EcoFlow DELTA 3 Max vs EcoFlow DELTA 3 Ultra Plus
Side-by-side on the specs that decide it — surge, capacity, runtime and price.
Both models' specs verified against manufacturer listings · Last updated
The short answer
EcoFlow DELTA 3 Max costs $900 less. Whether that gap is worth closing depends on what you need to run.
- EcoFlow DELTA 3 Ultra Plus holds 50% more energy (3072Wh vs 2048Wh), so it runs the same load proportionally longer.
- EcoFlow DELTA 3 Ultra Plus has 2400W more surge headroom (7200W vs 4800W) — that decides whether a fridge, pump or AC compressor will actually start.
- EcoFlow DELTA 3 Max is 30.4 lb lighter (55.1 lb vs 85.5 lb).
EcoFlow DELTA 3 Max
The value leader in the 2kWh class. Same 4800W surge as the DELTA 2 Max at $500 less, with 1000 more cycles.
Best for: Home backup buyers who want compressor-starting surge without paying flagship prices.
Where it falls short:
- 55 lb is a two-hand lift
- Only marginally lighter than heavier rivals
EcoFlow DELTA 3 Ultra Plus
The Ultra's solar problem solved: same everything, but 1600W of PV input instead of 800W. That doubles your off-grid refill speed for $200.
Best for: Off-grid cabins and van builds that actually recharge from panels.
Where it falls short:
- $1999 approaches DELTA Pro 3 pricing
- 85.5 lb
| Spec | EcoFlow DELTA 3 Max | EcoFlow DELTA 3 Ultra Plus |
|---|---|---|
| Price | $1099 | $1999 |
| Capacity | 2048 Wh | 3072 Wh |
| Continuous output | 2400 W | 3600 W |
| Surge output | 4800 W | 7200 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 4,000 | 4,000 |
| Weight (lighter wins) | 55.1 lb | 85.5 lb |
| Max solar | 1000 W | 1600 W |
| Recharge time (faster wins) | 1h 22m | 1h 30m |
Runtime head-to-head
| Appliance | EcoFlow DELTA 3 Max | EcoFlow DELTA 3 Ultra Plus |
|---|---|---|
| Refrigerator | 29.0 hrs | 43.5 hrs |
| Mini fridge | 55.3 hrs | 82.9 hrs |
| Chest freezer | 21.8 hrs | 32.6 hrs |
| CPAP machine | 43.5 hrs | 65.3 hrs |
| Sump pump | 2.2 hrs | 3.3 hrs |