How many nights will the EcoFlow RIVER 3 Plus run a CPAP with heated humidifier?

Not a full night: about 7 hours, short of 8 hours. A CPAP with heated humidifier averages about 34 W, and the 286 Wh battery gives about 243 Wh after inverter losses.

How much longer does it last without the heated humidifier?

With the heated humidifier on (about 34 W), under one night (7 hrs). Without it (about 7 W), about 4 nights (35 hrs). Turning the humidifier off is the easiest way to stretch a charge.

Is the EcoFlow RIVER 3 Plus enough backup for a CPAP with heated humidifier?

Only as a short bridge. It covers about 7 hours from a full charge. A power station should never be your only backup for medical equipment: ask your equipment supplier what they provide in an outage, register with your utility’s medical-needs program, and keep the settings your prescriber gave you.

EcoFlow · Will it run?

Can the EcoFlow RIVER 3 Plus run a CPAP with heated humidifier?

Published October 10, 2026

Short answerYes

Yes. The EcoFlow RIVER 3 Plus runs a CPAP with heated humidifier for about 7 hours from a full charge, less than one 8-hour night. At about 34 W on average it uses 14% of the battery an hour, and the 600 W output is far more than it needs.

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Key numbers

Nights per charge: 7 hrs; from a full charge
Battery used per hour: 14%; at 34 W average

CPAP with heated humidifier

Running: 34 W; 22–60 W range
Start-up: 104 W
Average: 34 W; runs all the time

EcoFlow RIVER 3 Plus

Battery: 286 Wh; about 243 Wh usable
Output: 600 W; continuous
Surge: 1,200 W; start-up peak

How we worked it out: 286 Wh × 0.85 ÷ 34 W = about 7 hours (8 hours a night). The 0.85 covers inverter and battery losses. We do not test units ourselves; the numbers come from the official spec sheets and typical device draws. How we pick

EcoFlow RIVER 3 Plus

286 Wh · 600 W output · 1,200 W surge · 10.4 lb

Full specs and runtimes

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What else the EcoFlow RIVER 3 Plus runs

One device at a time, from a full charge.

Other power stations for a CPAP with heated humidifier

The nearest sizes that also run it.

Keep going

Real runtime depends on the model you own, room temperature and battery age. The 7 hours above is an estimate, not a measured result.

Common questions

How many nights will the EcoFlow RIVER 3 Plus run a CPAP with heated humidifier?: Not a full night: about 7 hours, short of 8 hours. A CPAP with heated humidifier averages about 34 W, and the 286 Wh battery gives about 243 Wh after inverter losses.
How much longer does it last without the heated humidifier?: With the heated humidifier on (about 34 W), under one night (7 hrs). Without it (about 7 W), about 4 nights (35 hrs). Turning the humidifier off is the easiest way to stretch a charge.
Is the EcoFlow RIVER 3 Plus enough backup for a CPAP with heated humidifier?: Only as a short bridge. It covers about 7 hours from a full charge. A power station should never be your only backup for medical equipment: ask your equipment supplier what they provide in an outage, register with your utility’s medical-needs program, and keep the settings your prescriber gave you.