EcoFlow DELTA 3 Ultra vs Allpowers R1500
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
Allpowers R1500 costs $1100 less. Whether that gap is worth closing depends on what you need to run.
- EcoFlow DELTA 3 Ultra holds 167% more energy (3072Wh vs 1152Wh), so it runs the same load proportionally longer.
- EcoFlow DELTA 3 Ultra has 4200W more surge headroom (7200W vs 3000W) — that decides whether a fridge, pump or AC compressor will actually start.
- Allpowers R1500 is 46.3 lb lighter (37.5 lb vs 83.8 lb).
- EcoFlow DELTA 3 Ultra is rated for 4,000 cycles vs 3,500 — 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
Allpowers R1500
A well-priced 1.1kWh with a real 1,800W output and fast charging, a common budget pick for home backup starter kits.
Best for: First-time backup buyers who want 1,800W output cheap.
Where it falls short:
- 37.5 lb for 1.1kWh
- Not expandable
| Spec | EcoFlow DELTA 3 Ultra | Allpowers R1500 |
|---|---|---|
| Price | $1799 | $699 |
| Capacity | 3072 Wh | 1152 Wh |
| Continuous output | 3600 W | 1800 W |
| Surge output | 7200 W | 3000 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 4,000 | 3,500 |
| Weight (lighter wins) | 83.8 lb | 37.5 lb |
| Max solar | 800 W | 700 W |
| Recharge time (faster wins) | 1h 30m | 1h 20m |
Runtime head-to-head
| Appliance | EcoFlow DELTA 3 Ultra | Allpowers R1500 |
|---|---|---|
| Refrigerator | 43.5 hrs | 16.3 hrs |
| Mini fridge | 82.9 hrs | 31.1 hrs |
| Chest freezer | 32.6 hrs | 12.2 hrs |
| CPAP machine | 65.3 hrs | 24.5 hrs |
| Sump pump | 3.3 hrs | ❌ |