Powering a CPAP from battery has a few hard constraints. First, pure-sine-wave inverter is mandatory — modified-sine inverters interfere with the motor speed sensor on most ResMed and Philips machines, throwing pressure errors. Every model in our catalog runs a pure-sine inverter, so this filter is implicit. Second, fan noise: a CPAP user is by definition trying to sleep, so a station that ramps its cooling fan under load is not acceptable. Bluetti AC2A, Jackery Explorer 300 Plus and EcoFlow River 3 are all near-silent under a 60W load (CPAP territory).
Sizing for CPAP: with humidifier off, machines pull 30-40W average over 8 hours = ~280 Wh per night. With humidifier on, that doubles to 60-80W average = ~560 Wh per night. Add 8W of station idle draw, and you want a unit with at least 350-650 Wh usable. A 500 Wh LFP station gives you 1.5-2 nights without humidifier, or one full night with humidifier — comfortable margin for a weekend trip.
For travel, weight matters more than capacity headroom: most CPAP-from-battery shoppers are camping, RVing, or visiting houses where outlet access isn't certain. A 500 Wh / 5-6 kg LFP station is the sweet spot. For home-backup-during-outage, jump to the home-backup tier — a fridge running at the same time turns CPAP runtime into a small fraction of total demand.
| # | Model | Capacity | AC out | Chemistry | Weight | Price | $/Wh |
|---|---|---|---|---|---|---|---|
| 1 | EcoFlow DELTA 3 Ultra Plus Portable Power Station (3072Wh) EcoFlow 4.8 nights CPAP (60 W with humidifier) | 3,072 Wh | 3,600W | lifepo4 | — | $1,499 | $0.49 |
| 2 | EcoFlow DELTA 3 Ultra Plus Solar Generator (3072Wh) EcoFlow 4.8 nights CPAP (60 W with humidifier) | 3,072 Wh | 3,600W | lifepo4 | — | $2,099 | $0.68 |
| 3 | EcoFlow DELTA 3 Ultra Portable Power Station (3072Wh) EcoFlow 4.8 nights CPAP (60 W with humidifier) | 3,072 Wh | 3,600W | lifepo4 | — | $1,299 | $0.42 |
| 4 | EcoFlow DELTA 3 Ultra Portable Power Station (3072Wh) - Livestream Flash Sale EcoFlow 4.8 nights CPAP (60 W with humidifier) | 3,072 Wh | 3,600W | lifepo4 | — | $1,299 | $0.42 |
| 5 | EcoFlow DELTA 3 Ultra Series Portable Power Station (3072Wh) EcoFlow 4.8 nights CPAP (60 W with humidifier) | 3,072 Wh | 3,600W | lifepo4 | — | $1,499 | $0.49 |