ResMed S9 DC Converter 24V/90W Output

The ResMed S9 DC Converter lets you operate any S9 CPAP or BiLevel machine — with or without the H5i Heated Humidifier and ClimateLine tubing — from a 12V or 24V DC power source, like those found in many cars, boats, trucks, and other vehicles.

Is This the Right Converter for You?

This is the correct accessory if you own a ResMed S9 CPAP or BiLevel machine and want to run it off vehicle power or an external 12V/24V battery, whether for road trips, boating, or off-grid camping. It works with or without the H5i Heated Humidifier attached. It does not work with the ResMed Power Station (RPS) II Battery Pack, which requires a separate cable — see the note below.

Key Features at a Glance

• Powers any S9 CPAP or BiLevel machine from a 12V or 24V DC source
• Works with or without the H5i Heated Humidifier and ClimateLine tubing
• Approximately 7.5 feet of cord length
• Includes a DC adapter cable with alligator clips for direct connection to an external battery
• Genuine ResMed part built for the S9's specific power requirements

What's Included

• DC Converter cable (approx. 7.5 ft.)
• DC adapter cable with alligator clips, for connecting directly to an external battery

Compatibility

This converter works with any ResMed S9 CPAP or BiLevel machine, with or without the H5i Heated Humidifier and ClimateLine tubing attached. It is not compatible with the ResMed Power Station (RPS) II Battery Pack — that battery requires a separate DC cable (Part 24961).

Important Usage Information

Using a non-ResMed DC cord with your S9 CPAP or BiLevel may damage your machine. This converter is built specifically to match the S9's power requirements — using a generic or third-party DC cord instead carries real risk to your equipment.

Specifications

Complete Your S9 Setup

Keep your machine running clean with the ResMed Disposable Standard Filters or Hypoallergenic Filters for S9 Series machines. If you're considering an upgrade from the S9, current-generation ResMed machines include the AirSense 10 and AirSense 11 series. See more from the brand on the ResMed brand page.

Frequently Asked Questions

Does this work with the H5i Heated Humidifier?

Yes. This converter works with your S9 whether or not the H5i Heated Humidifier and ClimateLine tubing are attached.

Can I use this with the ResMed Power Station (RPS) II Battery Pack?

No. The RPS II requires a different cable (Part 24961). This converter is for connecting your S9 directly to a vehicle's 12V/24V outlet or an external battery via the included alligator-clip cable.

Can I use a generic or third-party DC cord instead?

This isn't recommended. Using a non-ResMed DC cord with your S9 CPAP or BiLevel may damage your machine. This converter is built specifically to the S9's power requirements.

What voltage does this support?

It works with both 12V and 24V DC power sources, covering most car, truck, and boat outlets, and is rated for 24V/90W output.

How do I connect this to an external battery rather than a vehicle outlet?

Use the included DC adapter cable with alligator clips, which connects directly to an external battery's terminals.