How Long Will the EcoFlow Delta 3 Max Run a Window AC (8,000 BTU)?
Updated 2026-10-17 · Yes
The numbers
| Battery capacity | 2048Wh (LFP) |
|---|---|
| Usable energy | 1741Wh (85% via AC outlets) |
| Continuous AC output | 2400W |
| Surge rating | 3600W |
| Window AC (8,000 BTU) running watts | 700W |
| Startup watts | 2000W |
| Average draw | 490W |
| Estimated runtime | 3.6 hours |
| Energy per day of typical use | 3.9 kWh |
2048Wh × 0.85 = 1741Wh usable ÷ 490W average = 3.6 hours
Station specs: source, checked 2026-10-17. See how we calculate runtime.
Adjust the numbers
Check the label on your window AC (8,000 BTU) 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’t fully keep up. A window AC (8,000 BTU) uses about 3.9 kWh a day at 8 hours of use, more than the EcoFlow Delta 3 Max’s best-case solar harvest. Solar will stretch the runtime but not sustain it.
Tips
- Mid-size window units need a stout inverter to survive the compressor start.
- You’ll still have about 1700W of AC capacity left for other devices at the same time, though they’ll share the same battery.
- 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 window AC (8,000 BTU)
| Power station | Capacity | Output | Runtime | Verdict |
|---|---|---|---|---|
| Goal Zero Yeti 1500X | 1516Wh | 2000W | 2.6 hours | Yes |
| Jackery Explorer 1500 v2 | 1536Wh | 2000W | 2.7 hours | Yes |
| Jackery Explorer 2000 Plus | 2042Wh | 3000W | 3.5 hours | Yes |
| EcoFlow Delta 2 Max | 2048Wh | 2400W | 3.6 hours | Yes |
| Anker SOLIX F2000 | 2048Wh | 2400W | 3.6 hours | Yes |
| Bluetti AC200L | 2048Wh | 2400W | 3.6 hours | Yes |
| Bluetti AC200MAX | 2048Wh | 2200W | 3.6 hours | Yes |
| Bluetti Elite 200 V2 | 2073Wh | 2600W | 3.6 hours | Yes |
FAQ
Will the EcoFlow Delta 3 Max run a window AC (8,000 BTU) overnight?
No. At about 490W average it runs out after 3.6 hours. For a full night you need at least 4700Wh of 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).