Power Station for CPAP Camping
How long will a portable station run your CPAP overnight? Power figures below come from device official labels — never self-estimated.
Bottom line
Run your actual model through the calculator below — runtime depends on your device's own label wattage, heated humidifier on/off, and pressure settings. CPAP demand is evergreen (Google Trends: no seasonal gap).
CPAP power table (official labels only)
| Device / setting | Typical draw | Source |
|---|---|---|
| CPAP — no heated humidifier | 30 W typical | ResMed official typical (AirSense 11 spec page) |
| CPAP — heated humidifier on | 53 W typical | ResMed official typical (AirSense 11 spec page) |
| 12V DC car adapter (typical efficiency) | ≈ 90% | Adapter official rating |
Power figures only from device official labels per site policy — we do not self-estimate CPAP power.
Overnight runtime calculator
Usable capacity factor 0.85 (composite: ~90% inverter efficiency folded in); device draw treated as constant. Runtime values are estimates — always confirm with your device’s official label. Not medical advice.
Recommended stations by night count
1 night (8h)
2 nights (16h)
3 nights (24h)
Frequently asked questions
How many watts does a CPAP machine use?
Typical label figures: ~30 W without a heated humidifier, ~53 W with the heated humidifier on. Always check your own device's official label — numbers vary by model, pressure and humidifier settings.
Can I run a CPAP all night on a 300Wh station?
Roughly 293 Wh × 0.85 ÷ 53 W ≈ 4.7 h with humidifier, or ~8.3 h without — usually short of a full night for most users. A ~500 Wh+ station is the safer 8h floor.
Is a 12V adapter more efficient than the AC inverter?
Generally yes — DC→DC avoids inverter loss. Many CPAPs have a 12V DC adapter; use it when the station supports it. Figures above assume the 0.85 composite factor (≈90% inverter efficiency folded in).
How many nights can a station cover?
At 53 W: ~500 Wh ≈ 1 night (8h), ~1,000 Wh ≈ 2 nights, ~1,500 Wh ≈ 3 nights with solar recharge. Demand is evergreen year-round (Google Trends: no seasonal gap).