EcoFlow DELTA 2 Max vs EcoFlow DELTA 3
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 $950 less. Whether that gap is worth closing depends on what you need to run.
- EcoFlow DELTA 2 Max holds 100% more energy (2048Wh vs 1024Wh), so it runs the same load proportionally longer.
- EcoFlow DELTA 2 Max has 1200W more surge headroom (4800W vs 3600W) — that decides whether a fridge, pump or AC compressor will actually start.
- EcoFlow DELTA 3 is 21.3 lb lighter (28.7 lb vs 50 lb).
- EcoFlow DELTA 3 is rated for 4,000 cycles vs 3,000 — meaningful if you cycle it daily.
The surge sleeper. At 4800W it starts loads that stations twice its price can't — and most spec sheets bury that number behind the X-Boost figure.
Best for: Home backup where something with a compressor — fridge, freezer, window AC — has to start reliably.
Where it falls short:
- 50 lb is heavy for its capacity
- Marketing leads with the 3400W X-Boost number, which understates it
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
| Spec | EcoFlow DELTA 2 Max | EcoFlow DELTA 3 |
|---|---|---|
| Price | $1599 | $649 |
| Capacity | 2048 Wh | 1024 Wh |
| Continuous output | 2400 W | 1800 W |
| Surge output | 4800 W | 3600 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 3,000 | 4,000 |
| Weight (lighter wins) | 50 lb | 28.7 lb |
| Max solar | 1000 W | 500 W |
| Recharge time (faster wins) | 1h 30m | 56 min |
Runtime head-to-head
| Appliance | EcoFlow DELTA 2 Max | EcoFlow DELTA 3 |
|---|---|---|
| Refrigerator | 29.0 hrs | 14.5 hrs |
| Mini fridge | 55.3 hrs | 27.6 hrs |
| Chest freezer | 21.8 hrs | 10.9 hrs |
| CPAP machine | 43.5 hrs | 21.8 hrs |
| Sump pump | 2.2 hrs | 1.1 hrs |