EcoFlow DELTA 3 Ultra Plus 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
Growatt INFINITY 1500 costs $900 less. Whether that gap is worth closing depends on what you need to run.
- EcoFlow DELTA 3 Ultra Plus holds 103% more energy (3072Wh vs 1512Wh), so it runs the same load proportionally longer.
- EcoFlow DELTA 3 Ultra Plus has 4200W more surge headroom (7200W vs 3000W) — that decides whether a fridge, pump or AC compressor will actually start.
- Growatt INFINITY 1500 is 48.0 lb lighter (37.5 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 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 Ultra Plus | Growatt INFINITY 1500 |
|---|---|---|
| Price | $1999 | $1099 |
| Capacity | 3072 Wh | 1512 Wh |
| Continuous output | 3600 W | 2000 W |
| Surge output | 7200 W | 3000 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 4,000 | 3,000 |
| Weight (lighter wins) | 85.5 lb | 37.5 lb |
| Max solar | 1600 W | 800 W |
| Recharge time (faster wins) | 1h 30m | 1h 50m |
Runtime head-to-head
| Appliance | EcoFlow DELTA 3 Ultra Plus | Growatt INFINITY 1500 |
|---|---|---|
| Refrigerator | 43.5 hrs | 21.4 hrs |
| Mini fridge | 82.9 hrs | 40.8 hrs |
| Chest freezer | 32.6 hrs | 16.1 hrs |
| CPAP machine | 65.3 hrs | 32.1 hrs |
| Sump pump | 3.3 hrs | ❌ |