EcoFlow DELTA 1300 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 $600 less. Whether that gap is worth closing depends on what you need to run.
- EcoFlow DELTA 1300 holds 134% more energy (1260Wh vs 538Wh), so it runs the same load proportionally longer.
- EcoFlow DELTA 1300 has 2100W more surge headroom (3300W vs 1200W) — that decides whether a fridge, pump or AC compressor will actually start.
- Growatt VITA 550 is 13.3 lb lighter (17.6 lb vs 30.9 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 1300. 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.
The original DELTA that put EcoFlow on the map. Fast-charging and high-surge for its day, but the NMC battery and lack of USB-C now show its age.
Best for: Bargain hunters who find it heavily discounted.
Where it falls short:
- NMC — ~800 cycles
- No USB-C PD
- 2-year warranty
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 1300 | Growatt VITA 550 |
|---|---|---|
| Price | $999 | $399 |
| Capacity | 1260 Wh | 538 Wh |
| Continuous output | 1800 W | 600 W |
| Surge output | 3300 W | 1200 W |
| Battery | NMC | LiFePO4 |
| Rated cycles | 800 | 3,000 |
| Weight (lighter wins) | 30.9 lb | 17.6 lb |
| Max solar | 400 W | 300 W |
| Recharge time (faster wins) | 1h 36m | 1h |
Runtime head-to-head
| Appliance | EcoFlow DELTA 1300 | Growatt VITA 550 |
|---|---|---|
| Refrigerator | 17.9 hrs | 7.6 hrs |
| Mini fridge | 34.0 hrs | 14.5 hrs |
| Chest freezer | 13.4 hrs | 5.7 hrs |
| CPAP machine | 26.8 hrs | 11.4 hrs |
| Sump pump | ❌ | ❌ |