How long will a power station run a CPAP?

Updated Oct 11, 2026

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A CPAP is one of the easier devices to run from a power station, but small stations are smaller than they look. Without the humidifier most machines draw about 30–60 W. With it, about 80–100 W. A compact 250–300 Wh station gives roughly 5–6 hours without the humidifier, which is less than one full night. For two nights without the humidifier you need roughly 750 Wh or more, and about twice that with it.

General information, not medical advice. Power stations are not certified medical backup devices. For life-sustaining equipment such as oxygen concentrators, keep a backup plan, ask your equipment supplier, and register with your utility’s medical-priority program.

Find your machine’s real draw

The number on your CPAP’s power brick is a maximum, not typical use. Real draw depends on your pressure setting, mask leak and humidity. We use 40 W without the humidifier and 90 W with it, which is typical for modern machines. For a precise number, plug the machine into a watt meter for one night and divide the watt-hours by the hours slept.

Runtime without humidifier (40 W)

CPAP (no humidifier): 40 W running. Current models; “Borderline” means within 10% of the station’s rating.
Power station	Capacity	Runtime
EcoFlow DELTA Pro	3,600 Wh	3.2 days
BLUETTI Elite 200 V2	2,074 Wh	44.1 h
EcoFlow DELTA 2 Max	2,048 Wh	43.5 h
EcoFlow DELTA 3 Max	2,048 Wh	43.5 h
Jackery Explorer 2000 Plus	2,042 Wh	43.4 h
Anker SOLIX S2000	2,010 Wh	42.7 h
BLUETTI AC180	1,152 Wh	24.5 h
Jackery Explorer 1000 v2	1,070 Wh	22.7 h
Anker SOLIX C1000	1,056 Wh	22.4 h
EcoFlow DELTA 3 Plus	1,024 Wh	21.8 h
Anker SOLIX C1000 Gen 2	1,024 Wh	21.8 h
Jackery Explorer 300	293 Wh	6.2 h
EcoFlow RIVER 3 Plus	286 Wh	6.1 h

Runtime with humidifier (90 W)

CPAP with humidifier: 90 W running. Current models; “Borderline” means within 10% of the station’s rating.
Power station	Capacity	Runtime
EcoFlow DELTA Pro	3,600 Wh	34.0 h
BLUETTI Elite 200 V2	2,074 Wh	19.6 h
EcoFlow DELTA 2 Max	2,048 Wh	19.3 h
EcoFlow DELTA 3 Max	2,048 Wh	19.3 h
Jackery Explorer 2000 Plus	2,042 Wh	19.3 h
Anker SOLIX S2000	2,010 Wh	19.0 h
BLUETTI AC180	1,152 Wh	10.9 h
Jackery Explorer 1000 v2	1,070 Wh	10.1 h
Anker SOLIX C1000	1,056 Wh	10.0 h
EcoFlow DELTA 3 Plus	1,024 Wh	9.7 h
Anker SOLIX C1000 Gen 2	1,024 Wh	9.7 h
Jackery Explorer 300	293 Wh	2.8 h
EcoFlow RIVER 3 Plus	286 Wh	2.7 h

Divide these hours by 8 to get nights of sleep.

Run it from DC to go further

Every power station loses some energy converting battery power to AC. Many CPAP makers sell a 12 V DC adapter that plugs into the station’s car socket and skips that conversion, which typically adds 10–20% more runtime. Check that the adapter is approved for your model, and turn off the heated tube and humidifier when you need the most nights.

UPS mode at home

Some stations can sit between the wall and your machine and switch to battery automatically during an outage. The EcoFlow RIVER 3 Plus and DELTA 3 Plus and the Anker SOLIX C1000 Gen 2 list a switchover of about 10 ms. That is designed to keep most machines running, but test it with your own machine before you rely on it.