Can the EcoFlow RIVER 2 Pro Run a CPAP Machine?
Yes. With 768Wh of LiFePO4 battery capacity (653Wh usable after 85% AC inverter conversion) and a 800W continuous / 1600W surge pure sine wave inverter, the EcoFlow RIVER 2 Pro should run a CPAP / BiPAP Machine (Standard Mode) for approximately 12.3 hrs on a single charge.
- Usable Watt-Hours: The EcoFlow RIVER 2 Pro holds 768Wh, which yields about 653Wh of 120V AC power, assuming ~15% DC-to-AC inverter loss.
- CPAP Machine Duty Cycle: While active, a CPAP Machine pulls 45W (with a 60W startup spike). Over a multi-hour period, its 100% duty cycle averages ~45W per hour (plus ~8W inverter standby overhead).
- Tip: Look for a power station with UPS/EPS (<20ms Auto-Switchover) like the Jackery 1000 v2, Anker SOLIX C1000, or EcoFlow DELTA 2. You plug the power station into the wall and your CPAP into the power station—if the grid goes down at 2:00 AM, your CPAP stays on without skipping a breath.
Compare With an Alternative
EcoFlow RIVER 2 Pro
Multi-night CPAP, 12V camping fridges, Starlink & short fridge backup
Sits between small camping batteries and full home-backup units. 768Wh is enough for several CPAP nights or a 12V camping fridge for more than a day.
- 768Wh capacity with 4 AC outlets at 17.2 lbs
- 0–100% wall recharge in about 70 minutes (EcoFlow spec)
- EPS backup mode with <30ms switchover for routers and CPAPs
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EcoFlow DELTA 2
Full-size refrigerators, coffee makers, microwaves & 1-day home blackouts
A balanced 1kWh-class unit: a 1,800W inverter (2,700W surge) covers most single household appliances, it weighs 27 lbs, and it can expand to 3,040Wh later with an extra battery.
- 1,800W continuous / 2,700W surge handles fridges, coffee makers and microwaves (one at a time)
- 0–80% wall charge in about 50 minutes (EcoFlow spec)
- Expandable to 3,040Wh with an extra battery
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Inexpensive Add-Ons for Running a CPAP Machine on Battery
Running a CPAP from the 12V/DC port skips inverter losses and can roughly double runtime.
Measures what your appliance actually draws, so you size from real numbers instead of estimates.
Lets the power station sit where it's convenient without voltage drop on motor loads.
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