Best power station for a CPAP in 2026

How much battery does a CPAP need per night?

Start with your settings. With the humidifier and heated tube on, an AirSense 10 uses about 34 W, so an 8-hour night is about 272 Wh. Add about 15% for inverter loss and you need roughly 320 Wh of battery per night. With the humidifier on but the heated tube off, it uses about 22 W. With the humidifier off, it is about 7 W.

Here is a worked example. Say you want to cover a two-night outage with the humidifier and heated tube on. That is two nights of 272 Wh, or 544 Wh at the machine, and about 640 Wh of battery once you allow for losses. A 286 Wh unit falls short. A 1,024 Wh unit covers it with room left for phones and a lamp, and a 2,048 Wh unit gets you through about six nights.

Your own machine may use more or less. Higher pressure settings and bilevel machines draw a little more, and a cold bedroom makes the humidifier work harder. If your supplier can give you a measured number for your model, use that. The 53 W typical and 104 W peak printed for the AirSense 10 are power supply ratings, not what it draws all night.

What features matter in a power station for a CPAP?

UPS switch-over comes first. Most CPAP users want the machine to keep running if the power cuts out while they sleep. Every pick here lists a 10 ms switch-over, so the station takes over almost at once when wall power drops. Leave the station plugged into the wall with the CPAP plugged into the station. Try it once while you are awake: pull the station's wall plug and make sure the CPAP keeps running.

Next is a 12V option. Many CPAP makers sell a 12V DC cord or converter for their machines. Plugged into the station's car-style socket, it skips the inverter, which wastes roughly 10% to 15% of the battery as heat. Get the cord your CPAP maker approves for your model, not a generic adapter. All five picks have a car-style socket.

Battery type and weight matter too. Every pick uses LiFePO4 cells rated for 3,000 to 4,000 cycles, which is many years of nightly use, and this chemistry handles heat better than older NMC packs. Weight matters if the station lives in a closet and comes out for each storm. A 25 lb unit is easy for most people to move. A 40 lb unit is not.

If your outages last days, look at solar input and expandability. The RIVER 3 Plus grows to 858 Wh, the DELTA 3 Plus to 5,000 Wh and the C2000 Gen 2 to 4,096 Wh. The DELTA 3 Plus and the Elite 100 V2 take the most solar of the five, up to 1,000 W each.

Mistakes to avoid

Buying for the power brick, not the machine. People see 104 W on the CPAP power supply and buy a huge station. With every heater on, the machine uses about a third of that.

Forgetting about the humidifier. The heated tube and humidifier use most of the energy. A 286 Wh station that lasts four nights with the humidifier off will not finish one night with the heated tube on.

Storing it empty. A station that sat at 20% in a closet will not help at 2 a.m. Keep it topped up, or better, keep it plugged in and use it as a UPS every night. Also skip power strips and long, thin extension cords. Plug the CPAP straight into the station.

Safety

A power station should never be the only backup for a CPAP or any equipment you rely on to breathe. If missing a night of therapy is dangerous for you, talk to your doctor and equipment supplier about a plan, and register with your utility's medical-needs program so they know you depend on power.

Keep the station on a hard, dry surface with space around it for airflow, not under bedding or against a heater. Refill the humidifier tank away from the station so water does not drip on it. Do not cover the vents, and do not charge it inside a closed cabinet.

Battery stations burn no fuel, so they are safe to use in a bedroom. A gas generator is not. Never run one inside, in a garage or near an open window.

How can you get more nights from one charge?

Turn off the heated tube first. On an AirSense 10 that drops use from about 34 W to about 22 W, which turns three nights on a 1,024 Wh station into about five.

If it is comfortable for you, turn the humidifier off during an outage. That cuts use to about 7 W, and a 1,024 Wh station then lasts about 15 nights. Ask your supplier first if you rely on humidity to avoid a dry nose or mouth.

Use your maker's 12V cord if there is one, charge phones from USB ports, and switch off the AC outlets when nothing needs them, since an idle inverter still uses some power. Recharge the station any time the power comes back, even for an hour, so each night starts as full as possible.