverter efficiency. Against ResMed’s published typical draw of 56.1 W for the AirSense 11, that is 31.0 hours of running time, or just under four nights at eight hours each.

See Bluetti Capacities →

What a CPAP Actually Draws

Almost every figure quoted in articles about this is either invented or lifted from a forum. The real numbers are in the manufacturer’s user guide, in the technical specifications section, and they are unambiguous.

The ResMed AirSense 11 user guide for the Americas lists a “65W power supply unit” with a “DC output 24 V 2.71A”, a “Typical power consumption 56.1W (111.5VA)” and a “Peak power consumption 73.2W (137.6VA)”.

The older AirSense 10 user guide lists a “90W power supply unit” with a “DC output: 24V 3.75A”, a “Typical power consumption: 53W (57VA)” and a “Peak power consumption: 104W (108VA)”. Note the peak: the AirSense 10 can spike to 104 W where the AirSense 11 tops out at 73.2 W, even though their typical figures are within three watts of each other.

And the ResMed AirMini, which is the travel machine with no water tub and no heated tube, lists a “DC output: 24V 0.83A”, a “Typical power consumption: 6.3W” and a “Peak power consumption: 27W”, plus a separate line for “AirMini power Standby power consumption: 1 W”.

Hold those three sets of numbers in your head, because the gap between them is the whole story of this article.

The Runtime Table

Method, stated once so you can check every row. Usable watt hours equals nameplate watt hours multiplied by 0.85, which assumes 85 percent inverter efficiency. I use 85 percent rather than anything more flattering because Bluetti’s own AC180 runtime table implies only 78 to 81 percent of nameplate actually reaches the load across four appliance rows, so 85 percent is already the generous end. Runtime in hours equals usable watt hours divided by the draw in watts. Nights assumes eight hours of use per night. Nameplate capacities come from each manufacturer’s own product page.

Unit	Nameplate Wh	Usable Wh at 85 percent	Hours at 56.1 W typical	Nights at eight hours	Hours at 73.2 W peak
Goal Zero Yeti 500	499.2	424	7.6	Under one	5.8
Bluetti AC70	768	653	11.6	1.5	8.9
EcoFlow DELTA 3	1,024	870	15.5	1.9	11.9
Anker SOLIX C1000	1,056	898	16.0	2.0	12.3
Jackery Explorer 1000 v2	1,070	910	16.2	2.0	12.4
Bluetti AC180	1,152	979	17.5	2.2	13.4
Renogy PowerStation 2000	2,048	1,741	31.0	3.9	23.8
Bluetti AC200L	2,048	1,741	31.0	3.9	23.8
Bluetti Apex 300	2,764.8	2,350	41.9	5.2	32.1

The draw figures in columns four and six are ResMed’s published typical and peak consumption for the AirSense 11 in its Americas user guide. If you run a different machine, swap the number and redo the division. That is the entire method and it takes ten seconds.

Two things to notice. First, the popular 1 kWh class units all land in the same place, at roughly two nights. There is no meaningful CPAP difference between a Bluetti AC180, an EcoFlow DELTA 3, an Anker SOLIX C1000 and a Jackery Explorer 1000 v2. You should choose between them on weight, warranty and price, not on nights. Second, the difference between typical and peak is about 23 percent of your runtime, and a machine at a higher pressure setting sits closer to peak. If your margin matters, size against the peak column.

Why the Humidifier and the Heated Hose Destroy Your Runtime

This is the part that changes the arithmetic more than any battery choice, and ResMed gives you the evidence in its own documents.

The AirSense 11 ships with a HumidAir 11 tub and ClimateLineAir 11 heated tubing. Its published typical consumption is 56.1 W. The AirMini ships with no water tub and no heated hose, using a waterless heat moisture exchanger instead. Its published typical consumption is 6.3 W.

That is a factor of about nine, from the same manufacturer, in the same product family, on numbers printed in the same style in each user guide. These are not identical blowers and it is not a controlled experiment, so do not read it as a precise measurement of what the humidifier costs. But the mechanism is not mysterious. The humidifier heats water on a stainless steel hot plate and the heated hose keeps the air warm along its length. Both are resistive heating elements, and resistive heating is the most electrically expensive thing you can do.

Run the AirMini figure through the same runtime method and the picture flips completely. A Bluetti AC180 at 979 usable watt hours divided by 6.3 W is 155 hours, which is nineteen nights at eight hours. A Goal Zero Yeti 500 at 424 usable watt hours gives 67 hours, which is over eight nights. A device that could not get you through one night with heated humidification runs for over a week without it.

ResMed does not publish a breakdown of how much of the 56.1 W is humidifier and how much is blower, so I am not going to give you one. Not published. What I can tell you is the shape of the trade and the fact that ResMed’s own AirSense 11 guide says the tub holds 380 mL and gives “Time between each refill of the humidifier tub: > 8 hours ±0.5 hours”. You are boiling off most of a cup of water every night, and the energy to do that has to come from somewhere.

Talk to your equipment supplier about whether reducing or disabling humidification is appropriate for you before an outage, and about whether a waterless heat moisture exchanger is an option with your machine. That is a clinical question, not an electrical one, and I am not the person to answer it.

DC Operation Beats AC Operation, and Here Is Roughly How Much

Every watt hour that leaves the battery through the AC inverter pays a conversion toll of roughly 10 to 15 percent. That is why every figure in the table above uses 85 percent. If you can bypass the inverter, you stop paying that toll.

ResMed lists an “Air11 DC/DC converter” as an available accessory for the AirSense 11, and an “Air10 DC/DC converter” for the AirSense 10. Those let the machine run from a 12 volt supply, which every power station in this article provides. The AC180 lists “12V DC Outlets: 1 x12V/10A (Car outlet, regulated.)” and the AC200L adds a heavier “D40 (12V/30A, 400W max.)” outlet.

How much does that save? The DC path is not free either, since a converter has its own losses, and no manufacturer publishes an end to end efficiency for the DC port on these units. So here is the arithmetic with the assumption stated plainly. If the DC path runs at 95 percent, which is an assumption on my part and not a manufacturer figure, an AC180 gives 1,152 multiplied by 0.95, which is 1,094 usable watt hours, and 1,094 divided by 56.1 W is 19.5 hours instead of 17.5. That is about 12 percent more runtime, or roughly two extra hours.

Two extra hours is not nothing when you are trying to stretch two nights into three. It is also not the game changer some articles claim. Put the two decisions side by side: dropping heated humidification multiplies your runtime by about nine, and moving to DC adds twelve percent. Do the big one first.

The other reason to prefer the DC path is that regulated is the word that matters. Bluetti specifies its 12 volt outputs as regulated on both the AC180 and the AC200L, which means the voltage holds as the pack drains. An unregulated output sags, and a sagging supply is exactly the sort of thing you do not want feeding a device you sleep attached to.

A Battery That Covers the Whole Outage

1,152 Wh in the Bluetti AC180 is 979 usable watt hours at 85 percent, which is 17.5 hours at ResMed’s published 56.1 W typical, or 13.4 hours at its 73.2 W peak. Bluetti rates the pack at 3,500 cycles to 80 percent original capacity and recharges it from empty to 80 percent in 45 minutes.

Compare Bluetti Models →

Altitude

If you camp high or you are moving somewhere at elevation, altitude is a specification you should check rather than assume.

ResMed publishes an operating altitude for the AirSense 11 of “Sea level to 9,870′ (3,010 m); air pressure range 1060 hPa to 700 hPa”. For the AirSense 10 it publishes “Sea level to 8,500′ (2,591 m); air pressure range 1013 hPa to 738 hPa”, and for the AirMini the same “Sea level to 8,500′ (2,591 m)”. So the newer machine is rated for roughly 1,370 feet more elevation than the older one.

On the question of whether you need to change a setting when you go up, the AirSense 11 user guide I read describes no user adjustable altitude control anywhere in its menus or its specifications, and I am not going to claim a compensation behaviour that the document does not state. Not published. Some older machines from various manufacturers did require a manual altitude setting. Ask your equipment supplier what applies to your specific device before you travel, because getting this wrong changes delivered pressure and that is a therapy question rather than a power question.

What altitude does not change is the electrical arithmetic. Watts are watts at 10,000 feet.

The Machine That Will Not Run on Modified Sine Wave

This is a real problem and it is almost always misdiagnosed as a power station problem when it is not one.

Cheap inverters and most consumer uninterruptible power supplies output a stepped approximation of a sine wave rather than the real thing. CyberPower is honest about it on the spec sheet for its CP1500AVRLCD3, listing “Waveform: Simulated Sine Wave” alongside 1,500 VA, 900 W, a 4 millisecond typical transfer time and 219.95 dollars MSRP. Devices with switching supplies and heating elements often behave oddly on that waveform, and some refuse outright.

Every portable power station in this article outputs a true sine wave and says so on its own product page. Bluetti lists “Inverter Type: Pure Sine Wave” for both the AC180 and the AC70. Anker lists “AC Continuous Output: 1800W Pure Sine Wave” for the SOLIX C1000. Goal Zero lists “AC (Inverter)(pure sine wave): 500 W Continuous, 1000 W Surge” for the Yeti 500.

So if your machine will not run on your existing backup, the answer is usually not a bigger battery. It is that you are feeding it a simulated waveform from a UPS or a car inverter. Moving to a pure sine wave source fixes that class of problem, and every unit in the runtime table qualifies. Verify with your supplier that the specific combination is acceptable for your device rather than taking my word or a product page’s word for it.

Two Specifications Nobody Checks and Both Matter

Switchover Time

If you want the machine to ride through a grid failure without stopping, the power station has to be in line and has to hand over faster than the device notices. EcoFlow publishes “UPS <10ms” for the DELTA 3. Bluetti advertises “Seamless UPS in 20ms” for the AC70, and for the Apex 300 it claims “Fast 0ms or 20ms switching keeps sensitive devices like CPAP machines running smoothly.”

That Bluetti sentence names CPAP machines specifically and you should read it as marketing rather than as any form of medical clearance, because that is what it is. Bluetti does not publish a UPS switchover figure at all on the AC180 product page, and the Anker SOLIX C1000 tech specs list a “UPS Switch Time:” row with nothing after it. Not published, in both cases.

Idle Consumption, the Silent Killer

A power station is not free to leave switched on. Its inverter, screen and control board draw current whether or not anything is plugged in, and on a small overnight load that overhead is enormous in relative terms.

Bluetti quotes the Apex 300 as having “five-stage efficiency tech cut idle loss to just 20W”, and presents 20 W as a competitive achievement. Against a CPAP drawing 56.1 W, a 20 W idle overhead is 36 percent on top of your actual load. Every hour of runtime in my table above assumes the machine’s draw only, so if your unit idles at 20 W the real figure is closer to three quarters of what I calculated.

None of the other manufacturers in this article publish an idle consumption figure on the product pages I pulled. Not published. This is the single most useful question to ask a brand before you buy for medical backup, and it is the one nobody asks.

What This Looks Like as a Store

Medical adjacent power backup is a serious category with serious buyers, and it demands more care than a general power station store because the customer’s downside is not inconvenience. If you are looking at it as a business, start with the model in what high ticket dropshipping actually is. Then see where power and medical adjacent equipment sit inside the high ticket niches list.

Supplier approval is where most people stall, and it is a sequence rather than an email. That sequence is laid out in the complete supplier sourcing guide. Every serious brand will want a registered entity before they discuss terms, which is exactly what business formation for high ticket dropshipping deals with.

I build these stores on Shopify because a category that lives or dies on specification tables needs an app ecosystem that handles them well. I form the entities through Bizee, which is cheap enough that there is no excuse for delay.

I carry product liability cover through Hiscox, and in a medical adjacent category that is not a nice to have. I run the accounts through QuickBooks, because clean books are what make supplier credit conversations short.

Frequently Asked Questions

How many nights of CPAP will a 1,000 Wh power station give me?

Roughly two, at eight hours a night, with the humidifier running. Take a Bluetti AC180 at 1,152 Wh nameplate, multiply by 0.85 for 85 percent inverter efficiency to get 979 usable watt hours, then divide by ResMed’s published typical 56.1 W for the AirSense 11. That is 17.5 hours, which is 2.2 nights. At ResMed’s published peak of 73.2 W it drops to 13.4 hours, or 1.7 nights. Confirm your own machine’s figures in its user guide rather than assuming mine apply.

Does turning off the humidifier really make that much difference?

The evidence points strongly that way, using ResMed’s own numbers. The AirSense 11 with its heated tub and heated hose is published at 56.1 W typical. The AirMini, which uses a waterless heat moisture exchanger instead, is published at 6.3 W typical. On a Bluetti AC180 that is the difference between 17.5 hours and 155 hours of running time. Whether reducing humidification is appropriate for you is a question for your clinician or equipment supplier, not for an article.

Is running the CPAP on 12 volt DC actually better?

Yes, modestly. Running on DC through the manufacturer’s own DC converter bypasses the inverter and the 10 to 15 percent conversion loss that goes with it. Assuming a 95 percent DC path, which is my assumption rather than a published figure, an AC180 would go from 17.5 hours to about 19.5 hours on the same machine, which is roughly 12 percent more. Useful, but far less significant than the humidifier decision.

Do I need a pure sine wave inverter?

If your machine refuses to run on an existing backup, waveform is the most likely reason. Consumer uninterruptible power supplies frequently output a simulated sine wave, as CyberPower states plainly for its CP1500AVRLCD3. Every power station in this article publishes a pure sine wave output, so switching to one of those removes that variable. Verify the specific setup with your equipment supplier before relying on it.

Can I take a power station on a plane with my CPAP?

Not as carry on or checked baggage in any practical sense. Airline lithium rules cap what you may carry far below the capacity of any unit in this article. ResMed does confirm in the AirSense 11 guide that the machine itself “meets the Federal Aviation Administration (FAA) requirements (RTCA/DO-160, section 21, category M; RTCA-DO-160, section 20, category T) for all phases of air travel”, and its 65 W supply lists an aircraft input rating of 115 V at 400 Hz. Ask your airline about approved CPAP batteries specifically, since those are a different product class.

Which unit should I actually buy for outage backup?

If you want to cover a single overnight outage with margin, a 1 kWh class unit does it and they are all roughly equivalent for this load. If you want to cover a multi day outage, step up to a 2 kWh class unit such as the Bluetti AC200L at 847 dollars on promotion against an 899 dollar list price, which gives 31.0 hours at ResMed’s typical figure, or just under four nights. Whichever you choose, ask the brand for its idle consumption figure before you buy, because that overhead is what will actually eat your margin.

The Bottom Line

The order of operations for CPAP backup is not what most articles imply. First, decide what you are doing about humidification, because ResMed’s own numbers put a factor of roughly nine between a heated humidified machine and a waterless one, and that decision is worth more than every other choice on this page combined. That is a conversation with your equipment supplier or clinician, not a shopping decision.

Second, size the battery against your machine’s peak figure rather than its typical figure, because pressure settings and leak conditions push you toward peak and you do not want to discover that at four in the morning.

Third, ask about idle consumption. Bluetti presents 20 W of idle loss on the Apex 300 as a competitive achievement, which tells you what the rest of the field looks like. Against a 56.1 W load on an AC200L, that overhead is the difference between 3.9 nights and 2.9 nights.

And fourth, buy pure sine wave, prefer a regulated 12 volt output with the manufacturer’s own DC converter, and check the switchover time if you want the machine to ride through the transition rather than restart.

None of this saves you money on electricity, and it is worth being precise about by how much it does not. Amortise a 499 dollar AC180 over its rated 3,500 cycles to 80 percent original capacity at 85 percent efficiency and the hardware costs 14.6 cents per delivered kilowatt hour. Add the electricity you push into it, which is the 17.30 cents the average US household paid for grid power across 2025 in the EIA Electric Power Monthly, divided by that same 0.85 for another 20.4 cents. All in you are paying 35.0 cents per kilowatt hour, about 2.0 times what the wall socket charges. You are not buying cheap energy. You are buying the certainty that the machine keeps running when the grid does not, and for this particular load that is a very reasonable thing to buy.

Keep the Machine Running Through the Outage

The Bluetti AC200L holds 2,048 Wh, or 1,741 usable watt hours at 85 percent, which is 31.0 hours at ResMed’s published typical draw and 23.8 hours at its published peak. Pure sine wave output, a regulated 12 volt outlet and a 5 year warranty, for 847 dollars.

Check Bluetti Capacities →

If working through that made you notice how badly this category is served by content that does not show its arithmetic, that gap is also a business. Building a store that answers technical questions honestly is a slow way to start and a durable way to finish. If you would rather have it built, sourced and launched for you, look at the done for you high ticket dropshipping build and launch service.

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Trevor Fenner

Trevor Fenner is an ecommerce entrepreneur and the founder of Ecommerce Paradise, a platform focused on helping entrepreneurs build and scale profitable high-ticket ecommerce and dropshipping businesses. With over a decade of hands-on experience, Trevor specializes in high-ticket dropshipping strategy, niche and product selection, supplier recruiting and onboarding, Google & Bing Shopping ads, ecommerce SEO, and systems-driven automation and scaling. Through Ecommerce Paradise, he provides free education via in-depth guides like How to Start High-Ticket Dropshipping, advanced training through the High-Ticket Dropshipping Masterclass, and fully done-for-you turnkey ecommerce services for entrepreneurs who want a faster, more hands-off path to growth. Trevor is known for emphasizing sustainable, real-world ecommerce models over hype-driven tactics, helping store owners build scalable, sellable, and location-independent brands.