Portable Power Stations for CPAP Machines during Power Outages
Choosing a Power Station for a CPAP Machine
People use a CPAP (Continuous Positive Airway Pressure) machine primarily to treat obstructive sleep apnea (OSA). In this condition, breathing repeatedly stops or slows during sleep due to a blocked or narrowed airway. Power outages are a grave concern for those who use a CPAP machine. I will provide guidance on what to consider when selecting a portable power station to power a CPAP machine. I will also offer several recommendations, with my top pick listed at the end.
Key specifications to understand are the CPAP machine power consumption numbers and the power station’s ability to run with those numbers.
Average CPAP Macine Power Consumption
- Typical usage: 30–60 watts per hour (without heated humidifier)
- With humidifier: 60–90+ watts per hour
- Total for 8 hours: 300–400 watt-hours (Wh) without humidifier; up to 800 Wh with humidifier
Tip: For most users, a power station with a capacity of at least 300–400 Wh is recommended for a whole night (8 hours) of CPAP machine use on a low setting without a humidifier. If the budget allows, consider a higher capacity to provide a safety margin.
Key Features to Look For
- Battery capacity: At least 300–400 Wh for one night
- Pure sine wave inverter: Ensures compatibility with sensitive medical devices
- Multiple output options: AC, DC, and USB ports for flexibility
- Portability: Lightweight and easy to carry for travel or camping
- UPS function: Provides automatic backup during power outages (optional but helpful)
Recommended Portable Power Stations For CPAP Machines
All within the following list output a pure sine wave.
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| Model | Capacity (Wh) | Approx. CPAP Runtime (No Humidifier) | Weight | Notable Features |
|---|---|---|---|---|
| Jackery Explorer 300 | 293 | 1 night (8 hrs, low setting) | ~7 lbs | Compact, easy travel |
| Bluetti EB3A | 268 | 1 night (close to 8 hrs, low setting) | ~10 lbs | Fast charging, UPS |
| Anker 535 PowerHouse | 512 | 1–2 nights | ~16 lbs | Durable, multiple outputs |
| Jackery Explorer 500 | 518 | 1–2 nights | ~13 lbs | Lightweight for its power capacity |
| Bluetti AC70 | 768 | 2–3 nights | ~22 lbs | Fast recharge and fast UPS |
| EcoFlow Delta 2 | 1024 | 3–4 nights | ~27 lbs | Very fast recharge, UPS (EPS) |
Note: For CPAP machine use with a humidifier, select a power station with a capacity of at least 600-800 Wh for reliable overnight operation.
Practical Advice
- Power Storage Capacity: Check your CPAP machine specifications to determine the power usage in the mode you typically use (in watts). Then multiply by how many hours of sleep. This is the minimum capacity power station to consider. More is better.
- Safety margin: Choose a power station with 10–20% more capacity than your calculated need.
- UPS Feature: For a life-threatening condition while you sleep, this is an important feature to consider.
CPAP Machine Power Station Summary
For most users, a portable power station with approximately 300–400 Wh capacity will power a CPAP machine for one 8-hour night without a humidifier. Estimations listed above are based on 37 running watts. If you use a humidifier or want extra backup, opt for a model with 500 Wh or more.
My Recommendation for a Power Station for CPAP Machines
The bigger your budget, the more power capacity you can buy.
Moreover, it’s important to note the significance of the UPS (uninterruptible power supply) feature for some of you. This feature automatically switches your CPAP machine to the power station in the event of a grid power loss, such as during sleep. If this is a particular concern for you, three of the models listed above have this feature. The Bluetti EB3A, Bluetti AC70, and EcoFlow Delta 2 all feature a UPS (Uninterruptible Power Supply) function.
Considering the options provided and product availability as of the current post date, if I were facing a life-threatening sleep issue requiring a CPAP machine, I would confidently choose the Bluetti AC70. Its life-saving potential, portability (suitable for vehicle trips or camping), and quick UPS switch time make it a top choice.
The EcoFlow Delta 2 is also a great option, albeit a bit heavier (more capacity). I would be happy with either one for use with a CPAP machine.
If my reason for using a CPAP machine were not a life-threatening condition and I didn’t need to use a humidifier, I would be happy with the budget-friendly Jackery 300 for one night’s emergency use, given its very lightweight portability; the next step up would be the Anker 535 (I would personally choose this over the Jackery 300 for its capacity margin – but both would technically work). Neither has UPS functionality, but that’s not necessary for a non-life-threatening condition.
If you’re using a CPAP machine with a heated humidifier, you’ll need a power station with an adequately large capacity. The EcoFlow Delta 2 listed above is my minimum recommendation, as power consumption would be considerably higher.
I purchased an EcoFlow Delta 2 Max as a UPS backup for my chest freezers. It would also serve well for CPAP machines, with its double capacity, compared to the Delta 2. Like anything else, the more money spent, the more you get…
One last thing… Don’t forget that these need recharging. The longer the power is out (e.g., days), the greater the capacity of the power station you will need.
Hope this helps!
Difference Between Ecoflow DELTA 2 vs DELTA 2 Max
Top Features of EcoFlow DELTA 2 Max Portable Power Station
Portable Power Stations Under 10 lbs: Anker 521 PowerHouse
My choice was to just buy a 12 volt power supply for the CPAP machine and then use a 12 Volt battery directly. Works great for me! They are available on Amazon.