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Power station guides 17 articles
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A portable power station is one of the easiest ways to keep a CPAP running during a power outage or a camping trip. Most CPAP machines use little power — the heated humidifier is what drains batteries. Here’s how to work out how many nights you’ll get, and which units we’d consider.
This page is general product information, not medical advice. Check your CPAP’s manual and talk to your equipment supplier or doctor about backup power for your specific device.
Quick picks for CPAP
- Short outages, light and quiet: EcoFlow RIVER 3 — 245Wh, 7.8 lb, under 30dB, UPS switchover under 20ms.
- Budget option: Jackery Explorer 300 Plus — 288Wh, 8.27 lb.
- Several nights or with the humidifier on: Anker SOLIX C1000 Gen 2 — 1,024Wh, 10ms UPS.
How much power does a CPAP use?
- Without humidifier: typically 30–60W, depending on pressure setting.
- With heated humidifier and heated tube: often 70–100W or more.
Your exact number is on the power supply brick or in the manual. Lower pressure settings use less power.
How many nights will it last?
Using runtime ≈ capacity × 0.85 ÷ watts, for an 8-hour night:
| Capacity | CPAP at 40W (no humidifier) | CPAP at 80W (humidifier on) |
|---|---|---|
| 245Wh (RIVER 3) | About 5 hours | About 2.5 hours |
| 288Wh (Explorer 300 Plus) | About 6 hours | About 3 hours |
| 1,024Wh (C1000 Gen 2, DELTA 3 Plus) | About 22 hours (2–3 nights) | About 11 hours (1+ night) |
| 2,042Wh (Explorer 2000 v2) | About 43 hours (5 nights) | About 22 hours (2–3 nights) |
If a small unit doesn’t quite cover a full night, the fix is usually to turn off the humidifier or use DC power (below), not to buy a much bigger station.
Use DC power to get more nights
Running a CPAP through the AC outlet means the power station converts DC to AC, then the CPAP’s power brick converts it back to DC — wasting energy twice. Most CPAP makers sell a DC power cord or converter that plugs straight into the power station’s 12V car port. Many users report substantially longer runtime this way. Check your CPAP maker for the correct cable for your model.
Our CPAP picks
EcoFlow RIVER 3 — Best small CPAP backup
245Wh · 300W · 7.8 lb · under 30dB · under-20ms UPS · 5-year warranty. Plug it into the wall, plug your CPAP into it, and it takes over automatically if the power goes out at night. On AC power without the humidifier, expect about 5 hours; for a full night, use a DC cord or step up to a larger unit.
Jackery Explorer 300 Plus — Budget pick
288Wh · 300W · 8.27 lb. A bit more capacity than the RIVER 3, often for less money. Only one AC outlet, so use the 12V port with a DC cord if you can.
Anker SOLIX C1000 Gen 2 — Best for multi-night outages
1,024Wh · 2,000W · 10ms UPS · 24.9 lb. Two to three nights without the humidifier, with power left over for phones, a lamp, and a router.
Tips for CPAP users
- Keep the station plugged in so it’s always full when you need it.
- Test a full night at home before you rely on it on a trip.
- Bring a solar panel on longer camping trips: 100W of sun during the day can refill a small unit for the next night.
- Cold weather reduces battery output. Keep the station inside the tent, not on the ground outside.
Common questions
What size power station do I need for a CPAP?
Multiply your CPAP’s watts by the hours you sleep, then divide by 0.85. A 40W machine for 8 hours needs about 380Wh per night; with a heated humidifier at 80W, about 750Wh. For two nights with the humidifier, a 1kWh-class unit is the comfortable choice.
Can I use the heated tube and humidifier?
Yes, but they can double or triple power use. On battery, many users turn the humidifier down or off, or use a heat-and-moisture exchanger (HME) instead. Ask your equipment supplier what’s appropriate for you.
Can I take a power station on a plane for my CPAP?
Almost never. FAA rules forbid spare lithium batteries over 160Wh on passenger aircraft, and power stations are larger than that. For flights, look at the dedicated CPAP batteries your CPAP maker approves for air travel.
Will the CPAP turn off when the power goes out?
Not if it’s plugged into a power station with UPS mode and the station is plugged into the wall. The switchover takes milliseconds — fast enough that most CPAPs keep running without restarting.
How do I find my CPAP’s wattage?
Look at the label on the power supply brick: it lists output volts and amps. Multiply them (for example, 24V × 3.75A = 90W maximum). The real draw is usually well below the maximum, especially with the humidifier off.
Compare the picks
- Anker C1000 Gen 2 vs. EcoFlow DELTA 3 Plus
- EcoFlow vs. Jackery (including RIVER 3 vs. Explorer 300 Plus)