How many nights will the EcoFlow RIVER 3 Plus run a CPAP without a humidifier?

About 4 nights of 8 hours (35 hours in total). A CPAP without a humidifier averages about 7 W, and the 286 Wh battery gives about 243 Wh after inverter losses.

How long does it last with a 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 without a humidifier?

Only as a short bridge. It covers about 4 nights (35 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 (no humidifier)?

Published October 10, 2026

Short answerYes

Yes. The EcoFlow RIVER 3 Plus runs a CPAP without a humidifier for about 4 nights (35 hours) from a full charge. At about 7 W on average it uses 2.9% 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: 4 nights; 35 hrs
Battery used per hour: 2.9%; at 7 W average

CPAP (no humidifier)

Running: 7 W; 5–15 W range
Start-up: 10 W
Average: 7 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 ÷ 7 W = about 35 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 without a humidifier

The nearest sizes that also run it.

Keep going

Real runtime depends on the model you own, room temperature and battery age. The 35 hours above is an estimate, not a measured result.

Common questions

How many nights will the EcoFlow RIVER 3 Plus run a CPAP without a humidifier?: About 4 nights of 8 hours (35 hours in total). A CPAP without a humidifier averages about 7 W, and the 286 Wh battery gives about 243 Wh after inverter losses.
How long does it last with a 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 without a humidifier?: Only as a short bridge. It covers about 4 nights (35 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.