EcoFlow DELTA 3 Ultra Plus 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 $1600 less. Whether that gap is worth closing depends on what you need to run.
- EcoFlow DELTA 3 Ultra Plus holds 471% more energy (3072Wh vs 538Wh), so it runs the same load proportionally longer.
- EcoFlow DELTA 3 Ultra Plus has 6000W more surge headroom (7200W vs 1200W) — that decides whether a fridge, pump or AC compressor will actually start.
- Growatt VITA 550 is 67.9 lb lighter (17.6 lb vs 85.5 lb).
- EcoFlow DELTA 3 Ultra Plus is rated for 4,000 cycles vs 3,000 — meaningful if you cycle it daily.
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
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 Ultra Plus | Growatt VITA 550 |
|---|---|---|
| Price | $1999 | $399 |
| Capacity | 3072 Wh | 538 Wh |
| Continuous output | 3600 W | 600 W |
| Surge output | 7200 W | 1200 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 4,000 | 3,000 |
| Weight (lighter wins) | 85.5 lb | 17.6 lb |
| Max solar | 1600 W | 300 W |
| Recharge time (faster wins) | 1h 30m | 1h |
Runtime head-to-head
| Appliance | EcoFlow DELTA 3 Ultra Plus | Growatt VITA 550 |
|---|---|---|
| Refrigerator | 43.5 hrs | 7.6 hrs |
| Mini fridge | 82.9 hrs | 14.5 hrs |
| Chest freezer | 32.6 hrs | 5.7 hrs |
| CPAP machine | 65.3 hrs | 11.4 hrs |
| Sump pump | 3.3 hrs | ❌ |