How Long Will the EcoFlow Delta 3 Max Run a CPAP Machine?
Updated 2026-10-17 · Yes
Medical equipment: these are estimates. Test your own setup and keep a backup plan.
The numbers
| Battery capacity | 2048Wh (LFP) |
|---|---|
| Usable energy | 1884Wh (92% via 12V/USB DC output) |
| Continuous AC output | 2400W |
| Surge rating | 3600W |
| CPAP machine running watts | 30W |
| Startup watts | 30W |
| Average draw | 30W |
| Estimated runtime | 2.6 days |
| Energy per day of typical use | 240Wh |
2048Wh × 0.92 = 1884Wh usable ÷ 30W average = 62.8 hours
Station specs: source, checked 2026-10-17. See how we calculate runtime.
Adjust the numbers
Check the label on your CPAP machine and enter its real wattage.
Recharging with solar
The EcoFlow Delta 3 Max accepts up to 500W of solar input. In real conditions that harvests about 1.9 kWh on a sunny day (5 peak-sun hours), or about 750Wh with one 200W panel.
Solar can keep up. A CPAP machine uses about 240Wh a day at 8 hours of use, so with enough panels and good sun the EcoFlow Delta 3 Max can run it indefinitely.
Tips
- Figures assume the humidifier and heated tube are off. Running a CPAP from its 12V/DC adapter instead of the AC outlet stretches runtime noticeably.
- Running it from the EcoFlow Delta 3 Max’s DC port instead of the AC outlet avoids inverter losses: about 143Wh more usable energy.
- The EcoFlow Delta 3 Max 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 machine
| Power station | Capacity | Output | Runtime | Verdict |
|---|---|---|---|---|
| Goal Zero Yeti 1500X | 1516Wh | 2000W | 46 hours | Yes |
| Jackery Explorer 1500 v2 | 1536Wh | 2000W | 47 hours | Yes |
| Jackery Explorer 2000 Plus | 2042Wh | 3000W | 2.6 days | Yes |
| EcoFlow Delta 2 Max | 2048Wh | 2400W | 2.6 days | Yes |
| Anker SOLIX F2000 | 2048Wh | 2400W | 2.6 days | Yes |
| Bluetti AC200L | 2048Wh | 2400W | 2.6 days | Yes |
| Bluetti AC200MAX | 2048Wh | 2200W | 2.6 days | Yes |
| Bluetti Elite 200 V2 | 2073Wh | 2600W | 2.6 days | Yes |
FAQ
Will the EcoFlow Delta 3 Max run a CPAP machine overnight?
Yes. Eight hours uses about 240Wh, roughly 13% of the EcoFlow Delta 3 Max’s usable capacity.
How long does the EcoFlow Delta 3 Max take to recharge with solar?
With its maximum 500W of solar input it refills in about 5.5 hours of strong sun. With a single 200W panel, expect about 2.7 sunny days (14 hours of full sun).
Is the EcoFlow Delta 3 Max 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.