EcoFlow DELTA 3 Max vs Growatt VITA 550
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
Growatt VITA 550 costs $700 less. Whether that gap is worth closing depends on what you need to run.
- EcoFlow DELTA 3 Max holds 281% more energy (2048Wh vs 538Wh), so it runs the same load proportionally longer.
- EcoFlow DELTA 3 Max has 3600W more surge headroom (4800W vs 1200W) — that decides whether a fridge, pump or AC compressor will actually start.
- Growatt VITA 550 is 37.5 lb lighter (17.6 lb vs 55.1 lb).
- EcoFlow DELTA 3 Max is rated for 4,000 cycles vs 3,000 — meaningful if you cycle it daily.
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
Growatt VITA 550
A tidy half-kWh unit with fast charging and a 1,200W surge that lets it start small appliances a 600W rating wouldn't suggest.
Best for: Campers who want fast charging and a bit of surge headroom at half a kWh.
Where it falls short:
- 538Wh is weekend-scale
- 3-year warranty
| Spec | EcoFlow DELTA 3 Max | Growatt VITA 550 |
|---|---|---|
| Price | $1099 | $399 |
| Capacity | 2048 Wh | 538 Wh |
| Continuous output | 2400 W | 600 W |
| Surge output | 4800 W | 1200 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 4,000 | 3,000 |
| Weight (lighter wins) | 55.1 lb | 17.6 lb |
| Max solar | 1000 W | 300 W |
| Recharge time (faster wins) | 1h 22m | 1h |
Runtime head-to-head
| Appliance | EcoFlow DELTA 3 Max | Growatt VITA 550 |
|---|---|---|
| Refrigerator | 29.0 hrs | 7.6 hrs |
| Mini fridge | 55.3 hrs | 14.5 hrs |
| Chest freezer | 21.8 hrs | 5.7 hrs |
| CPAP machine | 43.5 hrs | 11.4 hrs |
| Sump pump | 2.2 hrs | ❌ |