The Best Power Stations for a CPAP (2026) — Nights I Slept On Them, and the Arithmetic

The figure that matters is not the machine's peak rating but its average overnight draw, and it changes enormously with one setting.

My own machine is at the light end. Two nights on the Anker SOLIX C1000 Gen 2 took its display from full to 58% — roughly 370 watt-hours of its 884 Wh measured usable, or about 185 Wh a night. That's an average of around 23 W over eight hours. Yours may well draw more, which is why the table below gives calculated nights at the typical 35 W and 70 W figures alongside what I actually saw.

The humidifier is a heating element. Turning it on roughly doubles consumption and can more than halve your nights per charge.

Usable capacity is my own measurement: each unit drained from full to shutdown on a constant 300 W load, metered at the AC outlet.

Calculated nights assume eight hours at 35 W or 70 W — assumptions here. A dash means I rated the unit for CPAP use but didn't log a night count. Noise at about 500 W is far above a CPAP's draw, so treat it as a ceiling on how loud each fan gets, not what you'll hear at 23 W.

I used the Elite 100 V2 for 37 days, including three nights running my CPAP in the bedroom, and I never noticed it. That is the single most important thing about a CPAP battery after capacity, and it's why I rated noise 5 out of 5 — the only unit of the eleven to get full marks.

On my meter it delivered 892 Wh — 87.1% of its rating. It switched to battery in 10 ms, so with the CPAP plugged into it and it plugged into the wall, an outage passes without interruption. The screen is big and bright enough to read at a glance in the dark.

The catches: a 72-minute wall recharge, slower than the Anker and EcoFlow, and at $899 list it is expensive per watt-hour. If capacity is the only thing that matters to you, the Anker below delivers the same nights for much less.

It ran my CPAP for four nights, and 1,702 measured watt-hours works out at about six nights at 35 W or three at 70 W with the humidifier running. If you live somewhere outages run for days, or the therapy isn't optional, this is the capacity that turns a worry into a non-event.

It was quiet in normal use and I could lift it alone at 39.5 lb. Its 400 W solar ceiling and 70% cycle rating are weaknesses in general use, but for a unit that sits charged waiting for an emergency, neither matters much.[2] UPS switchover measured 20 ms.

Two nights left it at 58%, so three nights dry is comfortably within reach — the same capacity as the Bluetti for $400 less at list. It refilled in 52 minutes, so a brief return of mains power tops it up completely, and its 10 ms switchover kept my desktop PC running.

It is quiet below 500 W, which covers a CPAP. Just don't fast charge it beside the bed — the fans roar at around 1,600 W of input.

Turn the humidifier off on battery. It is the single biggest lever you have — it roughly doubles your nights.

Use the DC output if your machine supports it. Many CPAPs accept 12 V directly. Skipping the inverter avoids the AC conversion loss and the inverter's idle draw, which I measured at between 7 W and 38 W across these units — at the top end, that's more than the CPAP itself. You'll need the correct DC cable from your machine's manufacturer; don't improvise one.

Keep it charged. A power station sitting at 40% is not a backup. If it's there for medical use, top it up monthly.

Check your own machine's draw. My 23 W average is lighter than typical. Your machine's label or manual gives its rating, and pressure settings move it.

Use UPS mode. I measured switchover times from 10 ms to 30 ms. Leaving the machine permanently plugged into the power station, with the power station plugged into the wall, means an outage causes no interruption at all.

For a CPAP, my pick is the Bluetti Elite 100 V2: three nights from one charge, a 10 ms switchover, and a fan I never heard. That pick is my opinion; the measurements beside it aren't.

If you need the humidifier every night, or outages where you live run for days, step up to the Jackery Explorer 2000 v2 and its four nights.

If capacity matters more than silence, the Anker SOLIX C1000 Gen 2 does the same nights for $400 less — just don't fast charge it beside the bed.

And don't rely on the Anker SOLIX C300 for this unless you know your machine draws very little.