Best Power Station for CPAP Machines

For CPAP users, a power outage isn't just an inconvenience — it can mean a night without treatment. Here's how to choose the right power station specifically for CPAP backup, without overpaying for capacity you don't need.

What CPAP Machines Actually Draw

Most CPAP machines draw 30-60W without a humidifier, or 60-90W with the heated humidifier running. Over an 8-hour night, that works out to roughly 240-480Wh without humidifier, or 480-720Wh with it — see our full CPAP power outage guide for exact calculations by machine type.

Sizing Recommendation by Nights of Backup

Correction, October 3, 2026: an earlier version of this table understated the capacity needed, and the picks below overstated nights of runtime, by a wide margin. The numbers here are recalculated: capacity needed = nights × (CPAP watts × 8 hours) ÷ 0.85 usable. They use 40W without a humidifier and 80W with one; check your own machine's label.

These figures cover only the CPAP. Add the energy for anything else you plan to run, and consider solar recharging to stretch a long outage.

Our Top Picks for CPAP Users

Bluetti AC70 — 768Wh, quiet, compact. Covers about two nights of no-humidifier CPAP use per charge (about one night with a heated humidifier), with a little headroom for phone charging.

Jackery Explorer 1000 v2 — 1,070Wh. About 2.8 nights of no-humidifier CPAP on its measured usable capacity, and the best pick here if you want CPAP backup plus enough capacity to also run a router or a few lights during a longer outage.

Bluetti Elite 200 V2 or EcoFlow Delta 2 Max — about 2,050Wh each, roughly five nights of no-humidifier CPAP (about two and a half with a humidifier). The choice if you need a week-long outage covered, especially paired with solar panels.

EcoFlow River 3 — 245Wh runs a 40W CPAP for only about 5 hours, which is less than a full night. It suits short outages, a low-power CPAP, or a travel setup paired with recharging, not unattended overnight backup.

What Else to Consider for CPAP Specifically

• Pure sine wave output — nearly all mainstream LiFePO4 power stations provide this, which is important for sensitive medical equipment; verify this spec if considering a lesser-known brand.
• Quiet operation — you'll be sleeping near it, so check for any fan noise at low loads (most CPAP-range draws are well within silent operation for LiFePO4 units).
• A pass-through/UPS mode if you want it plugged in and charging normally, only kicking in automatically the moment grid power drops — useful for CPAP users who don't want to manually switch over mid-sleep.

Power Station vs. a Dedicated CPAP Travel Battery

A power station and a CPAP-specific travel battery solve different problems — here's how to pick between them:

For home outage backup, a power station wins on flexibility and capacity. For air travel specifically, a small dedicated CPAP battery is usually the only option that's actually allowed on a plane — see our flying with a power station guide for the exact FAA rules.

Talk to Your Doctor or DME Provider

This guide covers general power sizing, not medical advice — if your CPAP pressure settings or humidifier use are unusual, or you rely on additional medical equipment overnight, confirm your specific power needs with your durable medical equipment (DME) provider or physician.

Frequently Asked Questions

Will a power station damage my CPAP machine?

No — a properly functioning LiFePO4 power station with pure sine wave output is safe for CPAP machines and won't damage the device, as long as the power station's continuous output rating exceeds your machine's power draw.

How many nights should I plan for when buying?

Plan for at least the length of a typical outage in your region, plus a buffer. For hurricane-prone areas that can mean 5-7 nights, which is roughly 1,900-2,650Wh for a 40W CPAP with no humidifier, or about double that with a humidifier, so most people pair a 2,000Wh-class unit with solar panels rather than buying a much larger battery. See our hurricane preparedness checklist for regional guidance.