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Why this matters

CPAP machines typically draw 50–80W continuously — meaning an 8-hour night requires 400–640 Wh of energy. Any portable power station in the 500+ Wh range can handle a CPAP night, but some are better suited than others. The key considerations are: capacity (enough for 1–2 nights), output stability (CPAP machines are sensitive to voltage fluctuation), noise (the power station should be silent, since you're sleeping next to it), and indoor safety (no gas generators — carbon monoxide kills).

Our top picks

Best for CPAP

EcoFlow Delta 2

Capacity: 1024 Wh
Output: 1800W (pure sine wave)
CPAP nights: ~2 nights

The EcoFlow Delta 2 is the best CPAP battery backup because it provides pure sine wave output (critical for CPAP machine longevity), runs completely silent (no fan noise during normal CPAP loads), and has enough capacity for 2 full nights of CPAP use on a single charge. Recharges from a wall outlet in 50 minutes — perfect for power outage preparedness.

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Lightweight Pick

Goal Zero Yeti 300

Capacity: 297 Wh
Output: 350W
CPAP nights: ~1 night (with humidifier off)

The Goal Zero Yeti 300 is the lightest option for travel CPAP use. At under 8 lbs, it's easy to pack for hotel stays or camping trips where you need CPAP power but don't want to carry a 25 lb power station. Capacity is tight — one night with humidifier, two nights without.

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Smart Plug

TP-Link Kasa Smart Plug (Energy Monitoring)

Use: Measure your CPAP's exact Wh draw
Compatibility: All CPAP machines

Before buying any CPAP battery backup, plug your CPAP into one of these smart plugs for a night to measure the exact Wh consumption. CPAP power use varies dramatically based on pressure setting, humidifier use, and heated tube use — knowing your actual draw helps you size your backup correctly.

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