EcoFlow DELTA 3 vs EcoFlow DELTA 3 Ultra
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 costs $1150 less. Whether that gap is worth closing depends on what you need to run.
- EcoFlow DELTA 3 Ultra holds 200% more energy (3072Wh vs 1024Wh), so it runs the same load proportionally longer.
- EcoFlow DELTA 3 Ultra has 3600W more surge headroom (7200W vs 3600W) — that decides whether a fridge, pump or AC compressor will actually start.
- EcoFlow DELTA 3 is 55.1 lb lighter (28.7 lb vs 83.8 lb).
EcoFlow DELTA 3
The 1kWh class got a serious upgrade here. 3600W surge at $649 beats the older DELTA 2 on every axis that matters.
Best for: Anyone about to buy a DELTA 2 — this is the same money for materially better specs.
Where it falls short:
- Still only 1024Wh
- Solar input unchanged at 500W
EcoFlow DELTA 3 Ultra
3kWh with 7200W surge at $1799 — this is whole-home territory at a mid-range price. The catch is the 800W solar input.
Best for: Grid-tied home backup where you recharge from the wall, not the sun.
Where it falls short:
- 800W solar input is low for 3kWh — slow off-grid refills
- 83.8 lb
| Spec | EcoFlow DELTA 3 | EcoFlow DELTA 3 Ultra |
|---|---|---|
| Price | $649 | $1799 |
| Capacity | 1024 Wh | 3072 Wh |
| Continuous output | 1800 W | 3600 W |
| Surge output | 3600 W | 7200 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 4,000 | 4,000 |
| Weight (lighter wins) | 28.7 lb | 83.8 lb |
| Max solar | 500 W | 800 W |
| Recharge time (faster wins) | 56 min | 1h 30m |
Runtime head-to-head
| Appliance | EcoFlow DELTA 3 | EcoFlow DELTA 3 Ultra |
|---|---|---|
| Refrigerator | 14.5 hrs | 43.5 hrs |
| Mini fridge | 27.6 hrs | 82.9 hrs |
| Chest freezer | 10.9 hrs | 32.6 hrs |
| CPAP machine | 21.8 hrs | 65.3 hrs |
| Sump pump | 1.1 hrs | 3.3 hrs |