Guide
BiPAP battery backup
A ResMed AirCurve BiPAP uses 8 to 9 W without a humidifier and up to 66 W with a humidifier and heated tube, close to a CPAP.
Medical safety notice: Will It Run? gives general power estimates only, not medical advice. Power draw varies by model, settings, pressure, humidifier and altitude. Before relying on any battery, power station, inverter or generator for a medical device, confirm approved power sources with the device manufacturer and your doctor or equipment supplier, and test your setup before an emergency. Never change prescribed settings to extend battery life. If your therapy is life-sustaining, keep the backup your supplier provides, register with your utility's medical-needs program, and have an evacuation plan. Run generators outdoors only, at least 20 ft from windows and doors, because of carbon monoxide risk. In an emergency, call 911.
| Machine and setting | Average draw | 8-hour night | Nights on a 1,024 Wh station, AC | On DC, best case | Source |
|---|---|---|---|---|---|
| ResMed AirCurve 11 VAuto BiPAP, no humidifier | 8 W | 64 Wh | 4.7 | 13.6 | ResMed |
| ResMed AirCurve 10 VAuto BiPAP, no humidifier | 9 W | 72 Wh | 4.5 | 12.1 | ResMed |
| ResMed AirCurve 10 VAuto BiPAP with HumidAir humidifier | 23 W | 184 Wh | 2.9 | — | ResMed |
| ResMed AirCurve 11 VAuto BiPAP with HumidAir humidifier | 34 W | 272 Wh | 2.2 | 3.2 | ResMed |
| ResMed AirCurve 10 VAuto BiPAP with HumidAir and heated tube | 41 W | 328 Wh | 1.9 | — | ResMed |
| ResMed AirCurve 11 VAuto BiPAP with HumidAir and heated tube | 66 W | 528 Wh | 1.3 | 1.6 | ResMed |
AC nights = 1,024 Wh × 0.85 usable ÷ ((watts + about 15 W inverter draw) × 8 hr). DC nights = 1,024 Wh × 0.85 ÷ (watts × 8 hr), a best case with the maker's DC converter (ResMed Air11, Air10 or AirMini) in a 12 V car port; — means DC isn't modeled for that setting (ResMed's AirSense 10 guide says humidity off on an external battery, and Philips publishes no DC figure). ResMed figures are lab measurements from ResMed's published power table; the Philips row is the 80 W power-supply ceiling, a worst case. The 15 W is the inverter's own draw: BLUETTI counts about 15 W of self-consumption in its AC180 runtime formula, and an owner test measured about 17.5 W on a DELTA 3 Plus; larger stations can idle higher. Method, DC converter limits and picks: CPAP power station guide. The RIVER 2, RIVER 3 Plus and SOLIX C300 DC figures use their 12 V car outputs (EcoFlow RIVER 2 manual: 100 W max; RIVER 3 Plus specs: 126 W max; Anker C300 guide: 12 V 10 A). The DELTA Pro 3 has 12 V Anderson and DC5521 outputs but no car socket, so it stays AC-only here.
Nights on each station (AirCurve 11 VAuto)
Anker SOLIX F3800 row: nights use about 40 W of idle draw instead of 15 W, because Anker's FAQ for the F3800 Plus lists about 40 W with AC on and nothing connected (Anker). At CPAP loads that cuts its nights by roughly a third to a half; see the F3800 idle table. The F3800 DC column uses its 12 V ⎓ 10 A car charger output (Anker US user guide), which skips the inverter.
Nights of 8 hours. AC = nameplate Wh × 0.85 ÷ (average draw + about 15 W inverter draw). DC = nameplate Wh × 0.85 ÷ average draw, a best case with ResMed's Air11 DC converter in the 12 V car port; — means no car port is listed in the maker specs we checked. As an Amazon Associate we earn from qualifying purchases. The 15 W is the inverter's own draw: BLUETTI counts about 15 W of self-consumption in its AC180 runtime formula, and an owner test measured about 17.5 W on a DELTA 3 Plus; larger stations can idle higher. Method, DC converter limits and picks: CPAP power station guide.
Philips BiPAP models are not listed because Philips does not publish a typical power draw.
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- CPAP camping: power without hookups
- How many watts does a CPAP use?
- CPAP on DC vs AC from a power station
- Can a car battery run a CPAP?
- What size solar panel for a CPAP?
- Best power station for a CPAP
Questions
How long will a power station run a BiPAP?
On AC, divide 85% of the station's watt-hours by the average draw in the table plus about 15 W for the station's inverter. On DC with ResMed's converter, divide by the average draw alone, a best case.
On home oxygen? Power station for an oxygen concentrator has maker wattages, hours by station and a backup-cylinder plan.