Best Portable Power Stations for CPAP Machines (2026)
Medical Device Notice
CPAP and BiPAP machines are prescribed medical devices. Before using any power station with your CPAP, consult your equipment provider or physician to confirm compatibility. This guide provides general technical information, not medical advice.
Quick Answer
The most important requirement for CPAP use: a pure sine wave inverter, all power stations on this page have one. For capacity: a CPAP without humidifier draws approximately 30–60W, requiring ~240–480Wh per night. With a heated humidifier, add ~35W (total ~280–880Wh per night). Best picks: EcoFlow Delta 2 (~$799, 1,024Wh) for 2+ nights of CPAP plus apartment essentials; Jackery Explorer 1000 v2 (~$499, 1,070Wh) for the same coverage at a lower price; EcoFlow River 2 (~$299, 256Wh) for CPAP-only overnight backup without humidifier.
Why CPAP Machines Require Pure Sine Wave Inverters
All AC power stations convert DC battery power to AC through an inverter. There are two types of AC output: pure sine wave and modified sine wave.
Pure Sine Wave
Pure sine wave output replicates the smooth, continuous AC waveform that comes from the utility grid. CPAP and BiPAP machines are designed to operate on pure sine wave power. Their internal power supplies, motor controls, and heated humidifier elements are tuned to a clean sine wave. All major portable power stations from EcoFlow, Jackery, Bluetti, and Goal Zero produce pure sine wave output.
Modified Sine Wave: don't Use with CPAP
Modified sine wave inverters produce a stepped approximation of a sine wave. Many older or budget-tier power stations and inverter generators use this output type. On modified sine wave power, CPAP machines may: overheat their power supply circuitry, produce audible buzzing or humming, display error codes, operate at reduced efficiency (drawing more watts than rated), or fail prematurely. The CPAP machine's own manual typically specifies "pure sine wave only" or "utility-grade AC power." If you see "modified sine wave" anywhere in a power station's specs, don't use it with your CPAP.
Quick Check: How to Confirm Pure Sine Wave
Look for "pure sine wave" in the product specifications. If it says only "sine wave" without the "pure" qualifier, verify with the manufacturer before purchasing. All power stations recommended on this page are confirmed pure sine wave.
CPAP Watt-Hour Calculator
To calculate how much capacity you need, you need three numbers: your CPAP's wattage at your prescribed pressure, whether you use a heated humidifier, and how many hours per night you sleep.
CPAP Power Consumption by Mode
| CPAP / Mode | Wattage | Wh for 8 hrs | Nights on 1,024Wh (Delta 2) |
|---|---|---|---|
| ResMed AirSense 11, no humidifier, 10 cmH2O | ~33W | ~264Wh | ~3.5 nights |
| ResMed AirSense 11, heated humidifier, level 3 | ~65W | ~520Wh | ~1.7 nights |
| ResMed AirSense 10, no humidifier | ~30W | ~240Wh | ~3.8 nights |
| ResMed AirSense 10, heated humidifier | ~60W | ~480Wh | ~1.9 nights |
| Philips DreamStation 2, no humidifier | ~30W | ~240Wh | ~3.8 nights |
| Philips DreamStation 2, heated humidifier | ~65W | ~520Wh | ~1.7 nights |
| ResMed AirMini (travel CPAP), no humidifier | ~18W | ~144Wh | ~6 nights |
| BiPAP / VPAP, no humidifier | ~50–90W | ~400–720Wh | ~1.3–2.3 nights |
| BiPAP, heated humidifier | ~80–130W | ~640–1,040Wh | ~0.9–1.4 nights |
Note: Wattage varies by pressure setting, humidifier temperature, ambient temperature, and firmware. The figures above are representative; your actual consumption may differ by ±20%. Check your CPAP's data card or app for measured power consumption if available. Inverter efficiency (~85–90%) is factored into these estimates.
The Formula
Example: 60W CPAP × 8 hours × 1.15 = 552Wh minimum capacity
The 1.15 multiplier accounts for inverter losses and ensures you don't run the battery completely flat (which shortens LFP cycle life). If you also want to run a router (10W), charge a phone (5–10W avg), and keep a lamp on (10W), add another ~200Wh to your minimum.
Top Power Station Picks for CPAP Use
Best Overall: EcoFlow Delta 2 (~$799)
The Delta 2 is the top recommendation for CPAP users who also want to power other apartment essentials during an outage. Its 1,024Wh of LFP capacity covers 3+ nights of CPAP without a humidifier or nearly 2 nights with humidifier, plus leaves substantial capacity for router, phone, lights, and refrigerator. The 1,800W pure sine wave output handles everything a CPAP user might need. WiFi app control lets you monitor battery level remotely, which is genuinely useful if you want to know your remaining runtime before going to sleep.
| Capacity | 1,024Wh |
|---|---|
| Inverter Type | Pure Sine Wave ✅ |
| AC Output | 1,800W continuous |
| CPAP nights (no humidifier, 33W) | ~3.5 nights |
| CPAP nights (heated humidifier, 65W) | ~1.7 nights |
| Chemistry | LFP, safe for bedroom storage |
| Noise at idle / low load | 0 dB (fan activates above ~600W) |
| App | WiFi + Bluetooth |
| Price | ~$799 |
Best Value: Jackery Explorer 1000 v2 (~$499)
For CPAP users on a budget, the Explorer 1000 v2 provides nearly identical capacity to the Delta 2 at $300 less. At 1,070Wh with pure sine wave output and LFP chemistry, it covers the same CPAP runtime scenarios. The 1-hour fast charge is particularly useful during extended outages with intermittent grid restoration. The Bluetooth-only app (no WiFi remote) is the main practical limitation, you'll need to physically check the unit to see the battery level, which some users find inconvenient in a bedroom setup.
Check Price on Amazon →Best Budget Pick: EcoFlow River 2 (~$299)
For CPAP users without a heated humidifier, the River 2's 256Wh is sufficient for one full night of sleep (33W × 8 hrs = 264Wh, right at the limit with buffer). It's designed for this exact use case, EcoFlow markets it specifically for CPAP backup, and it's the lightest option (7.7 lbs) for travel and portability. Its 5-year warranty, WiFi app, and pure sine wave output make it a premium-quality entry-level option. Important: it won't cover CPAP with humidifier for a full night. If you use a humidifier, step up to the Bluetti AC70 or higher.
Check Price on Amazon →| Unit | Price | Capacity | Sine Wave | CPAP nights (no hum.) | CPAP nights (humidifier) |
|---|---|---|---|---|---|
| EcoFlow Delta 2 | ~$799 | 1,024Wh | ✅ Pure | ~3.5 | ~1.7 |
| Jackery 1000 v2 | ~$499 | 1,070Wh | ✅ Pure | ~3.6 | ~1.8 |
| Bluetti AC70 | ~$329 | 768Wh | ✅ Pure | ~2.5 | ~1.3 |
| EcoFlow River 2 | ~$299 | 256Wh | ✅ Pure | ~0.9 nights | ❌ Insufficient |
Estimates based on 33W CPAP (no humidifier) and 65W CPAP (heated humidifier at level 3). Assumes 85% inverter efficiency. Actual runtime varies by model and pressure setting.
DC Mode: Getting More Runtime from Your Power Station
Many CPAP machines, including the ResMed AirSense 10, AirSense 11, and AirMini, can operate on DC power directly, bypassing the AC inverter entirely. Using DC power instead of AC eliminates inverter conversion losses (~10–15% efficiency gain) and can meaningfully extend battery runtime.
How DC Mode Works
ResMed sells a DC/DC converter (the ResMed 24V DC Converter) that connects your CPAP directly to the 12V or 24V DC output ports available on most portable power stations. Instead of: battery → inverter → AC → CPAP power supply → DC motor, the path becomes: battery → DC converter → DC motor. Fewer conversion steps means less energy lost to heat.
DC Mode Runtime Improvement
Using DC mode on a ResMed AirSense at 10 cmH2O reduces effective power draw from ~33W (AC mode) to approximately 20–25W (DC mode), a 25–35% improvement in runtime. On a 1,024Wh unit like the Delta 2, that extends CPAP runtime from ~3.5 nights to ~4.5+ nights without a humidifier.
Note: Heated Humidifier Can't Run in DC Mode
The heated humidifier requires AC power, it can't be used with a DC converter. If you use a humidifier, you must use AC mode and accept the higher power draw. Alternatively, turning off the humidifier during outages (or reducing its temperature setting) significantly extends runtime.
Frequently Asked Questions
What power station do I need for a CPAP machine?
You need a power station with a pure sine wave inverter. For capacity: a CPAP without humidifier uses ~30–60W, requiring 240–480Wh for 8 hours of sleep. With a heated humidifier, add ~35W (280Wh per night extra). The EcoFlow Delta 2 (1,024Wh, ~$799) and Jackery Explorer 1000 v2 (1,070Wh, ~$499) both cover 1.5–3.5 nights of CPAP use plus other essentials. The EcoFlow River 2 (256Wh, ~$299) covers one night without a humidifier.
How many watts does a CPAP use?
A CPAP without a heated humidifier draws approximately 30–60 watts depending on the model and pressure setting. The ResMed AirSense 11 draws ~33W at 10 cmH2O without humidifier. With a heated humidifier at medium setting, total draw is approximately 60–110W. An 8-hour night without humidifier requires approximately 240–480Wh; with humidifier, approximately 480–880Wh.
Does a CPAP need a pure sine wave inverter?
Yes. CPAP and BiPAP machines require pure sine wave AC power. Modified sine wave output can overheat CPAP power supplies, reduce motor lifespan, produce audible buzzing, and trigger error conditions. All power stations from EcoFlow, Jackery (v2 series), Bluetti, and Goal Zero produce pure sine wave output. Avoid any unit listed as "modified sine wave."
How long will a 1,000Wh power station run a CPAP?
A 1,000Wh power station running a CPAP without humidifier (33W) lasts approximately 3.5 nights of 8-hour sleep. With a heated humidifier (65W), it lasts approximately 1.7 nights. Actual runtime depends on your CPAP model, pressure setting, humidifier level, and inverter efficiency. Using DC mode (if your CPAP supports it) can extend runtime by 25–35%.
Can I run a CPAP humidifier on a power station?
Yes, if you've sufficient capacity. Heated humidifiers add approximately 30–50W to CPAP draw. At 65W total (CPAP + humidifier), a 1,000Wh unit lasts approximately 1.7 nights per charge. The Jackery Explorer 1000 v2 (~$499) and EcoFlow Delta 2 (~$799) are the minimum recommended for CPAP with humidifier. Reducing humidifier temperature to its lowest effective setting can cut draw by 20–40% and meaningfully extend runtime.
Related Guides
- Best Portable Power Stations for Apartments, Full roundup for all apartment use cases
- Best Power Stations Under $500, Budget picks with full specs
- How Many Watt-Hours Do I Need?, Full appliance calculator including CPAP scenarios
- LFP vs NMC Battery Chemistry, Why LFP is the right choice for indoor CPAP backup