EcoFlow DELTA 2 Max vs EcoFlow DELTA 3 Max
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Our verdict
Both are 2,048 Wh EcoFlow stations with 2,400 W continuous output and 4,800 W surge, so the choice comes down to expansion versus portability. The DELTA 2 Max is the system builder: it takes up to 1,000 W of solar (twice the DELTA 3 Max’s 500 W) and expands to 6,144 Wh with extra batteries, which the standard DELTA 3 Max can’t do.
The DELTA 3 Max is 5 lb lighter (44.8 vs 50 lb) and has the lower list price ($1,199 vs $1,299). If you want a fixed 2 kWh backup you can move around, take the DELTA 3 Max. If you plan to add panels or batteries for longer outages, the DELTA 2 Max is the better long-term buy.
Based on manufacturer specs and list prices checked Oct 11, 2026.
Where the EcoFlow DELTA 2 Max wins
- Faster solar charging (1,000 vs 500 W input)
- Expandable to 6,144 Wh with extra batteries
Where the EcoFlow DELTA 3 Max wins
- Lighter (44.8 vs 50 lb)
Spec by spec
| Spec | EcoFlow DELTA 2 Max | EcoFlow DELTA 3 Max |
|---|---|---|
| Battery capacity | 2,048 Wh | 2,048 Wh |
| Continuous AC output | 2,400 W | 2,400 W |
| Surge / peak output | 4,800 W | 4,800 W |
| Battery chemistry | LiFePO4 | LiFePO4 |
| Rated charge cycles | 3,000 | 3,000 |
| Lifetime energy (capacity × cycles) | 6,144 kWh | 6,144 kWh |
| Weight | 50 lb | 44.8 lb (better) |
| Energy per pound | 41 Wh/lb | 45.7 Wh/lb (better) |
| AC outlets | 6 | — |
| Max USB-C output | 100 W | — |
| Max solar input | 1,000 W (better) | 500 W |
| Wall charge to 100% | — | — |
| Expandable to | 6,144 Wh (better) | Not expandable |
| List price at maker | $1,299 | $1,199 |
| Runs a full-size fridge | 33.2 h | 33.2 h |
| CPAP nights (40 W, 8 h) | 5 | 5 |
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