EcoFlow DELTA 3 vs Growatt INFINITY 1500
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 $450 less. Whether that gap is worth closing depends on what you need to run.
- Growatt INFINITY 1500 holds 48% more energy (1512Wh vs 1024Wh), so it runs the same load proportionally longer.
- EcoFlow DELTA 3 has 600W more surge headroom (3600W vs 3000W) — that decides whether a fridge, pump or AC compressor will actually start.
- EcoFlow DELTA 3 is 8.8 lb lighter (28.7 lb vs 37.5 lb).
- EcoFlow DELTA 3 is rated for 4,000 cycles vs 3,000 — meaningful if you cycle it daily.
EcoFlow DELTA 3
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
Growatt INFINITY 1500
A capable mid-size that flies under the radar. Solid 2,000W output and fast charging, let down mainly by a shorter warranty than the big brands.
Best for: Value hunters who want 1.5kWh and don't need the longest warranty.
Where it falls short:
- 3,000W surge is modest for the output
- 3-year warranty vs 5 from the majors
| Spec | EcoFlow DELTA 3 | Growatt INFINITY 1500 |
|---|---|---|
| Price | $649 | $1099 |
| Capacity | 1024 Wh | 1512 Wh |
| Continuous output | 1800 W | 2000 W |
| Surge output | 3600 W | 3000 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 4,000 | 3,000 |
| Weight (lighter wins) | 28.7 lb | 37.5 lb |
| Max solar | 500 W | 800 W |
| Recharge time (faster wins) | 56 min | 1h 50m |
Runtime head-to-head
| Appliance | EcoFlow DELTA 3 | Growatt INFINITY 1500 |
|---|---|---|
| Refrigerator | 14.5 hrs | 21.4 hrs |
| Mini fridge | 27.6 hrs | 40.8 hrs |
| Chest freezer | 10.9 hrs | 16.1 hrs |
| CPAP machine | 21.8 hrs | 32.1 hrs |
| Sump pump | 1.1 hrs | ❌ |