How Long Will the EcoFlow Delta Pro 3 Run a Window AC (5,000 BTU)?
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 |
| Window AC (5,000 BTU) running watts | 450W |
| Startup watts | 1300W |
| Average draw | 315W |
| Estimated runtime | 11 hours |
| Energy per day of typical use | 2.5 kWh |
4096Wh × 0.85 = 3482Wh usable ÷ 315W average = 11.1 hours
Station specs: source, checked 2026-10-17. See how we calculate runtime.
Adjust the numbers
Check the label on your window AC (5,000 BTU) 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 window AC (5,000 BTU) uses about 2.5 kWh a day at 8 hours of use, so with enough panels and good sun the EcoFlow Delta Pro 3 can run it indefinitely.
Tips
- Small window units draw around 450W while the compressor runs. On hot days it rarely switches off, so expect 60–80% duty.
- You’ll still have about 3550W 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 window AC (5,000 BTU)
| Power station | Capacity | Output | Runtime | Verdict |
|---|---|---|---|---|
| Goal Zero Yeti 1500X | 1516Wh | 2000W | 4.1 hours | Yes |
| Jackery Explorer 2000 Plus | 2042Wh | 3000W | 5.5 hours | Yes |
| EcoFlow Delta 2 Max | 2048Wh | 2400W | 5.5 hours | Yes |
| Anker SOLIX F2000 | 2048Wh | 2400W | 5.5 hours | Yes |
| Bluetti AC200L | 2048Wh | 2400W | 5.5 hours | Yes |
| Bluetti AC200MAX | 2048Wh | 2200W | 5.5 hours | Yes |
| EcoFlow Delta Pro | 3600Wh | 3600W | 9.7 hours | Yes |
| Anker SOLIX F3800 | 3840Wh | 6000W | 10 hours | Yes |
FAQ
Will the EcoFlow Delta Pro 3 run a window AC (5,000 BTU) overnight?
Yes. Eight hours uses about 2520Wh, roughly 72% 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).