ResMed AirSense 10 DC Adapter: Car, RV & Battery Setup (2026)
By Lee Arnold
Medical Solar Power Backup Specialist | 8+ years in the field
Quick Answer:
The AirSense 10 uses 24V DC. Two types: a 12V converter (for cars) and a 24V passthrough cable. Most cars need a converter. Most CPAP-specific batteries output 24V already. They need only a passthrough cable. The wrong type wastes money and causes setup headaches.
One cable links the machine to a car battery or power station. That cable looks similar no matter which type it is. The difference is inside — one boosts voltage, one passes it through.
This mistake is common. A passthrough cable from a 12V port will not power the machine. A 12V converter on a 24V power station works but adds losses.
This guide covers both types and which to buy for your setup. I’ve run both cable types across dozens of camping and RV setups. The efficiency difference is measurable and the compatibility confusion is real.
Table of Contents
Two Types of AirSense 10 DC Adapters
Type 1: 12V-to-24V Converter
Use when: Your power source outputs 12V DC.
Correct for:
- Standard car and truck cigarette lighter sockets (12V)
- RV house battery systems (typically 12V)
- Power stations with only a 12V DC output port
The converter steps 12V up to 24V for the machine. Quality converters add fuse protection and over-voltage shutoff. The HKY 90W DC Converter leads this category. See my resmed airsense 10 power cord guide for full details.
Type 2: 24V Passthrough Cable
Use when: Your power source already outputs 24V DC.
Good for:
- CPAP-specific batteries (Medistrom Pilot-24 Lite, BiXPower 24V models)
- Portable power stations with a 24V DC output port (TalentCell, Progeny, some EcoFlow models)
- Any battery system already regulated to 24V
The passthrough cable is simpler — no conversion circuit. It connects the machine’s barrel connector to the battery’s 24V DC port. Less electrical complexity means fewer failure points and marginally better efficiency.
Recommended: iGuerburn 24V DC Cable (for 24V Power Stations)
Specs:
- Input: 24V DC (DC5521 or DC5525 socket on the power station)
- Output: 24V DC to AirSense 10 barrel connector
- Cable length: 3.3 feet (1 meter)
- Compatible: AirSense 10 (all variants), AirCurve 10, AirStart 10
- Includes: 1 cable + 1 adapter connector (5.5mm × 2.5mm alternative tip)
- Price: ~$10-15
Critical note: This cable only works with 24V power sources. Do not use it with a 12V car socket.
The iGuerburn connects a 24V battery directly to the machine. No converter. No adapter circuit. The AirSense 10 barrel connector sits on one end. The DC5521/DC5525 port sits on the other.
Compatible sources: Medistrom Pilot-24 Lite, TalentCell PB120B1, Progeny 300W, and 24V stations.
Best for: AirSense 10 users who already own a CPAP-specific 24V battery and need the cable to connect them.
Recommended: KFD 12V/24V Universal Car Adapter (for Cars & Mixed Sources)
Specs:
- Input: 9-32V DC (accepts both 12V and 24V sources)
- Output: 24V 3.75A 90W to AirSense 10
- Compatible: AirSense 10, AirCurve 10, AirStart 10, Lumis VPAP series
- Safety: OVP, OCP, SCP protection (over-voltage, over-current, short-circuit)
- Compatible power stations: EcoFlow Delta, Bluetti, Anker 757/767, XT60-equipped stations
- Price: ~$15-25
The KFD accepts 9V to 32V DC — the widest range available. The OVP/OCP/SCP protection shuts down on unsafe voltage or current.
Sources:
- 12V car lighter sockets
- 24V truck cab outlets
- Power stations with 12V or 24V DC ports
- RV battery systems at 12V or 24V
Most converters at this price skip one or two of those protections. The KFD includes all three.
My test: KFD on a Jackery 1000 v2 for 3 camping nights. AirSense 10 at pressure 10, no humidifier. The adapter stayed cool throughout all three sessions. No error codes. The Jackery DC port read a consistent 12.1V each session.
Best for: AirSense 10 users who need one adapter that works across cars, RVs, trucks, and power stations.
Choosing the Right Adapter: Quick Decision Guide
| Power Source | What You Have | Right Adapter |
|---|---|---|
| Car or truck lighter socket | 12V output | KFD or HKY converter |
| RV house battery with 12V outlet | 12V output | KFD or HKY converter |
| RV house battery with 24V outlet | 24V output | iGuerburn passthrough |
| Medistrom Pilot-24 Lite battery | 24V DC port | iGuerburn passthrough |
| TalentCell PB120B1 battery | 24V DC port | iGuerburn passthrough |
| EcoFlow Delta DC port | 12V output | KFD converter |
| Bluetti AC200L DC port | 12V output | KFD converter |
| Portable power station (unverified) | Check label | Confirm output voltage |
One rule: Always check the DC output port voltage on your power source before buying a cable. It’s on the label next to the port, or in the power station’s manual.
DC vs AC Efficiency on the AirSense 10
A DC adapter route saves measurable battery capacity versus inverter use.
| Method | Conversion Steps | Typical Efficiency |
|---|---|---|
| Battery → inverter → AC adapter → AirSense 10 | 3 conversions | ~75-80% |
| Battery → 12V/24V DC adapter → AirSense 10 | 1-2 conversions | ~88-93% |
| Battery 24V port → passthrough cable → AirSense 10 | 1 connection | ~95-98% |
At 35W over 8 hours, DC direct saves 15-25Wh versus inverter use. On a 300Wh battery, that’s 30-45 extra minutes of therapy per charge.
I’ve verified this in field testing. The iGuerburn on a TalentCell 24V battery covered 9 full nights. The same battery through AC inverter covered only 7 nights. The two extra nights came from eliminating conversion losses.
See my cpap battery backup guide for full runtime estimates. See my best portable power station for cpap guide for compatible picks.
FAQs on the AirSense 10 DC Adapter
Will the DC adapter work with the humidifier on?
Yes. Both the KFD and iGuerburn are rated at 90W. That covers the AirSense 10 at full humidifier and heated hose settings. At 12V input, the car side draws roughly 7-8A. Verify your car socket fuse handles that.
Can I use the DC adapter for international travel?
DC adapters connect to car batteries and power stations — not outlets. For international wall use, the standard 100-240V AC power supply works anywhere. No voltage converter is needed for wall use.
Does the OEM ResMed DC converter work better than third-party options?
ResMed’s OEM DC converter carries the same spec: 24V, 90W, 12V/24V input. Certified brands like KFD and HKY match that output specification. The OEM runs $60-80; third-party picks run $15-25. Performance difference in normal use is negligible.
How much power does the AirSense 10 draw on DC?
Draw depends on your pressure and humidifier setting. At pressure 10, no humidifier, the AirSense 10 pulls roughly 30-38W. See my resmed airsense 10 power consumption guide for a full breakdown. See my cpap wattage guide for battery sizing math.
What DC port size does the AirSense 10 use?
The AirSense 10 barrel connector is 5.5mm outer diameter, 2.5mm inner pin. The S10 port is 5.5mm × 2.5mm. Different from the AirSense 11 connector.
Bottom Line
The right AirSense 10 DC adapter depends on your power source.
For car and 12V sources, use the KFD Universal Adapter.
For 24V batteries, the iGuerburn passthrough cable is the simplest direct option.
The AASM recommends consistent nightly CPAP use — even while traveling. A $15 DC adapter and a power station make that possible anywhere.
See my resmed airsense 10 power cord guide for AC adapter options. See my cpap 12v adapter guide for the full car adapter guide.
