How Long Will a Power Station Run a CPAP?
Without the heated humidifier, a CPAP typically draws about 30 W. Over an 8-hour night that’s about 240 Wh at the machine, so a 1,000 Wh power station covers about 3.5 nights. Turn the humidifier and heated tubing on and the draw roughly doubles to about 60 W.
Always check your machine’s manual for its actual power rating and its guidance on battery use.
Runtime by power station
Nonstop runtime for one cpap at 30 W average, with 85% inverter efficiency. Models that can't supply its running or starting power are listed separately below.
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Tips
- Turning off the humidifier is the single biggest way to stretch a battery.
- Many CPAP makers sell a DC power cord that runs from a 12 V outlet. That skips the inverter and its losses. Only use cords your CPAP’s manufacturer approves.
- At small loads like a CPAP, the inverter’s own idle draw matters. Add 10–20 W under Settings in the runtime calculator for a conservative estimate.
- A power station with a UPS or EPS mode can keep the CPAP running when the grid drops at night. Confirm that your machine tolerates the switchover.
- Don’t rely on a single battery for any medical device. Talk to your doctor or supplier about a backup plan.
Questions
What size power station do I need for a CPAP?
Can I use a power station for a CPAP when camping?
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- Full appliance wattage chart
Sources
Wattage figures are typical values from the sources below. Your appliance may differ, so check its label or measure it with a plug-in watt meter.