How Long Will the EcoFlow Delta Pro 3 Run a Box Fan?
Updated 2026-10-17 · Yes
The numbers
| Battery capacity | 4096Wh (LFP) |
|---|---|
| Usable energy | 3482Wh (85% via AC outlets) |
| Continuous AC output | 4000W |
| Surge rating | 8000W |
| Box fan running watts | 75W |
| Startup watts | 100W |
| Average draw | 75W |
| Estimated runtime | 46 hours |
| Energy per day of typical use | 600Wh |
4096Wh × 0.85 = 3482Wh usable ÷ 75W average = 46.4 hours
Station specs: source, checked 2026-10-17. See how we calculate runtime.
Adjust the numbers
Check the label on your box fan and enter its real wattage.
Recharging with solar
The EcoFlow Delta Pro 3 accepts up to 2600W of solar input. In real conditions that harvests about 9.8 kWh on a sunny day (5 peak-sun hours), or about 750Wh with one 200W panel.
Solar can keep up. A box fan uses about 600Wh a day at 8 hours of use, so with enough panels and good sun the EcoFlow Delta Pro 3 can run it indefinitely.
Tips
- A 20-inch box fan draws 50–100W depending on speed.
- You’ll still have about 3925W of AC capacity left for other devices at the same time, though they’ll share the same battery.
- The EcoFlow Delta Pro 3 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 box fan
| Power station | Capacity | Output | Runtime | Verdict |
|---|---|---|---|---|
| Goal Zero Yeti 1500X | 1516Wh | 2000W | 17 hours | Yes |
| Jackery Explorer 2000 Plus | 2042Wh | 3000W | 23 hours | Yes |
| EcoFlow Delta 2 Max | 2048Wh | 2400W | 23 hours | Yes |
| Anker SOLIX F2000 | 2048Wh | 2400W | 23 hours | Yes |
| Bluetti AC200L | 2048Wh | 2400W | 23 hours | Yes |
| Bluetti AC200MAX | 2048Wh | 2200W | 23 hours | Yes |
| EcoFlow Delta Pro | 3600Wh | 3600W | 41 hours | Yes |
| Anker SOLIX F3800 | 3840Wh | 6000W | 44 hours | Yes |
FAQ
Will the EcoFlow Delta Pro 3 run a box fan overnight?
Yes. Eight hours uses about 600Wh, roughly 17% of the EcoFlow Delta Pro 3’s usable capacity.
How long does the EcoFlow Delta Pro 3 take to recharge with solar?
With its maximum 2600W of solar input it refills in about 2.1 hours of strong sun. With a single 200W panel, expect about 5.5 sunny days (27 hours of full sun).