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

About 3 nights of 8 hours (26 hours in total). A CPAP with heated humidifier averages about 34 W, and the 1,024 Wh battery gives about 870 Wh after inverter losses.

How much longer does it last without the heated humidifier?

With the heated humidifier on (about 34 W), about 3 nights (26 hrs). Without it (about 7 W), about 15 nights (5 days). Turning the humidifier off is the easiest way to stretch a charge.

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

Only as a short bridge. It covers about 3 nights (26 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 DELTA 3 run a CPAP with heated humidifier?

Published October 10, 2026

Short answerYes

Yes. The EcoFlow DELTA 3 runs a CPAP with heated humidifier for about 3 nights (26 hours) from a full charge. At about 34 W on average it uses 3.9% of the battery an hour, and the 1,800 W output is far more than it needs.

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Key numbers

Nights per charge: 3 nights; 26 hrs
Battery used per hour: 3.9%; 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 DELTA 3

Battery: 1,024 Wh; about 870 Wh usable
Output: 1,800 W; continuous
Surge: 3,600 W; start-up peak

How we worked it out: 1,024 Wh × 0.85 ÷ 34 W = about 26 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 DELTA 3

1,024 Wh · 1,800 W output · 3,600 W surge · 27.6 lb

Full specs and runtimes

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What else the EcoFlow DELTA 3 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 26 hours above is an estimate, not a measured result.

Common questions

How many nights will the EcoFlow DELTA 3 run a CPAP with heated humidifier?: About 3 nights of 8 hours (26 hours in total). A CPAP with heated humidifier averages about 34 W, and the 1,024 Wh battery gives about 870 Wh after inverter losses.
How much longer does it last without the heated humidifier?: With the heated humidifier on (about 34 W), about 3 nights (26 hrs). Without it (about 7 W), about 15 nights (5 days). Turning the humidifier off is the easiest way to stretch a charge.
Is the EcoFlow DELTA 3 enough backup for a CPAP with heated humidifier?: Only as a short bridge. It covers about 3 nights (26 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.