EcoFlow DELTA mini 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 $200 less. Whether that gap is worth closing depends on what you need to run.
- EcoFlow DELTA mini holds 64% more energy (882Wh vs 538Wh), so it runs the same load proportionally longer.
- EcoFlow DELTA mini has 900W more surge headroom (2100W vs 1200W) — that decides whether a fridge, pump or AC compressor will actually start.
- Growatt VITA 550 is 6.0 lb lighter (17.6 lb vs 23.6 lb).
- Growatt VITA 550 uses LiFePO4 while the other uses NMC — roughly double the usable cycle life.
- Growatt VITA 550 is rated for 3,000 cycles vs 800 — meaningful if you cycle it daily.
If you plan to cycle the battery daily, think twice about the EcoFlow DELTA mini. 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.
A compact NMC unit with a surprisingly strong 1,400W output for its size — but the 800-cycle battery means it won't age like the LiFePO4 field.
Best for: Buyers who want strong output in a light unit and won’t cycle it daily.
Where it falls short:
- NMC — ~800 cycles
- 2-year warranty, 300W solar input
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 mini | Growatt VITA 550 |
|---|---|---|
| Price | $599 | $399 |
| Capacity | 882 Wh | 538 Wh |
| Continuous output | 1400 W | 600 W |
| Surge output | 2100 W | 1200 W |
| Battery | NMC | LiFePO4 |
| Rated cycles | 800 | 3,000 |
| Weight (lighter wins) | 23.6 lb | 17.6 lb |
| Max solar | 300 W | 300 W |
| Recharge time (faster wins) | 1h 36m | 1h |
Runtime head-to-head
| Appliance | EcoFlow DELTA mini | Growatt VITA 550 |
|---|---|---|
| Refrigerator | 12.5 hrs | 7.6 hrs |
| Mini fridge | 23.8 hrs | 14.5 hrs |
| Chest freezer | 9.4 hrs | 5.7 hrs |
| CPAP machine | 18.7 hrs | 11.4 hrs |
| Sump pump | ❌ | ❌ |