EcoFlow DELTA 3 Ultra vs Segway Cube 1000
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
Segway Cube 1000 costs $1000 less. Whether that gap is worth closing depends on what you need to run.
- EcoFlow DELTA 3 Ultra holds 200% more energy (3072Wh vs 1024Wh), so it runs the same load proportionally longer.
- EcoFlow DELTA 3 Ultra has 2800W more surge headroom (7200W vs 4400W) — that decides whether a fridge, pump or AC compressor will actually start.
- Segway Cube 1000 is 55.4 lb lighter (28.4 lb vs 83.8 lb).
- EcoFlow DELTA 3 Ultra is rated for 4,000 cycles vs 3,000 — meaningful if you cycle it daily.
EcoFlow DELTA 3 Ultra
3kWh with 7200W surge at $1799 — this is whole-home territory at a mid-range price. The catch is the 800W solar input.
Best for: Grid-tied home backup where you recharge from the wall, not the sun.
Where it falls short:
- 800W solar input is low for 3kWh — slow off-grid refills
- 83.8 lb
Segway Cube 1000
Segway's stackable home unit brings a strong 2,200W output at 1kWh and a modular design, though the cube form factor is bulkier than flat rivals.
Best for: Buyers who want a stackable, expandable home system starting at 1kWh.
Where it falls short:
- Bulky cube shape
- 3-year warranty
| Spec | EcoFlow DELTA 3 Ultra | Segway Cube 1000 |
|---|---|---|
| Price | $1799 | $799 |
| Capacity | 3072 Wh | 1024 Wh |
| Continuous output | 3600 W | 2200 W |
| Surge output | 7200 W | 4400 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 4,000 | 3,000 |
| Weight (lighter wins) | 83.8 lb | 28.4 lb |
| Max solar | 800 W | 700 W |
| Recharge time (faster wins) | 1h 30m | 1h 20m |
Runtime head-to-head
| Appliance | EcoFlow DELTA 3 Ultra | Segway Cube 1000 |
|---|---|---|
| Refrigerator | 43.5 hrs | 14.5 hrs |
| Mini fridge | 82.9 hrs | 27.6 hrs |
| Chest freezer | 32.6 hrs | 10.9 hrs |
| CPAP machine | 65.3 hrs | 21.8 hrs |
| Sump pump | 3.3 hrs | 1.1 hrs |