You have just fallen asleep when the power goes out. The house goes quiet and your CPAP stops. That is unsettling if you sleep with a CPAP every night. How much backup power do you need?
Start with your own device. Consumption differs per CPAP, per setting and per use of a heated humidifier. A few checks in advance give peace of mind.
Why CPAP backup power deserves extra attention
Most people can miss one or a few nights without CPAP, but sleeping without treatment can cause complaints. What is medically responsible differs per person. Therefore always discuss your situation with your doctor, home ventilation center or CPAP supplier. Do not change settings yourself if that affects your treatment.
The Longfonds and home ventilation centers signal that there is still no clear national advice for power-dependent patients. The government asks households through the Denk vooruit campaign to be able to manage for 72 hours. For CPAP users, a personal power plan belongs in that preparation. Also read our guide to preparing for 72 hours.
How much power does a CPAP use during an outage?
As a branch guideline you can assume 30 to 90 watts. Actual consumption depends on the model and the settings. Without a heated humidifier consumption is clearly lower than with heating.
Watt is the power your device asks. Watt-hour, abbreviated Wh, is the amount of energy in a battery. A CPAP that averages 40 watts uses about 240 Wh in six hours. For more explanation read what mAh and Wh mean.
Check the manual and the information on the adapter. Ask your supplier which consumption is realistic for your settings. Also consult the manual of your CPAP device and your supplier to determine whether the device may run on a power station.
Important
A consumer power station is not a certified medical backup power provision. Always check with your CPAP supplier whether your specific model may run on a power station.
Calculating a CPAP power station with Mobisun Pro
A battery does not deliver its full stated capacity to a connected device. For this calculation example we use 85 percent efficiency.
The Pro Air 2.0 has a 308 Wh LiFePO4 battery. The calculation is 308 Wh times 85 percent, so about 262 Wh usable. The Pro Air has 154 Wh. Of that, about 131 Wh remains usable.
Formula
Usable capacity = battery capacity in Wh x 0.85. Runtime = usable capacity ÷ consumption in watts.
| Product | CPAP consumption | Estimated runtime |
|---|---|---|
| Pro Air 2.0, 308 Wh | 40 W | about 6.5 hours |
| Pro Air 2.0, 308 Wh | 60 W | about 4.5 hours |
| Pro Air 2.0, 308 Wh | 90 W | about 3 hours |
| Pro Air, 154 Wh | 40 W | about 3 hours |
| Pro Air, 154 Wh | 60 W | about 2 hours |
These are calculation examples, not a guarantee for a full night. The result depends on your CPAP, settings and heated humidifier. Therefore check your own situation.
The Mobisun Pro Air 2.0 delivers 500 watts continuous and 1,000 watts peak. It weighs 6 kilograms, is IP67 dust-tight and waterproof and has an integrated 23 watt SunPower solar panel. Charging works via USB-C or an adapter. The battery is suitable for more than 3,000 charge cycles, about eight years. The screwed, non-glued construction is fully repairable. You get a one-year factory warranty. This model is designed and produced in the Netherlands.
The Mobisun Pro Air has 300 watts continuous output, weighs 4.3 kilograms and has IP54 protection. The integrated SunPower panel delivers 29 watts. Charging goes via an adapter, not via USB-C. This model is also fully repairable and has a one-year factory warranty.
Recommended for CPAP nights: Mobisun Pro Air 2.0
Do you want to bridge the longest possible night with one device? The Pro Air 2.0 combines 308 Wh usable capacity with an integrated solar panel that recharges the battery during the day, designed and produced in the Netherlands.
Supplementing home ventilation backup power with solar
Both models can be expanded with a separate foldable solar panel of 60 to 100 watts. This lets you top up energy during the day if the grid is down for longer.
The yield depends on the sun. See solar energy as a supplement to a charged battery, not as a guarantee for every night.
Backup power for more than just your CPAP
During a power outage you may also want to charge a phone, keep the router working or use lighting. Sometimes power is needed to keep medicines refrigerated. Check the storage instructions for that and discuss an emergency plan with your pharmacist or care provider.
All devices share the same battery. Energy for communication, lighting or cooling is no longer available for your CPAP. Therefore put your treatment at the top of your energy budget. Our 72-hour preparation guide helps to review all necessities together.
The limits of a consumer power station
A Mobisun Pro is a consumer power station, not a certified medical backup power provision. We do not claim that every CPAP is suitable or that a power station guarantees medical continuity. We also make no statement about a pure sine wave inverter or charging while a device remains connected. Consult the manual of your CPAP device and your supplier about whether the device may run on a power station.
The 154 Wh Pro Air and 308 Wh Pro Air 2.0 may not be taken as hand luggage on a plane under the IATA rules of 2026. Both exceed the limit of 100 Wh.
If you need guaranteed or long-term power, discuss with your doctor, supplier or home ventilation center which provision fits.
Practical preparation for a CPAP power outage
- Write down the brand, model, power and settings of your CPAP.
- Ask your supplier whether your device may run on a power station and which connection is needed.
- Check the expected consumption with and without heated humidifier. Only adjust a treatment setting after consulting your care provider.
- Calculate the desired runtime in Wh and take conversion losses into account. The table uses 85 percent efficiency.
- Choose the battery capacity based on the hours needed. Only reserve capacity for other devices if your calculation allows it.
- Charge the power station and do a practical test at home in time, without endangering your treatment.
- Keep the contact details of your doctor, supplier or home ventilation center ready. Agree with your partner or caregiver what you will do if the outage lasts longer than the battery.
Frequently asked questions about CPAP backup power
How many watts does a CPAP device use?
According to branch guidelines a CPAP uses about 30 to 90 watts. The exact consumption depends on the model and the settings. A heated humidifier clearly asks more power.
How long does a CPAP run on the Mobisun Pro Air 2.0?
At 85 percent efficiency about 262 Wh of the 308 Wh is usable. That is roughly 6.5 hours at 40 watts, 4.5 hours at 60 watts and 3 hours at 90 watts.
Is the Mobisun Pro Air enough for one CPAP night?
That depends on your consumption and the length of your night. Of 154 Wh about 131 Wh remains usable at 85 percent efficiency. That is about 3 hours at 40 watts and 2 hours at 60 watts.
May my CPAP run on a power station?
That cannot be confirmed in general. Consult the manual of your CPAP device and ask your supplier whether your specific model may run on a consumer power station.
May a Mobisun Pro be taken on a plane?
No. Both 154 Wh and 308 Wh exceed the IATA limit of 100 Wh for hand luggage in 2026. Both models may therefore not be taken as hand luggage.
Choose the right backup power for your CPAP
Calculate your consumption, determine how many hours you want to bridge and pick the Mobisun Pro that fits. Designed and produced in the Netherlands, fully repairable.
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