CPAP DC Battery Power Supply (edited)

I have a CPAP that runs on DC 24V 3.75A- can I use a battery setup that provides DC 24V 14Ah without damaging the CPAP?

by mikeschmid52
May 02, 2020

590 previously asked questions is a bit much to browse

by mikeschmid52
May 02, 2020

1 Answer

Answer by dhaans

The voltage is okay, and assuming a sealed lead-acid battery, amps are fine, but the watt-hours -- not so much.

Battery: 24v*14Ah=336 watt hours

Load: 24v*3.75A = 90W

Under optimal conditions: CPAP can run for 336Wh/90W=3.733 hours

Not quite a full night's sleep.

+1 vote
by dhaans
May 17, 2020

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