EcoFlow DELTA 3 Ultra vs EcoFlow DELTA Max 2000
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 Max 2000 costs $700 less. Whether that gap is worth closing depends on what you need to run.
- EcoFlow DELTA 3 Ultra holds 52% more energy (3072Wh vs 2016Wh), so it runs the same load proportionally longer.
- EcoFlow DELTA 3 Ultra has 3800W more surge headroom (7200W vs 3400W) — that decides whether a fridge, pump or AC compressor will actually start.
- EcoFlow DELTA Max 2000 is 35.8 lb lighter (48 lb vs 83.8 lb).
- EcoFlow DELTA 3 Ultra uses LiFePO4 while the other uses NMC — roughly double the usable cycle life.
- EcoFlow DELTA 3 Ultra is rated for 4,000 cycles vs 800 — meaningful if you cycle it daily.
If you plan to cycle the battery daily, think twice about the EcoFlow DELTA Max 2000. Its NMC cells are rated for 800 cycles against the LiFePO4 rival's longer life — over years of regular use that's the more expensive unit, whatever the sticker says.
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
The previous-generation 2kWh EcoFlow. Still capable and expandable, but its NMC cells and 800-cycle rating are a real step below the LiFePO4 DELTA 3 that replaced it.
Best for: Only at a steep discount against the DELTA 3 Max.
Where it falls short:
- NMC — roughly 800 cycles vs 4,000 for the DELTA 3 Max
- 2-year warranty
| Spec | EcoFlow DELTA 3 Ultra | EcoFlow DELTA Max 2000 |
|---|---|---|
| Price | $1799 | $1099 |
| Capacity | 3072 Wh | 2016 Wh |
| Continuous output | 3600 W | 2400 W |
| Surge output | 7200 W | 3400 W |
| Battery | LiFePO4 | NMC |
| Rated cycles | 4,000 | 800 |
| Weight (lighter wins) | 83.8 lb | 48 lb |
| Max solar | 800 W | 800 W |
| Recharge time (faster wins) | 1h 30m | 1h 48m |
Runtime head-to-head
| Appliance | EcoFlow DELTA 3 Ultra | EcoFlow DELTA Max 2000 |
|---|---|---|
| Refrigerator | 43.5 hrs | 28.6 hrs |
| Mini fridge | 82.9 hrs | 54.4 hrs |
| Chest freezer | 32.6 hrs | 21.4 hrs |
| CPAP machine | 65.3 hrs | 42.8 hrs |
| Sump pump | 3.3 hrs | 2.1 hrs |