Quick answer
The Anker SOLIX C300X is the best power station for a CPAP machine for most people: a 288Wh LiFePO4 battery with a 10ms UPS switchover mode that Anker’s own product FAQ specifically calls out as fast enough for CPAP and other medical devices, in a quiet, roughly 9 lb body. For nights with a heated humidifier running, size up to the Bluetti AC50B (448Wh) or the Jackery Explorer 1000 v2 (1,070Wh) for multi-night coverage without a recharge. Budget-conscious buyers who don’t need the UPS switchover can save money with the standard EcoFlow River 3 Plus or Jackery Explorer 300 Plus instead.
A typical CPAP machine without a heated humidifier draws roughly 30-60 watts, meaning an 8-hour night of sleep uses somewhere around 240-480 watt-hours — numbers that line up closely with reporting from CPAP-focused power station vendors. Turn the humidifier on and that draw can climb past 70 watts, which is the single biggest variable in how many nights a given battery actually lasts.
Why CPAP power needs are different from camping or outage power
Most “best power station” buying guides size around running watts and total capacity. For a CPAP machine, two other factors matter just as much:
- Pure sine wave output. CPAP motors and their control electronics are sensitive enough that a cheaper modified-sine-wave inverter can make the unit run hot, hum audibly, or behave unpredictably. Every power station in this guide outputs pure sine wave AC, which is now standard across current LiFePO4 units from the major brands — but it’s worth double-checking on any unit outside this list, especially bargain or off-brand models.
- Bedroom noise. A power station sitting a few feet from your pillow all night needs to stay quiet. Anker’s own published spec for the SOLIX C300 line puts fan noise at roughly 25dB from 3.3 feet — close to a quiet room, not a running appliance — which is a genuine differentiator in this capacity class, not just marketing language. See our best quiet power station guide for how other brands’ “under 30dB” claims hold up once you check what mode they actually apply to.
Neither factor shows up if you only compare capacity and price, which is why a CPAP-specific pick list looks different from a general camping or outage roundup.
CPAP power stations at a glance
| Model | Best for | Capacity | Continuous / Surge | Nights (no humidifier) | Price | Rating |
|---|---|---|---|---|---|---|
| Anker SOLIX C300X | Best overall | 288Wh | 300W / 600W | ~1 night | ~$220-350 | ★★★★★ |
| Bluetti AC50B | Best with humidifier | 448Wh | 700W / 1,000W | ~1-1.5 nights | ~$399 | ★★★★☆ |
| Jackery Explorer 1000 v2 | Best for multi-night | 1,070Wh | 1,500W / n/a | ~2-3 nights | ~$799 | ★★★★★ |
| EcoFlow River 3 Plus | Best lightweight/travel | 286Wh | 600W / 1,200W | ~1 night | ~$269-299 | ★★★★☆ |
| Jackery Explorer 300 Plus | Best budget | 288Wh | 300W / 600W | ~1 night | ~$199-249 | ★★★★☆ |
1. Anker SOLIX C300X — Best Overall
Anker SOLIX C300X (288Wh)
- Anker's own published FAQ for the SOLIX C300 line specifically names the C300X's 10ms UPS switching mode as fast enough for CPAP machines and other medical devices — the clearest manufacturer-stated CPAP fit of any unit on this site.
- Same ~25dB bedroom-quiet fan noise as the standard C300, confirmed on Anker's own spec sheet, so it won't disturb sleep the way a louder unit in this class can.
- Same 288Wh/300W core battery as the standard C300 and C300 DC, so you're paying the UPS-mode premium for the medical-use feature, not a bigger battery.
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The C300X earns the overall pick because it’s the one unit in Anker’s own lineup — and the only one on this list — with a manufacturer-stated CPAP use case built into its switchover mode. For the base 288Wh/300W specs and how the C300X compares to the standard C300 and AC-less C300 DC, see our full Anker SOLIX C300 review.
2. Bluetti AC50B — Best With a Heated Humidifier
Bluetti AC50B (448Wh)
- 448Wh is a real step up from the 286-300Wh class, giving a CPAP with its heated humidifier running (pushing draw past 70W) meaningfully more than one full night per charge.
- 3,000+ cycle rating and a 5-year warranty — the same durability terms as Bluetti's larger AC70, despite the smaller, lighter body.
- 700W continuous output leaves headroom well above anything a CPAP and humidifier draw together, so there's no risk of tripping the inverter.
If the humidifier stays on every night, the extra capacity here is the difference between waking up to a dead battery and not. Read our full Bluetti AC50B review for the complete breakdown of where it sits in Bluetti’s lineup.
3. Jackery Explorer 1000 v2 — Best for Multi-Night Backup
Jackery Explorer 1000 v2 (1,070Wh)
- At roughly 2-3 nights per charge even with a humidifier running, this is the pick for an extended power outage where recharging isn't an option every day.
- Rated for roughly 4,000 cycles to 80% capacity, the highest cycle-life figure among the site's 1kWh-class picks — relevant for a unit that may sit charged in standby for months as a medical backup.
- 1,500W continuous output means it can run the CPAP alongside a phone charger, CPAP heated hose, or a small fan without any output concerns.
For anyone who treats CPAP backup power as part of a broader outage plan rather than a nightly-use item, the extra capacity buys real peace of mind. See our full Jackery Explorer 1000 v2 review for the deeper spec breakdown.
4. EcoFlow River 3 Plus — Best Lightweight/Travel Pick
EcoFlow River 3 Plus (286Wh)
- At 10.4 lb, this is light enough to pack for a trip without a second thought — relevant for CPAP users who travel regularly and don't want to carry a heavier unit just for backup power.
- EcoFlow's own specs cite a sub-10ms UPS switchover, close to the C300X's medical-grade speed, at a lower price than Anker's X-series premium.
- Expandable to 858Wh with an EB300 or EB600 add-on battery if nightly needs grow later without replacing the whole unit.
If the C300X’s medical-use branding isn’t the deciding factor, the River 3 Plus delivers nearly the same switchover speed and a night of runtime at a lower price. Read our full EcoFlow River 3 Plus review for the complete breakdown.
5. Jackery Explorer 300 Plus — Best Budget
Jackery Explorer 300 Plus (288Wh)
- The lowest street price of any pick here while still covering one full CPAP night without a humidifier, per Jackery's own 288Wh/300W specs.
- 5-year total warranty (3 years standard plus 2 with free registration) — longer than its own newer v2 successor, a rare case where the outgoing model beats the replacement on paper.
- No standout UPS-switchover feature, so this pick fits best for someone running the CPAP straight from a full battery overnight rather than relying on instant backup from wall power.
For buyers who just need reliable, quiet overnight power without paying for medical-branded switchover speed, this is the cheapest pick that still clears every core requirement. See our full Jackery Explorer 300 Plus review for the generation change story behind why it’s still sold despite being replaced on Jackery’s own site.
How to size a power station for your CPAP
- Find your machine’s actual wattage, not just a nameplate rating — measured draw is often lower than the printed label, and varies with pressure setting and mask leaks. A kill-a-watt meter or your DME provider can tell you the real number.
- Add roughly 50% if you run a heated humidifier or heated hose — that’s the single biggest swing factor between a one-night and a multi-night power station.
- Confirm pure sine wave output on the spec sheet for any unit outside this list — modified-sine inverters can make a CPAP motor run hot or hum.
- Don’t rely on raw watt-hour math alone. A 288Wh unit divided by a 40W draw suggests over 7 hours, but real-world losses through the inverter (often 10-15% above the CPAP’s stated draw) and any standby drain mean actual runtime typically comes in a bit under the raw math.
- Check with your CPAP manufacturer or sleep clinician before relying on any backup power source for medical use, especially if you have a condition where missing a night of therapy carries real risk.
For a broader outage-backup setup beyond just the CPAP, see our best power station for home backup picks. Not sure how much total capacity your whole setup needs? Our power station sizing guide walks through the watt-hour math device by device. Traveling with the CPAP specifically? Our best portable power station for camping picks cover the same compact, lightweight class from a travel angle.
The bottom line
The Anker SOLIX C300X is the best power station for a CPAP machine for most people — it’s the one unit on this list with a manufacturer-stated CPAP use case built into its fast UPS switchover mode, in a quiet, roughly 9 lb body. Nights with a heated humidifier running call for the Bluetti AC50B’s extra capacity, and anyone treating CPAP backup as part of a longer outage plan should size up further to the Jackery Explorer 1000 v2. Frequent travelers will appreciate the EcoFlow River 3 Plus’s lighter body and near-identical switchover speed at a lower price, and the Jackery Explorer 300 Plus remains the cheapest pick that still covers a full CPAP night without a humidifier.