How Long Will the Anker SOLIX C300 Run a CPAP with Humidifier?
Updated 2026-10-17 · Yes
Medical equipment: these are estimates. Test your own setup and keep a backup plan.
The numbers
| Battery capacity | 288Wh (LFP) |
|---|---|
| Usable energy | 245Wh (85% via AC outlets) |
| Continuous AC output | 300W |
| Surge rating | 600W |
| CPAP with humidifier running watts | 60W |
| Startup watts | 60W |
| Average draw | 60W |
| Estimated runtime | 4.1 hours |
| Energy per day of typical use | 480Wh |
288Wh × 0.85 = 245Wh usable ÷ 60W average = 4.1 hours
Station specs: source, checked 2026-10-17. See how we calculate runtime.
Adjust the numbers
Check the label on your CPAP with humidifier and enter its real wattage.
Recharging with solar
The Anker SOLIX C300 accepts up to 100W of solar input. In real conditions that harvests about 375Wh on a sunny day (5 peak-sun hours).
Solar can’t fully keep up. A CPAP with humidifier uses about 480Wh a day at 8 hours of use, more than the Anker SOLIX C300’s best-case solar harvest. Solar will stretch the runtime but not sustain it.
Tips
- The heated humidifier roughly doubles a CPAP's power draw. Turning it down or off is the easiest way to get more nights per charge.
- You’ll still have about 240W of AC capacity left for other devices at the same time, though they’ll share the same battery.
- The Anker SOLIX C300 uses LiFePO4 (LFP) cells, rated for thousands of cycles, so running it down daily won’t wear it out quickly.
Other power stations running a CPAP with humidifier
| Power station | Capacity | Output | Runtime | Verdict |
|---|---|---|---|---|
| EcoFlow River 3 | 245Wh | 300W | 3.5 hours | Yes |
| EcoFlow River 2 | 256Wh | 300W | 3.6 hours | Yes |
| Jackery Explorer 240 v2 | 256Wh | 300W | 3.6 hours | Yes |
| Bluetti EB3A | 268Wh | 600W | 3.8 hours | Yes |
| Jackery Explorer 300 Plus | 288Wh | 300W | 4.1 hours | Yes |
| Goal Zero Yeti 500X | 505Wh | 300W | 7.2 hours | Yes |
| EcoFlow River 2 Max | 512Wh | 500W | 7.3 hours | Yes |
| Anker 535 PowerHouse | 512Wh | 500W | 7.3 hours | Yes |
FAQ
Will the Anker SOLIX C300 run a CPAP with humidifier overnight?
No. At about 60W average it runs out after 4.1 hours. For a full night you need at least 600Wh of capacity.
How long does the Anker SOLIX C300 take to recharge with solar?
With its maximum 100W of solar input it refills in about 3.8 hours of strong sun. A single 200W panel is enough to max out its solar input.
Is the Anker SOLIX C300 safe for medical equipment?
These are estimates, not medical advice. Check your device’s actual power draw, test your setup before you rely on it, and always keep a backup plan approved by your doctor or equipment supplier.