Best Portable Power Station for CPAP (2026)

A CPAP is the rare gadget where "the battery died overnight" isn't an annoyance — it's a night of untreated apnea. So this guide ranks portable power stations on the only thing that matters here: how many real hours they'll run your machine, with your settings, not the rosy number on the box. Short version — if you want one unit that covers a home outage, a long weekend and even two machines for a couple, get the Anker SOLIX C1000 (1,024Wh, pure sine wave, near-instant UPS). For travel and camping the C300X (288Wh) is the smallest sensible pick, and for RV life the C2000 Gen 2 with its 30-amp outlet is the one. We've kept it honest: Jackery's Explorer 300 Plus is the only unit here with a manufacturer-published CPAP runtime, and EcoFlow's DELTA 3 undercuts the C1000 on price and noise — both are in the table and the picks. But before any of that, read the next section. Four settings decide whether a power station gets you to morning, and most buyers learn them the hard way.

The four settings that decide if you make it to morning

You can buy the "right" power station and still wake up to a dead machine if you get these wrong. This is the part the spec sheets skip.

1. The heated humidifier is the runtime killer. A CPAP blower alone sips power — a ResMed AirSense 10 pulls about 7W with the humidifier off. Switch the humidifier on and it jumps to ~22W; add the heated tube and it's ~34W. That's a 3–5× swing on one machine, and it roughly halves (campers report up to 70–80% loss) how many nights a battery gives you. The fix most people land on: run the humidifier "dry" — water in the chamber, heater off — to keep some moisture without the power cost. We dig into the math in will 288Wh run a CPAP all night?

2. DC beats the AC outlet by 15–30%. Your CPAP actually runs on DC. Plug it into the power station's AC wall outlet and the unit converts DC→AC→DC, bleeding 15–30% as heat. Run it instead from a 12V DC car-style port with the right cable and you reclaim most of that — sometimes the difference between one night and two. The catch: ResMed's AirSense machines use a proprietary connector and usually need a ~$300 DC converter, so confirm a DC option exists for your model before counting on it.

3. "Eco mode" can shut your CPAP off at 3am. Between breaths a CPAP idles below ~10W, and many power stations read that as "nothing plugged in" and cut the AC outlet to save power. People discover this by waking up to a silent machine. Before you trust any unit overnight, disable its eco/auto-shutoff (on Jackery it's a long-press of AC + power; on EcoFlow it's an app toggle), or keep a small dummy load plugged in to hold the port awake.

4. Pure sine wave is non-negotiable. A CPAP motor — and especially the heated humidifier — wants clean, grid-like power. A cheap "modified sine wave" inverter can buzz, throw error codes, or damage the humidifier. Good news: every unit in this guide is pure sine wave, so you can stop worrying about it as long as you stick to these picks.

The best CPAP power stations, compared

*No manufacturer except Jackery publishes an official CPAP runtime, so every other figure here is an estimate from capacity and typical draw, before inverter losses. Treat them as planning numbers, test your own setup, and re-check prices — they move with sales. Now, the picks.

1. Anker SOLIX C1000 — best overall for home backup

For the most common reason people buy one of these — a backup that keeps the CPAP running when the grid drops — the C1000 is the easy call. Its UPS switchover is under 10 milliseconds, faster than a blink, so a blackout doesn't restart your machine or wake you. The 1,024Wh LiFePO4 battery runs a humidifier-off CPAP somewhere around 20 hours — two to three nights, or a single night with the humidifier on and a comfortable margin. A couple can run two machines off it. It's pure sine wave, it recharges flat-to-full in about an hour, and it's expandable if you later want multi-night coverage. LiFePO4 cells mean ~3,000 cycles, so nightly use won't wear it out for years.

The honest flaw: it's not silent. Under a light CPAP load it's quiet (~35 dB), but the fan ramps up hard during fast wall charging — loud enough that reviewers warn against recharging it next to the bed overnight. The workaround is built in: use the Anker app to throttle the charge rate, and charge it during the day. It's also heavier (~28 lb) than a comparable Jackery, and Anker's firmware update flow wants an account login. None of that undercuts the core job — for a stay-at-home medical backup that occasionally travels, it's the best balance of clean power, instant switchover and capacity here. If price and noise are your priority, read the EcoFlow DELTA 3 pick below; it's the C1000's closest rival.

2. Anker SOLIX C800 — best for a week of camping

If your use is camping rather than home backup, the C800 hits the right balance. Its 768Wh pack runs a humidifier-off CPAP roughly 10 hours — call it a couple of nights at modest pressure, or one comfortable night with the humidifier on — and at about 24 lb it's genuinely carryable, which the bigger units aren't. It's pure sine wave, has a sub-20ms UPS, charges fully in under an hour on the wall, and takes up to 300W of solar so you can top it back up between nights off-grid. Five AC outlets and a 12V car port give you a DC path for the CPAP if your machine supports it.

The trade-offs are mild. There's no expansion battery, so 768Wh is the ceiling — fine for a long weekend, tight for a week with the humidifier running. Anker has begun replacing it with the newer C800X, so check which one is in stock and at what price. And like every unit here, standard (quiet) charging is much slower than the headline fast-charge number. For a once-or-twice-a-year camper who wants real nights without a back-breaking unit, it's the pick.

3. Anker SOLIX C300X — best for travel

When the priority is small and light — a hotel, a tent, a single night's backup — the C300X is the floor that still works. It's pure sine wave, runs near-silent at about 25 dB (you can sleep next to it), and offers a ~10ms UPS plus a 140W USB-C port. The 288Wh battery covers roughly one full night with the humidifier off (about 8 hours at a 30W draw), which is exactly what a low-pressure traveler needs.

Two honest cautions. First, buy the C300X "AC" version, not the C300 DC Power Bank — the DC-only model has no AC inverter at all and can't run a standard wall-plug CPAP. Second, at 288Wh this unit is roughly one humidifier-off night; switch the humidifier on and you won't make it to morning, so plan to run dry or size up to the C800. And because it's over the 100Wh airline carry-on limit, it can't fly freely — 101–160Wh needs airline approval, and you can't check it. For road trips and tent camping it's ideal; for frequent flying, a sub-100Wh dedicated CPAP battery is the better tool.

4. Anker SOLIX C2000 Gen 2 — best for RV and van life

For boondocking with a CPAP, capacity and the right outlets win, and the C2000 Gen 2 has both. The 2,048Wh battery runs a humidifier-off CPAP for multiple nights, it's expandable to 4,096Wh for a week off-grid, and it has a real TT-30 30-amp RV outlet so you can plug a 30-amp shore cord straight in instead of running per-appliance extension cords. It idles at just 9W and stays quiet (~30 dB) at CPAP-level loads, with a 10ms UPS for outages. Pure sine wave throughout.

Two things to keep honest. A TT-30 outlet does not mean 3,600 watts on tap — the inverter's 2,400W continuous ceiling is the real limit, so don't expect to run a rooftop air conditioner and a coffee maker at once. And the older Anker F2000 (PowerHouse 767) gives you the same 2,048Wh and TT-30 outlet for about $1,999 — roughly $1,200 more for last-generation internals. Unless you find the F2000 deeply discounted, the C2000 Gen 2 is the obvious buy. We'll go deeper on RV power in a dedicated guide; for now, this is the unit.

5. Jackery Explorer 300 Plus — best budget, and the only published runtime

We're not going to pretend Anker is the only good answer. The Jackery Explorer 300 Plus is the same 288Wh class as the C300X, costs about the same, and does one thing none of the Ankers do: Jackery publishes the CPAP runtime — roughly 8.1 hours for a 30W machine and 4.7 hours at 40W. That transparency is worth a lot when you're sizing for a medical device. It's pure sine wave, light (~8.3 lb), and has a genuinely quiet "silent charging" mode under 45 dB, which matters bedside.

Where it slips behind the C300X: it relies on EPS rather than a true zero-gap UPS, so confirm the switchover behavior before trusting it as an always-on outage backup; it's not expandable; and it's the same one-humidifier-off-night capacity, so the humidifier still has to come off for camping. If you want the cheapest pure-sine unit with a maker-stated runtime and don't need instant UPS, it's the value pick — and a brand we're happy to recommend over a pricier Anker when it's the better fit.

6. EcoFlow DELTA 3 — the value alternative to the C1000

If the C1000's only real flaws are price and fan noise, the DELTA 3 is the answer to both. It's the same 1,024Wh, pure sine wave, with a sub-10ms UPS — and it runs quieter at the low wattage a CPAP pulls (under 30 dB at light loads), which is the difference next to a light sleeper. It's typically about $100 cheaper than the C1000, expands to 5,120Wh for serious off-grid use, charges flat-to-full in under an hour, and its X-Boost mode stretches usable output to 2,200W. For a CPAP, it does everything the C1000 does, a little quieter and a little cheaper.

The honest counterweight: EcoFlow's reputation has dings. A different model — the Delta Max 2000 — had a 2026 overheat/fire recall, and some owners report firmware-update friction. Its app is powerful but occasionally buggy. None of that is specific to the DELTA 3, but it's why we don't reflexively rank it first. Cross-shop it directly against the C1000 — we'll be publishing that head-to-head — and pick on price, noise tolerance and which app ecosystem you'd rather live in.

How to size it to your machine and your nights

Two quick filters get you to the right capacity.

Start with your machine and your humidifier. A low-draw machine run dry (no humidifier) is the easy case — a 288Wh unit like the C300X or Jackery 300 Plus covers a night. Run the humidifier and heated tube and your draw can triple, so you want a 768Wh C800 for a single comfortable night or the 1,024Wh C1000 for two. A thirsty machine like a ResMed AirSense 11 (~56W typical) eats batteries faster — size up a tier. If apnea backup at home is the goal, the C1000's instant UPS is the feature that matters; if it's camping, weight and solar input matter more.

Then match the unit to the trip. One travel night → C300X or Jackery 300 Plus. A long weekend → C800. Home outage backup, or a couple sharing → C1000 (or DELTA 3 for less). Living in an RV → C2000 Gen 2 with the TT-30 outlet. Whatever you pick, do a full dry run at home first: disable eco mode, decide humidifier on or off, and time a real night before you depend on it somewhere with no outlet.

Bottom line: for most people the Anker SOLIX C1000 is the one to buy — clean pure-sine power, a sub-10ms UPS so a blackout never interrupts therapy, and enough capacity for two machines or two to three humidifier-off nights. Travelers should drop to the C300X, campers to the C800, and RV owners to the C2000 Gen 2 with its TT-30 outlet. If budget rules, the Jackery Explorer 300 Plus is the honest value pick with a runtime its maker actually stands behind, and the EcoFlow DELTA 3 is the quieter, cheaper alternative to the C1000. Whatever you choose, the four settings up top — humidifier, DC vs AC, eco mode, pure sine — matter more than the logo. Get those right and you'll sleep through the night, not wake up to a silent machine.

Theo Hartley

Founder & Editor

Theo covers home tech in plain English — power, Wi-Fi, smart home and the gear actually worth your money. We test hands-on where we can and research transparently where we can't, and always say which. This is buying advice, not medical advice.