CAMPING / KNOWLEDGE / CPAP POWER
Running a CPAP while camping: sizing and the questions that matter
A CPAP is the load that makes camping power a safety question rather than a convenience one. It also changes what you should prioritise, because it runs on a schedule you cannot interrupt.
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Overnight runtime above everything else
A CPAP runs seven to eight hours unattended. It consumes energy whether or not you are awake to manage it, and running out mid-night is not a convenience problem. Size for a full night with reserve, then multiply by the number of nights you will be away from mains power.
At a 30–60W draw without humidification, a 1,024Wh station returns roughly 11 to 20 hours using our standard planning formula. That comfortably covers one night and leaves reserve; a three-night trip needs a recharge plan.
DC compatibility: the biggest efficiency win
Running a CPAP through the inverter (DC to AC) and then back to DC through its own power brick wastes energy twice. Where the manufacturer offers a 12V/DC cable, use it. This is the single change that most improves overnight margin.
Check compatibility with your specific machine, humidifier and heated-hose configuration. Heated humidification substantially increases draw — in some configurations it doubles it. A figure quoted for a bare machine does not describe a machine with the heater running.
Noise, because the unit sits beside you
This is the one load where fan noise has a direct consequence. It runs all night, close to your head. Some manufacturers publish figures — BLUETTI specifies the Elite 100 V2 as low as approximately 30dB under lighter loads; EcoFlow specifies the DELTA 3 Plus below 30dB at 600W, rising to below 40dB at 1,200W. We have not measured either unit.
Published sound figures are not comparable unless distance, load and charging mode are all specified, which they usually are not. If noise keeps you awake, buy from a retailer with a workable return policy rather than relying on a spec sheet.
Uninterrupted power
All three 1kWh stations covered on our camping guide advertise UPS switching at or under 10ms, which is fast enough for CPAP. Verify against your own machine's requirements — and note that a power station's UPS mode is usually designed for the unit to be plugged in and passing mains power through, not for battery-only operation all night.
The fallback you should carry regardless
Never treat a camping power plan as life-support without a tested fallback. Confirm your machine's requirements with its manufacturer, carry a reserve battery or a second power source, and test the full overnight configuration at home before relying on it away from mains power.
Where to go next
This page is the reasoning. The product shortlist — which station, and why — is on the camping guide, which now covers only the buying decision.