Best CPAP battery backup for power outages

The short answer

The best CPAP battery backup for most people is a CPAP-specific battery made for their machine's voltage, such as Medistrom's Pilot-24 Lite for ResMed AirSense 11 or the Pilot-12 Lite for DreamStation. Turn the humidifier off on battery. For several nights or a heated humidifier, a 1,000 Wh power station gives far more margin.

At a glance

CPAP-specific batteries

Power stations for CPAP

No.	Model	Capacity	Cont. / surge	Chemistry / fuel	Weight
01	Best for multiple nightsAnker SOLIX C1000Two or more nights, a heated humidifier, or a CPAP plus a fridgeFull specs, strengths and tradeoffsCheck price on Amazon	1,056 Wh	1,800 / 2,400 W	LiFePO4	28.44 lb
02	Best compact UPSEcoFlow RIVER 3 PlusA nightstand unit that switches over fast and can grow laterFull specs, strengths and tradeoffsCheck price on Amazon	286 Wh	600 / 1,200 W	LiFePO4 (LFP)	10.4 lb
03	Small bedside UPSJackery Explorer 300 v2Short outages and a DC connection through the 12 V car portFull specs, strengths and tradeoffsCheck price on Amazon	288 Wh	300 / 600 W	LiFePO4	8.16 lb

• 01

  Best for multiple nightsAnker SOLIX C1000
  

  Two or more nights, a heated humidifier, or a CPAP plus a fridge

  Capacity

  1,056 Wh

  Cont./surge

  1,800 / 2,400 W

  Chem./fuel

  LiFePO4

  Weight

  28.44 lb

  Full specs, strengths and tradeoffs
  Check price on Amazon
• 02

  Best compact UPSEcoFlow RIVER 3 Plus
  

  A nightstand unit that switches over fast and can grow later

  Capacity

  286 Wh

  Cont./surge

  600 / 1,200 W

  Chem./fuel

  LiFePO4 (LFP)

  Weight

  10.4 lb

  Full specs, strengths and tradeoffs
  Check price on Amazon
• 03

  Small bedside UPSJackery Explorer 300 v2

  Short outages and a DC connection through the 12 V car port

  Capacity

  288 Wh

  Cont./surge

  300 / 600 W

  Chem./fuel

  LiFePO4

  Weight

  8.16 lb

  Full specs, strengths and tradeoffs
  Check price on Amazon

No. 1Best for multiple nights

Anker SOLIX C1000

Best for: Two or more nights, a heated humidifier, or a CPAP plus a fridge

1,056 Wh covers about 16 hours at ResMed's 56.1 W typical figure for the AirSense 11 power supply, through the AC outlet. Anker lists a 12 V car outlet for a DC converter, a UPS switchover under 20 ms, and expansion to 2,112 Wh.

Strengths

• Covers a heated humidifier for a night
• Also runs a fridge in the day
• UPS mode

Tradeoffs

• About 28 lb, not a travel unit
• More capacity than a CPAP alone needs

• Note: A newer C1000 Gen 2 has different specs. Make sure the listing matches the model you want.

Capacity	1,056 Wh
AC output	1,800 W continuous / 2,400 W surge
Battery	LiFePO4
Weight	28.44 lb
Max solar input	600 W
Rated cycles	3,000 cycles to 80%+
AC outlets	6
Expansion	Up to 2,112 Wh with the matching expansion battery

Check price on AmazonRead the full reviewSpecs: manufacturer page, checked Nov 1, 2026

No. 2Best compact UPS

EcoFlow RIVER 3 Plus

Best for: A nightstand unit that switches over fast and can grow later

EcoFlow lists a sub-10 ms UPS switchover, so a CPAP plugged into it keeps running when the grid drops. 286 Wh covers about 4 hours at 56.1 W or about 8 hours at 30 W. An extra battery takes it to 858 Wh.

Strengths

• Under 10 ms UPS
• 10.4 lb
• Expandable to 858 Wh

Tradeoffs

• Base capacity is short for a full night with heat on
• Extra battery sold separately

• Note: X-Boost runs some higher-watt resistive devices at reduced power (up to 1,200 W per EcoFlow).

Capacity	286 Wh
AC output	600 W continuous / 1,200 W surge
Battery	LiFePO4 (LFP)
Weight	10.4 lb
Max solar input	220 W
Rated cycles	3,000 cycles to 80%
AC outlets	3
UPS switchover	<10 ms
Expansion	Up to 858 Wh with an EcoFlow extra battery

Check price on AmazonRead the full reviewSpecs: manufacturer page, checked Nov 1, 2026

No. 3Small bedside UPS

Jackery Explorer 300 v2

Best for: Short outages and a DC connection through the 12 V car port

Jackery lists a UPS response of 0.01 s or less, a 12 V 10 A car port and an energy-saving mode with a continuous-output option for all-night use. 288 Wh is a short-outage battery for a CPAP, not a multi-night one.

Strengths

• 8.16 lb
• 12 V car port for a DC converter
• Continuous-output setting

Tradeoffs

• 300 W AC output
• Not expandable
• About 4 hours at 56.1 W through AC

• Note: Jackery's FAQ lists SolarSaga panels up to 100 W, about 9.5 h with a 40 W panel, 76 min on AC and about 4 h from a 12 V car port.

Capacity	288 Wh
AC output	300 W continuous / 600 W surge
Battery	LiFePO4
Weight	8.16 lb
Max solar input	100 W
Rated cycles	4,000 cycles to 70%+
AC outlets	2
UPS switchover	≤10 ms

Check price on AmazonRead the full reviewSpecs: manufacturer page, checked Nov 1, 2026

Full write-ups: Anker SOLIX C1000 review, EcoFlow RIVER 3 Plus review and Jackery Explorer 300 v2 review.

How much battery does a CPAP need

Start with your machine's own figures. ResMed's AirSense 11 user guide lists its 65 W power supply at 56.1 W typical and 73.2 W peak power consumption. Champion Power Equipment's wattage chart gives a broader planning range: 30 to 60 W for a CPAP without heat, and 60 to 120 W with a heated humidifier.

These are conservative numbers. Power supply ratings describe what the brick can deliver, not what your machine averages at your pressure. Medistrom says its 95 Wh batteries give 1 to 2 nights at an average pressure with the humidifier and heated tubing off, which implies a much lower average draw than the table's top rows. Your actual use depends on pressure, mask leak, humidity settings and room temperature.

Find your own number

1. 01Read the power section of your CPAP's user manual and the label on its power supply.
2. 02If you can, run one normal night through a plug-in electricity usage meter and note the Wh used.
3. 03Multiply by the nights you want to cover, then add margin for the humidifier if you plan to use it.
4. 04Check how you will recharge: solar, a car, or a generator running outdoors.

DC vs AC: connect the efficient way

The AirSense 11 power supply turns household AC into 24 V DC, per ResMed's user guide. Plug the CPAP's normal brick into a power station's AC outlet and the energy goes from battery DC to AC and back to DC, with losses each time. A DC connection skips that. CPAP-specific batteries like the Pilot-24 Lite output 24 V DC directly. ResMed also lists an Air11 DC/DC converter accessory, which lets the machine run from a 12 V source such as a power station's car port. Ask your DME supplier which DC cable or converter is approved for your exact machine.

• Match the voltage. ResMed AirSense machines use 24 V batteries such as the Pilot-24 Lite; DreamStation machines use 12 V batteries such as the Pilot-12 Lite.
• Buy the right cable kit. Medistrom says the AirSense 11 and DreamStation 2 need cable kits sold separately.
• Turn off auto-shutoff. Some stations power down at low loads to save energy. Jackery's 300 v2 has a continuous-output setting for all-night use. Check yours before you need it.

The humidifier is the biggest variable

On Champion's figures, a heated humidifier can double a CPAP's draw. Medistrom's runtime claims assume the humidifier and heated tubing are off. If you can sleep without heat for a night or two, turning it off is the single biggest way to stretch a battery. If you cannot, size up to a 1,000 Wh station and recharge it each day.

Before the next outage

• Tell your electric company and fire department you have a medical device that needs power, as the FDA advises.
• Ready.gov advises having alternate plans for power-dependent medical devices.
• Keep the battery charged and do a one-night trial run at home.
• After the power returns, check that your CPAP's settings have not changed (FDA).
• If you use a generator to recharge, run it outdoors only, more than 20 feet from windows, doors and vents (CDC), never in a garage, with battery CO alarms inside.

For more on medical prep, see our first aid and medical prep kit. BackupPowerAI's CPAP backup power guide covers DC adapters and multi-night sizing.