Calculate exactly how long a portable power station will run your CPAP machine. Select your machine model, pressure setting, humidifier and heated tube usage, and battery capacity. Includes DC vs AC efficiency comparison and camping recommendations.
Only for "Custom / Other" model or if you know your exact draw.
DC operation typically adds 15–25% more runtime by skipping two power conversions. Use a DC-DC cable designed for your CPAP model.
Calculate to see personalized CPAP battery recommendations.
Understanding CPAP power consumption is critical for planning camping and travel. Below are typical power draw figures for popular CPAP, APAP, and BiPAP machines. These are approximate averages — actual consumption varies based on pressure setting, leak rate, breathing pattern, and accessory usage.
| Model | Motor Only | + Humidifier | + Heated Tube | Per Night (8h, dry) |
|---|---|---|---|---|
| ResMed AirSense 10 (AutoSet) | 20–30W | 50–80W | 60–100W | 160–240 Wh |
| ResMed AirSense 11 (AutoSet) | 18–28W | 45–70W | 55–90W | 144–224 Wh |
| ResMed AirMini (Travel) | 15–25W | N/A | N/A | 120–200 Wh |
| Philips Respironics DreamStation | 20–30W | 50–75W | 60–90W | 160–240 Wh |
| Philips Respironics DreamStation 2 | 18–28W | 45–65W | 55–80W | 144–224 Wh |
| Philips Respironics System One | 25–35W | 55–85W | 65–100W | 200–280 Wh |
| Fisher & Paykel SleepStyle | 22–32W | 55–80W | 65–95W | 176–256 Wh |
| 3B Medical Luna II | 20–30W | 50–75W | N/A | 160–240 Wh |
| ResMed AirCurve 10 (BiPAP) | 30–45W | 60–100W | 70–120W | 240–360 Wh |
| ResMed Astral (Ventilator) | 35–60W | 70–110W | N/A | 280–480 Wh |
Important: These numbers are averages based on a typical pressure setting of 8–12 cm H2O. Higher pressures, significant mask leaks, or BiPAP/ST modes can increase consumption by 20–50%. For medical devices, always test your specific setup at home before relying on it for camping or travel. Never disable features essential to your therapy just to save power.
AC power is what you get from a standard wall outlet. When you plug your CPAP into a portable power station's AC outlet, here is what happens:
DC power means connecting your CPAP directly to the battery voltage (12V or 24V) using a special DC-DC cable — no inverter involved.
Bottom line: For maximum CPAP runtime on a portable power station, always use DC power with a proper DC-DC cable if your machine supports it. The 15–25% runtime gain is significant — it can mean the difference between making it through a 3-night trip or running out on night 2. Most major CPAP manufacturers sell official DC cables, and there are many third-party options available.
CPAP is medical equipment — never rely on a single power source. Bring a backup battery or power bank, know the nearest location with power, and consider a small travel CPAP as a spare. Your health is worth the redundancy.
Before your trip, do a full test run at home on battery power for at least one full night. Verify runtime, check for any error codes, make sure all accessories work, and confirm you know how to connect everything. Do not discover problems at the campsite.
Invest in a good DC-DC cable for your CPAP model. The 15–25% extra runtime is worth far more than the cost of the cable. Make sure the cable is rated for your machine's voltage (12V or 24V) and has the correct connector.
For trips longer than 2–3 nights, portable solar panels are a game-changer. A 100W panel can recharge a 500Wh station in 1–2 days, letting you camp indefinitely. Foldable panels are easy to pack and set up.
The humidifier uses almost as much power as the motor itself. If you need to stretch battery life, turn the humidifier down or off (use a nasal spray instead for dryness). Only do this if you can tolerate it — never sacrifice therapy effectiveness.
Many power stations have ECO mode that shuts off power when the draw is very low. CPAP machines draw very little during exhale and might trigger the ECO shutoff. Always disable ECO mode on your station when using it for CPAP.
Lithium batteries lose 20–40% of their capacity below freezing. If camping in cold weather, keep your power station inside your sleeping bag or an insulated bag, or at least inside the tent. Never leave it outside in freezing temperatures.
If flying to your destination, make sure your battery meets airline rules (under 100Wh for carry-on without approval, 100–160Wh with airline approval). Spare lithium batteries cannot go in checked luggage — always carry them on the plane with you.
Common questions about CPAP batteries and portable power stations.
Runtime depends on your CPAP model, pressure setting, and whether you use humidifier and heated tube. A typical setup (ResMed AirSense 10, pressure 10, no humidifier, 8 hours) uses about 180–250Wh per night, so a 500Wh power station gives roughly 2 nights. With humidifier and heated tube, consumption roughly doubles (350–500Wh per night), so a 1000Wh station gives about 2 nights. Using DC power instead of AC increases runtime by 15–25% by skipping the inverter efficiency loss.
For CPAP camping, we recommend at least a 500Wh power station (gives 1–2 nights depending on settings). For 2–3 nights comfortably with some margin for safety, go with 1000–1500Wh. For longer trips (4+ nights), add solar panels (100–200W) so you can recharge during the day. Always get a station with a pure sine wave inverter (required for safe CPAP operation) and consider using the DC output with a DC-DC converter for maximum efficiency and runtime.
Yes — CPAP machines (especially newer models with advanced features like heated humidifiers, AutoSet algorithms, and data logging) require pure sine wave power for proper and safe operation. Modified sine wave can cause motor noise, overheating, incorrect pressure delivery, and even damage the motor or electronics over time. All quality portable power stations use pure sine wave inverters, but budget generators and cheap inverters may not. Always check for "pure sine wave" on the spec sheet before buying for CPAP use.
Yes — the heated humidifier is typically the biggest power consumer on a CPAP machine, often using more power than the motor itself. A humidifier typically adds 20–50W of continuous draw, roughly doubling total power consumption compared to dry-only operation. Using a heated tube adds another 10–20W on top of that. For maximum battery life when camping, turn off the humidifier or use it on the lowest setting you can tolerate. Using a heated humidifier can cut your runtime in half compared to dry operation.
You have two options: 1) AC plug (most common and universal): simply plug your CPAP's AC adapter brick into the power station's wall outlet. Easy, works with any machine, but slightly less efficient. 2) DC power (most efficient): use a DC-DC converter cable designed for your specific CPAP model that plugs into the 12V car port or DC barrel jack on the power station. This is 15–25% more efficient because it skips the DC-to-AC inversion. You can buy official DC cables from your CPAP manufacturer or third-party ones on Amazon — just make sure the voltage and connector match your machine.
Absolutely — portable power stations are the #1 choice for CPAP camping because they are completely silent, produce no fumes or exhaust (unlike gas generators), and can be safely used inside a tent or RV. Just make sure to: get a station with pure sine wave output, size it for at least 2 nights (3 with a safety buffer), consider using DC power for 15–25% more runtime, and turn off humidifier or heated tube if you need to conserve power. Many people use 500–1000Wh stations for weekend CPAP camping trips with great results.
Higher pressure settings use more power, but the effect is relatively modest compared to humidifier use. Going from 5 cm H2O to 20 cm H2O increases motor power draw by roughly 30–50% (from about 20W to 30–35W on a typical machine). AutoSet machines may use slightly more on average than fixed-pressure machines if they frequently ramp up to higher pressures during the night. The big power difference comes from accessories: humidifier, heated tube, and mask heating — these can double or triple total consumption.
CPAP machines internally run on low-voltage DC (typically 12V or 24V). When you plug into a wall outlet (AC), the power brick converts AC to DC. When you use a power station's AC outlet, the station first converts its DC battery to AC, then your CPAP brick converts it back to DC. That double conversion wastes 15–25% of energy as heat. Using a DC-DC cable directly from the station's 12V output skips both conversions and gives you 15–25% more runtime from the same battery. DC operation also produces less heat and is slightly quieter.
ResMed AirSense 10: roughly 20–30W base (motor only, no humidifier, typical pressure ~10 cm H2O), 50–80W with humidifier on medium, 60–100W with humidifier + heated tube. Per night (8 hours): about 160–240Wh dry, 400–640Wh with humidifier + heated tube. AirSense 11 is slightly more efficient due to its newer motor design — about 10–15% less power overall for equivalent settings. Actual numbers vary based on your specific pressure setting, breathing pattern, mask leak rate, and humidifier heating level.
Yes — this is a great solution for longer camping trips. A 100W solar panel produces roughly 300–500Wh per day (at 4–6 hours of good sun with 70% real-world efficiency), which is enough to fully recharge a 500Wh station in 1–2 days and keep your CPAP going indefinitely. For reliable off-grid CPAP, we recommend a 500–1000Wh power station + 100–200W of solar panels. This setup lets you camp as long as you want without worrying about running out of power for your therapy, as long as you get reasonable sunlight.