How many nights will the Goal Zero Yeti 500 run a CPAP with heated humidifier?

About 1 night of 8 hours (12 hours in total). A CPAP with heated humidifier averages about 34 W, and the 499 Wh battery gives about 424 Wh after inverter losses.

How much longer does it last without the heated humidifier?

With the heated humidifier on (about 34 W), about 1 night (12 hrs). Without it (about 7 W), about 7 nights (3 days). Turning the humidifier off is the easiest way to stretch a charge.

Is the Goal Zero Yeti 500 enough backup for a CPAP with heated humidifier?

Only as a short bridge. It covers about 1 night (12 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.

Goal Zero · Will it run?

Can the Goal Zero Yeti 500 run a CPAP with heated humidifier?

Published October 10, 2026

Short answerYes

Yes. The Goal Zero Yeti 500 runs a CPAP with heated humidifier for about 1 night (12 hours) from a full charge. At about 34 W on average it uses 8% of the battery an hour, and the 500 W output is far more than it needs.

Add your other devices

Key numbers

Nights per charge: 1 night; 12 hrs
Battery used per hour: 8%; 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

Goal Zero Yeti 500

Battery: 499 Wh; about 424 Wh usable
Output: 500 W; continuous
Surge: 1,000 W; start-up peak

How we worked it out: 499 Wh × 0.85 ÷ 34 W = about 12 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

Goal Zero Yeti 500

499 Wh · 500 W output · 1,000 W surge · 16.1 lb

Full specs and runtimes

Check price on Amazon Check price at Goal Zero

We may earn a commission if you buy through these links. It doesn’t change your price. How we make money

What else the Goal Zero Yeti 500 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 12 hours above is an estimate, not a measured result.

Common questions

How many nights will the Goal Zero Yeti 500 run a CPAP with heated humidifier?: About 1 night of 8 hours (12 hours in total). A CPAP with heated humidifier averages about 34 W, and the 499 Wh battery gives about 424 Wh after inverter losses.
How much longer does it last without the heated humidifier?: With the heated humidifier on (about 34 W), about 1 night (12 hrs). Without it (about 7 W), about 7 nights (3 days). Turning the humidifier off is the easiest way to stretch a charge.
Is the Goal Zero Yeti 500 enough backup for a CPAP with heated humidifier?: Only as a short bridge. It covers about 1 night (12 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.