People still type “CPAP generator” into a search box. The only honest thing we can add is: look at the power-supply numbers, multiply by hours, and leave a margin. We are not telling you to run therapy from a camping battery.
Published numbers (ResMed AirSense 11 user guide)
| Item | Figure | Source |
|---|---|---|
| Power supply unit | 65 W class | ResMed AirSense 11 user guide |
| Typical power consumption | 56.1 W (111.5 VA) | Same guide, 65 W PSU table |
| Peak power consumption | 73.2 W (137.6 VA) | Same guide |
| DC output of PSU | 24 V, 2.71 A | Same guide |
Those “typical” and “peak” figures are manufacturer electrical specs for the 65 W supply, often with humidifier and heated tube in the test condition. Real draw with humidity off is often lower — we do not have a Ranked measurement, so we will not invent 20 W. If you need a number for math practice, use the published typical 56.1 W and treat it as conservative.
Arithmetic only
Energy per 8-hour night at 56.1 W: 56.1 × 8 = 448.8 Wh at the device. Through an 85% efficient AC inverter: 448.8 / 0.85 ≈ 528 Wh from the battery.
| Nights at 56.1 W × 8 h, 85% inverter | Wh from battery | Mfr. packs that exceed that Wh |
|---|---|---|
| 1 night | ≈ 528 Wh | Explorer 500 v2 512 Wh is short. RIVER 2 Pro 768 Wh clears it. 1000 v2 1070 Wh clears it. |
| 2 nights, no recharge | ≈ 1,056 Wh | 1000 v2 1070 Wh is on the edge. AC180 1152 Wh. 2000 v2 2042 Wh is comfortable on Wh alone. |
| 3 nights, no recharge | ≈ 1,584 Wh | 2000 v2 2042 Wh. Not a 1 kWh sealed box. |
Inverter watts: 73.2 W peak is far below every AC inverter on this site. The constraint is energy, not watts — if someone were using AC. A DC cable (where the manufacturer supports it) avoids inverter loss; we are not certifying any DC cable for a therapy device.
Again: this is not a recommendation to power a CPAP from a portable station. Manufacturer medical disclaimers exist for a reason.
Sources
ResMed AirSense 11 user guide (document.resmed.com), 65 W PSU table: typical 56.1 W, peak 73.2 W. Station watt-hours from manufacturer PDPs in README.md. Jackery 2000 v2 FAQ medical disclaimer on jackery.com. Checked 9 September 2026.