01Best value4.5/10
Bluetti
Elite 100 mini
1,004Wh · 700W · 23.6 lb
A full 1,004Wh in a 23.6 lb box. It covers multiple nights without a humidifier and fits on a nightstand.
$429–$549 street
Buying guide · 5 picks
The Best Portable Power Stations for CPAP Backup in 2026
The humidifier is the variable that decides your runtime. Here is how to size a station for a full night, plus a plan for longer outages.
A CPAP is a small load compared with a fridge or a space heater, which makes it a good match for a compact power station. The complication is the heated humidifier, which can double or triple the draw depending on the setting.
We ranked these stations on overnight runtime with and without a humidifier, DC adapter compatibility, recharge speed, and UPS behavior. This is general product guidance, not medical advice. If you depend on a CPAP or another medical device, talk to your clinician and have a backup plan that does not rely on a single battery.
Top picks
The short list
Ranked for this job, not for affiliate payout. Prices are street bands checked in November 2026.
02Best for humidifier users4.5/10
Anker SOLIX
C1000 Gen 2
1,024Wh · 2,000W · 24.9 lb
2,000W output, a 49-minute recharge, and 1,024Wh. The fast recharge matters if you need to top up during the day.
$699 street
03Best solar and expansion4.6/10
EcoFlow
DELTA 3 Plus
1,024Wh · 1,800W · 27.6 lb
1,000W solar input and a 2kWh expansion path make it the most flexible long-outage option at 1kWh.
$699–$899 street
04Longest runtime5.7/10
Bluetti
Elite 200 V2
2,073.6Wh · 2,600W · 53.4 lb
2,073Wh gives roughly two nights with a humidifier or four-plus nights without. The best choice for multi-day outages.
$899 street
05Best travel3.1/10
EcoFlow
RIVER 3 Plus
286Wh · 600W · 10.4 lb
10.4 lb and expandable to 858Wh. Easy to pack for travel, but the base capacity is only good for one night without a humidifier.
$249–$329 street
| Station | Capacity | Output | Weight | Solar | Street price |
|---|---|---|---|---|---|
| Bluetti Elite 100 miniBest value | 1,004 Wh | 700 W | 23.6 lb | 350 W | $429–$549 |
| Anker SOLIX C1000 Gen 2Best for humidifier users | 1,024 Wh | 2,000 W | 24.9 lb | 600 W | $699 |
| EcoFlow DELTA 3 PlusBest solar and expansion | 1,024 Wh | 1,800 W | 27.6 lb | 1,000 W | $699–$899 |
| Bluetti Elite 200 V2Longest runtime | 2,073.6 Wh | 2,600 W | 53.4 lb | 1,000 W | $899 |
| EcoFlow RIVER 3 PlusBest travel | 286 Wh | 600 W | 10.4 lb | 220 W | $249–$329 |
Specs checked November 2026. Prices are street bands, not live quotes. How we score.
The humidifier is the whole ballgame
A CPAP without a humidifier typically draws 30-50W. With a heated humidifier on a medium setting, the average can climb to 70-100W or more. That difference doubles the battery you need for a full night.
If you can sleep without humidity, do the runtime math without it and buy a smaller station. If you need it, size for the higher draw and add margin for cold rooms and higher pressure settings.
Use a DC adapter when you can
Many CPAP manufacturers sell a 12V DC adapter for their machines. Running the CPAP directly from the station's DC output avoids the inverter's conversion loss and can improve runtime by 10-20%.
Check the adapter's voltage and connector for your specific model, and confirm the station's DC output can supply the required current. Do not improvise a connector; a bad connection can damage the machine.
Overnight runtime math
Using the 85% usable-energy rule, a 1,004Wh station gives about 853Wh. At 40W, that is roughly 21 hours, or about three 8-hour nights. At 90W with a humidifier, it is about 9.5 hours, or one night with a small margin.
A 2,073Wh station gives about 1,763Wh. At 40W, that is roughly 44 hours, or five nights. At 90W, it is about 19.5 hours, or two nights.
These are estimates. Your machine's pressure setting, humidifier level, heated tube, and room temperature all affect the real number. Test the setup for one night before relying on it.
UPS mode and seamless switching
Some stations switch to battery in under 10-20ms when grid power drops. That is fast enough for many CPAP machines to keep running without a restart, but not all. Check whether your machine tolerates a brief transfer.
A UPS feature is useful even if you do not need it for the CPAP: it keeps the router and phone charger alive during a brief outage and gives you time to find a flashlight.
Build a backup plan, not just a battery
A single station can fail, run out, or be left uncharged. Have a second power source: a smaller battery, a travel CPAP with its own battery, or a plan to move to a location with power.
Keep the station charged and test it monthly. Store the CPAP's DC adapter and a labeled cable with the station so you are not hunting for them at 2 a.m.
If you use oxygen or another life-sustaining device, a portable power station is not a substitute for a medical-grade backup system. Work with your provider on a plan that meets your needs.
What we would buy
For a single user without a humidifier, the Bluetti Elite 100 mini is the best value. It covers several nights and is easy to keep by the bed.
For humidifier use or two users, the Anker C1000 Gen 2 or Bluetti Elite 200 V2. The Elite 200 V2 gives you more nights; the C1000 recharges faster.
For travel, the EcoFlow RIVER 3 Plus. It is the only one here that packs like a laptop accessory, and the expansion battery can cover a longer trip.
FAQ
Questions buyers actually ask
How long will a 1kWh power station run a CPAP?
About 21 hours at 40W without a humidifier, or roughly 9-10 hours at 90W with one. Test your specific machine and settings before relying on the estimate.
Can I use a heated humidifier with a power station?
Yes, but it roughly doubles the draw. Size the battery for the humidifier setting you actually use, and consider turning it off if runtime is tight.
Do I need a pure sine wave inverter?
Most CPAP manufacturers recommend pure sine wave power. All stations in this guide use pure sine wave inverters, but check your machine's requirements.
Will a power station switch over fast enough to keep my CPAP running?
Many units switch in under 20ms, which is fast enough for most CPAPs. Check the specific station's UPS rating and test it with your machine.
Is a portable power station a medical device?
No. It is a consumer battery product. If you depend on a medical device, use a backup plan reviewed with your clinician and device provider.
Next step
Put a number on it.
Use the runtime calculator to see how the top picks handle your actual load, or print the outage checklist and build a plan.