What Size Power Station or Generator Runs a CPAP Machine?
A modern CPAP such as the ResMed AirSense 11 averages about 40 W with its heated humidifier on (up to 65 W with heated tubing at high pressure), or just 15 W with humidification and heated tubing turned off.
EcoFlow RIVER 2 Pro
Lowest upfront cost among verified LFP stations that clear the CPAP machine's 65W starting surge.
Goal Zero Yeti PRO 4000
Largest LFP battery reserve (3993Wh) for indoor zero-emissions backup.
Westinghouse iGen5000DF
Longest continuous tank endurance with 5000W starting headroom for multi-day grid failures.
Running cpap machine alongside a refrigerator, medical device, or Starlink? Calculate coincident runtimes and inverter capacity in the Load Builder.
All 16 Tested Power Sources Ranked for CPAP Machine
| Rank & Source | Spec | Status | Surge Margin | Low | Typical Runtime | 12V DC / LPG | Price | Node |
|---|---|---|---|---|---|---|---|---|
| 768Wh · 800W | RUNS | +95.9% (1600W) | 29.3h | 14.4 HRS | 19.7h (+36.4%) | $449 | Open → | |
| 1152Wh · 1800W | RUNS | +97.6% (2700W) | 37.0h | 19.8 HRS | 24.1h (+21.5%) | $499 | Open → | |
| 1070Wh · 1500W | RUNS | +97.8% (3000W) | 34.3h | 18.4 HRS | 27.4h (+49%) | $499 | Open → | |
| 1056Wh · 1800W | RUNS | +97.3% (2400W) | 33.9h | 18.1 HRS | 27.0h (+48.9%) | $599.99 | Open → | |
| 1536Wh · 2200W | RUNS | +98.5% (4400W) | 47.7h | 26.0 HRS | 39.3h (+51.4%) | $699 | Open → | |
| 1024Wh · 1800W | RUNS | +97.6% (2700W) | 32.8h | 17.6 HRS | 26.2h (+48.9%) | $999 | Open → | |
| 2048Wh · 2400W | RUNS | +98.6% (4800W) | 2.7d (66h) | 35.2 HRS | 2.2d (52h) (+48.9%) | $1,049 | Open → | |
| 2048Wh · 2400W | RUNS | +98.2% (3600W) | 2.7d (66h) | 35.2 HRS | 2.2d (52h) (+48.9%) | $1,299 | Open → | |
| 2042Wh · 3000W | RUNS | +98.9% (6000W) | 2.5d (60h) | 33.4 HRS | 2.2d (52h) (+56.5%) | $1,499 | Open → | |
| 3840Wh · 6000W | RUNS | +99.3% (9000W) | 3.9d (93h) | 2.3 DAYS | 4.1d (98h) (+74.3%) | $2,899 | Open → | |
| 4096Wh · 4000W | RUNS | +99.2% (8000W) | 4.1d (99h) | 2.5 DAYS | 4.4d (105h) (+74.4%) | $3,199 | Open → | |
| 3993Wh · 3600W | RUNS | +99.1% (7200W) | 4.4d (105h) | 2.6 DAYS | 4.3d (102h) (+66.7%) | $3,499 | Open → | |
| 3.4gal · 3900W | RUNS | +98.7% (5000W) | 36.1h | 35.2 HRS | 42.9h (LPG) | $949 | Open → | |
| 2.25gal · 3500W | RUNS | +98.6% (4500W) | 28.1h | 27.3 HRS | 40.7h (LPG) | $999 | Open → | |
| 8.3gal · 10500W | RUNS | +99.5% (13000W) | 21.6h | 21.5 HRS | 16.3h (LPG) | $1,299 | Open → | |
| 0.95gal · 1800W | RUNS | +97% (2200W) | 16.0h | 15.1 HRS | — | $1,347.99 | Open → |
BENCHMARK_MODELS // CPAP MACHINE
65 W AC power supply (part 39205, 24 V DC output); draws ~15 W without humidification and 40–65 W with HumidAir 11 and ClimateLineAir 11
90 W AC power supply (part 370001); 53 W typical running draw with HumidAir humidifier, 104 W peak
REVERSE_SIZER_QA // VERIFIED ANSWERS
What size power station or generator do I need for a CPAP machine?
To run a CPAP machine reliably across all scenarios, choose a power source rated for at least 65 W continuous output and 90 W peak starting surge (typical draw is 40 W running / 65 W surge, averaging 40 W over time).
What is the best budget power station for a CPAP machine?
The lowest-cost verified station in our database that runs a CPAP machine is the EcoFlow RIVER 2 Pro ($449), delivering about 14.4 hours on AC or 19.7 hours via 12V DC.
Which battery station gives the longest runtime for a CPAP machine?
The Goal Zero Yeti PRO 4000 (3993 Wh) delivers the longest single-charge battery runtime at about 61 hours.