How many nights will the EcoFlow DELTA Pro 3 run a CPAP without a humidifier?

About 62 nights of 8 hours (497 hours in total). A CPAP without a humidifier averages about 7 W, and the 4,096 Wh battery gives about 3,482 Wh after inverter losses.

How long does it last with a heated humidifier?

With the heated humidifier on (about 34 W), about 12 nights (4 days). Without it (about 7 W), about 62 nights (21 days). Turning the humidifier off is the easiest way to stretch a charge.

Is the EcoFlow DELTA Pro 3 enough backup for a CPAP without a humidifier?

Only as a short bridge. It covers about 62 nights (497 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 Pro 3 run a CPAP (no humidifier)?

Published October 11, 2026

Short answerYes

Yes. The EcoFlow DELTA Pro 3 runs a CPAP without a humidifier for about 62 nights (497 hours) from a full charge. At about 7 W on average it uses 0.2% of the battery an hour, and the 4,000 W output is far more than it needs.

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Key numbers

Nights per charge: 62 nights; 21 days
Battery used per hour: 0.2%; 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 DELTA Pro 3

Battery: 4,096 Wh; about 3,482 Wh usable
Output: 4,000 W; continuous
Surge: 8,000 W; start-up peak

How we worked it out: 4,096 Wh × 0.85 ÷ 7 W = about 21 days (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 Pro 3

4,096 Wh · 4,000 W output · 8,000 W surge · 113.5 lb

Full specs and runtimes

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What else the EcoFlow DELTA Pro 3 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 21 days above is an estimate, not a measured result.

Common questions

How many nights will the EcoFlow DELTA Pro 3 run a CPAP without a humidifier?: About 62 nights of 8 hours (497 hours in total). A CPAP without a humidifier averages about 7 W, and the 4,096 Wh battery gives about 3,482 Wh after inverter losses.
How long does it last with a heated humidifier?: With the heated humidifier on (about 34 W), about 12 nights (4 days). Without it (about 7 W), about 62 nights (21 days). Turning the humidifier off is the easiest way to stretch a charge.
Is the EcoFlow DELTA Pro 3 enough backup for a CPAP without a humidifier?: Only as a short bridge. It covers about 62 nights (497 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.