1. Anker SOLIX C2000 Gen2
8.6
/ 10
2kWh runs a CPAP (humidifier off) for well over a week of nights, silently, at your bedside. This is the right tool — not a generator.
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~$1,099 typical price
Buy on AmazonUse-case guide · 2026
Best generator for a CPAP Machine
For CPAP users, a power outage isn't an inconvenience — it's a medical problem at 2 AM. The good news is that CPAPs are tiny loads (30–90W), which makes silent battery power the perfect solution: no noise outside your window, no midnight refueling, no carbon monoxide anywhere near a sleeping household.
The power requirements
Running watts
30–60W (CPAP alone) / 100–200W (with heated humidifier)
Starting surge
No meaningful surge
- ▸Turning off the heated humidifier and tube heat cuts draw by 60–70% and multiplies battery runtime.
- ▸Clean sine-wave power is required — every battery station and inverter generator we recommend provides it; cheap open-frame generators may not.
Adding more appliances? Run your full load through the sizing calculator →
Our picks
Same multi-night capacity with the category's best interface, and the expansion path covers households where the CPAP shares the battery with the fridge.
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~$1,799 typical price
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3. Honda EU2200i
9.5
/ 10
When an outage runs past what batteries hold, the quietest generator made recharges the battery bank by day while disturbing the neighborhood as little as possible.
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~$1,099 typical price
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- ▸Never run any fuel generator near a sleeping household's windows — CO risk is highest exactly when everyone's asleep. Battery inside, generator (if needed) 20+ feet out, exhaust away.
- ▸Many CPAPs have DC input; using the manufacturer's 12V cable from a battery station's DC port is meaningfully more efficient than going through AC.
- ▸Tell your power utility you have medical equipment — many maintain priority-restoration and outage-alert lists.
Frequently asked questions
How many nights will a battery station run a CPAP?
With the humidifier off, a CPAP draws roughly 30–60W — call it 300–500Wh per 8-hour night. A 2,000Wh station covers 4–6 nights; with heated humidification, expect 1–2 nights.
Do I need a pure sine wave power source for a CPAP?
Yes. CPAP power supplies want clean sine-wave AC (or native DC input). All battery power stations and inverter generators qualify; older open-frame generators may not.