HomeWhat size power station you need for a CPAP
ResMed lists the AirSense 11's typical power consumption as 56.1 W, so one 8-hour night on AC needs a station rated at 645 Wh or more. A 1,024 Wh station such as the Anker SOLIX C1000 Gen 2 runs it for 12 hours on AC, or 15 hours from its 12 V car socket with ResMed's DC converter.
Battery size you need, rated capacity
703Wh
Counts 82% of a battery's rated capacity as usable and adds the inverter's own draw while anything runs on AC: the formula in Jackery's runtime calculator. How the maths works
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It runs an AirSense 11 for 12 hours on AC or 15 hours from its 12 V car socket, and Anker rates its UPS switchover at 10 ms and its noise at 20 dB under 200 W.
Its 1,536 Wh is the smallest battery on this site that covers two 8-hour nights of an AirSense 11 on AC (2.12 nights), and Jackery rates its switchover at 10 ms.
Its 2,048 Wh gives 2.83 nights of an AirSense 11 on AC or 3.74 nights from its 12 V socket, and EcoFlow rates its UPS switchover at under 10 ms and its noise at 25 dB or less at 600 W.
At 10.4 lb it is the lightest of these picks, but on its own it runs an AirSense 11 for 4.2 hours from its 12 V socket (52% of an 8-hour night) or 3.5 hours on AC (44%). EcoFlow lists it as expandable to 858 Wh, more than the 645 Wh rated that one 8-hour night on AC needs.
ResMed prints two figures for each AirSense machine in its US user guide: a typical power consumption and a peak. The calculator uses the typical figure for runtimes and the peak to check that a station's AC output is high enough.
Both ResMed peaks are below the AC output of every station on this site, where the lowest is 300 W. What limits you is battery capacity: how many hours a station can supply about 56 W.
Here is one 8-hour night on an AirSense 11, worked through the site's calculator. It counts 82% of a station's rated capacity as usable. On AC it adds the inverter's own draw: 10 W on stations under 1,000 Wh, 15 W from 1,000 to 1,499 Wh and 18 W from 1,500 Wh (Jackery's calculator figures, applied to every brand).
No 300 Wh class station covers the night: they hold 44% to 46% of it on AC. Every 1 kWh class station covers it with some left over. The Anker SOLIX C1000 Gen 2 holds 1.48 nights on AC, or 1.36 days of the tool's list. Change the hours in the tool to match your own nights, and it lists the stations that fit, sorted by price per Wh.
One appliance at a time, from the makers' own figures, counting 82% of each battery as usable plus the inverter's own draw (method).
| Model | Capacity | AirSense 11, 56 W AC56 W | AirSense 11, 56 W on 12 V56 W, DC | AirSense 10, 53 W AC53 W |
|---|---|---|---|---|
| EcoFlow RIVER 3 Plus | 286 Wh | 3.5 hours | 4.2 hours | 3.7 hours |
| Anker SOLIX C300 | 288 Wh | 3.6 hours | 4.2 hours | 3.7 hours |
| BLUETTI Elite 30 V2 | 288 Wh | 3.6 hours | 4.2 hours | 3.7 hours |
| Jackery Explorer 300 | 293.8 Wh | 3.6 hours | 4.3 hours | 3.8 hours |
| BLUETTI Elite 100 mini | 1,004.8 Wh | 12 hours | 15 hours | 12 hours |
| EcoFlow DELTA 3 Classic | 1,024 Wh | 12 hours | No 12 V socket | 12 hours |
| EcoFlow DELTA 3 | 1,024 Wh | 12 hours | 15 hours | 12 hours |
| EcoFlow DELTA 3 Plus | 1,024 Wh | 12 hours | 15 hours | 12 hours |
| Anker SOLIX C1000 Gen 2 | 1,024 Wh | 12 hours | 15 hours | 12 hours |
| BLUETTI Elite 100 V2 | 1,024 Wh | 12 hours | 15 hours | 12 hours |
| DJI Power 1000 V2 | 1,024 Wh | 12 hours | No 12 V socket | 12 hours |
| FOSSiBOT F1800 | 1,024 Wh | 12 hours | 15 hours | 12 hours |
| Dabbsson DBS1000 Pro | 1,024 Wh | 12 hours | 15 hours | 12 hours |
| Jackery Explorer 1000 v2 | 1,070 Wh | 12 hours | 16 hours | 13 hours |
| BLUETTI AC180 | 1,152 Wh | 13 hours | 17 hours | 14 hours |
| Jackery Explorer 1500 v2 | 1,536 Wh | 17 hours | 22 hours | 18 hours |
| Jackery Explorer 2000 v2 | 2,042 Wh | 23 hours | 30 hours | 24 hours |
| EcoFlow DELTA 3 Max | 2,048 Wh | 23 hours | 30 hours | 24 hours |
| Anker SOLIX C2000 Gen 2 | 2,048 Wh | 23 hours | 30 hours | 24 hours |
| DJI Power 2000 | 2,048 Wh | 23 hours | No 12 V socket | 24 hours |
| FOSSiBOT F2400 | 2,048 Wh | 23 hours | 30 hours | 24 hours |
| BLUETTI Elite 200 V2 | 2,073.6 Wh | 23 hours | 30 hours | 24 hours |
| Dabbsson DBS2300 Plus | 2,330 Wh | 26 hours | 34 hours | 27 hours |
| Anker SOLIX F3800 Plus | 3,840 Wh | 42 hours | 2.3 days | 44 hours |
| EcoFlow DELTA Pro 3 | 4,096 Wh | 45 hours | 2.5 days | 47 hours |
These are 8-hour nights of an AirSense 11 at 56.1 W, from a full battery with no recharge. The first figure is on AC, the second from the 12 V socket.
Three nights in a row need 2,169 Wh rated on AC. The Dabbsson DBS2300 Plus (2,330 Wh) is the smallest station here that covers that, at 3.22 nights. On DC, three nights need 1,642 Wh rated, and the 2,042 Wh Jackery Explorer 2000 v2 covers them (3.73 nights). For an AirSense 10 at 53 W, a 1,024 Wh station gives 1.54 nights on AC.
ResMed makes the Air11 DC/DC Converter 90W (model 390002) for the AirSense 11. It runs the CPAP from a power station's 12 V car socket instead of its AC outlet. A 12 V load skips the inverter, so the calculator adds no inverter draw, and the same battery gives more hours:
ResMed's guide gives no separate figure for the draw through the converter, so the DC hours use the same 56.1 W typical figure. Check that your station has a 12 V car socket: the EcoFlow DELTA 3 Classic has none, and the DJI Power 1000 V2 and DJI Power 2000 need DJI's Power SDC to Car Charger Plug Power Cable. The tool and the table have no 12 V DC figure for the AirSense 10.
A station with UPS switchover can sit between the wall and your CPAP. Plug the station into a wall outlet and the CPAP into the station. If grid power cuts out, the station switches the CPAP to its battery, which then runs it for the hours in the table above. The makers rate how fast that switch happens:
This site has no ResMed figure for how long a gap in power a CPAP can run through. Ask ResMed or your equipment supplier whether a 10 ms or 20 ms switchover is short enough for your machine.
The station sits near your bed, so check its noise rating too. Anker rates the SOLIX C1000 Gen 2 at 20 dB under 200 W, and BLUETTI lists the Elite 100 mini at 50 dB max.
For a weekend away from hookups, count the nights and decide between AC and DC. Two 8-hour nights of an AirSense 11 need this much rated capacity:
If you carry the station from the car to the tent, check the weight. The 1 kWh class runs from 23.59 lb (BLUETTI Elite 100 mini) to 35.27 lb (BLUETTI AC180). The Jackery Explorer 1500 v2 weighs 31.97 lb and the EcoFlow DELTA 3 Max 44.8 lb.
Solar panels can recharge the battery during the day, up to each maker's rated solar input: 600 W for the Anker SOLIX C1000 Gen 2, 400 W for the Jackery Explorer 1500 v2 and 500 W for the EcoFlow DELTA 3 Max. For a cooler, lights and phones as well, see power stations for camping.
Ask your doctor or CPAP equipment supplier before you rely on a power station for your therapy, and before you change any humidifier or heated tube setting. ResMed's AirSense 10 user guide says: "If you are using an external battery, you should turn off the humidifier." Ask your supplier whether that applies to your machine and your prescription. ResMed's US guides give one typical figure for each machine with its humidifier and no figure without it, so every runtime on this page uses the figure with the humidifier attached.
If this page has no figure for your machine, such as the Philips DreamStation 2, ask the maker or your supplier for its typical power consumption in watts. The runtime method shows how to turn that figure into hours on any station: 82% of the rated Wh, divided by the machine's watts plus the inverter's draw on AC. To size a station for the fridge, router and lights as well, see power stations for home backup.
Yes. ResMed lists peak consumption of 73.2 W for the AirSense 11 and 104 W for the AirSense 10, below the lowest AC output on this site (300 W), and an AirSense 11 on AC runs 3.5 hours on the 286 Wh EcoFlow RIVER 3 Plus and 45 hours on the 4,096 Wh EcoFlow DELTA Pro 3. Check with your doctor or equipment supplier before you run your CPAP on battery power.
For one 8-hour night of a ResMed AirSense 11 at 56.1 W, you need a station rated at 645 Wh on AC or 547 Wh on 12 V DC. A 1,024 Wh station gives 1.48 nights on AC, and two nights on AC need 1,387 Wh rated, which the 1,536 Wh Jackery Explorer 1500 v2 covers.
The Jackery Explorer 300 (293.8 Wh) runs a ResMed AirSense 11 for 3.6 hours on AC, or 4.3 hours from its 12 V car port with ResMed's DC converter. That is 46% of an 8-hour night on AC. An AirSense 10 runs 3.8 hours on AC.
A power station with a 12 V car socket and ResMed's Air11 DC/DC Converter 90W gives an AirSense 11 more hours per charge than the AC outlet does, because a 12 V load skips the inverter. Two 8-hour nights on DC need 1,095 Wh rated, and the 1,152 Wh BLUETTI AC180 is the smallest station here that covers it.
Three 8-hour nights of an AirSense 11 need 1,642 Wh rated on 12 V DC, which the Jackery Explorer 2000 v2 (3.73 nights) and the 2,048 Wh stations such as the EcoFlow DELTA 3 Max (3.74 nights) cover. On AC they need 2,169 Wh rated, and the smallest station here that covers that is the 2,330 Wh Dabbsson DBS2300 Plus (3.22 nights).
It can if the CPAP is plugged into a power station that is plugged into the wall: when grid power cuts out, the station switches to its battery. The makers that publish a figure rate that switchover from under 8 ms (FOSSiBOT F2400) to 20 ms, and Anker rates the SOLIX C1000 Gen 2 at 10 ms. Ask ResMed or your supplier whether that gap is short enough for your machine.
Specifications are the makers' own published figures, read from these pages. Prices are fetched from the stores at build time and dated where they appear.