EcoFlow
DELTA Pro 3
As of July 23, 2026, the EcoFlow DELTA Pro 3 delivered 3,790 Wh in OutdoorGearLab's testing, 93% of its 4,096 Wh rating, or $0.74 per usable Wh at $2,799.
Usable Wh (measured)
3,790
93% of the 4,096 Wh box rating
$ per usable Wh
$0.74
Price
$2,799
Out of stockEcoFlow store, Nov 13, 2026; sale price, sold out
Specs
| Usable Wh (measured) | 3,790 |
|---|---|
| Rated (box) Wh | 4,096 |
| Rated AC output | 4,000 W |
| Weight | 114.1 lb |
| Chemistry | LiFePO4 |
| Price | $2,799 (EcoFlow store, Nov 13, 2026; sale price, sold out) |
| $ per usable Wh | $0.74 |
Where the usable Wh comes from
OutdoorGearLab, updated July 23, 2026.
Measured AC energy output from 100% charge to empty at ~80% of rated max wattage (light-bar load).