Anker SOLIX C800 vs EcoFlow DELTA 3 Ultra
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
Anker SOLIX C800 costs $1200 less. Whether that gap is worth closing depends on what you need to run.
- EcoFlow DELTA 3 Ultra holds 300% more energy (3072Wh vs 768Wh), so it runs the same load proportionally longer.
- EcoFlow DELTA 3 Ultra has 5600W more surge headroom (7200W vs 1600W) — that decides whether a fridge, pump or AC compressor will actually start.
- Anker SOLIX C800 is 58.9 lb lighter (24.9 lb vs 83.8 lb).
- EcoFlow DELTA 3 Ultra is rated for 4,000 cycles vs 3,000 — meaningful if you cycle it daily.
Anker SOLIX C800
The C1000's smaller sibling. Same fast-charging DNA at a lower price, but the 768Wh capacity puts it firmly in weekend-trip territory.
Best for: Campers and van-lifers powering electronics, lights and a mini fridge — not home backup.
Where it falls short:
- 300W solar input is low — slow to top off off-grid
- 1600W surge rules out most motor-driven appliances
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
| Spec | Anker SOLIX C800 | EcoFlow DELTA 3 Ultra |
|---|---|---|
| Price | $599 | $1799 |
| Capacity | 768 Wh | 3072 Wh |
| Continuous output | 1200 W | 3600 W |
| Surge output | 1600 W | 7200 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 3,000 | 4,000 |
| Weight (lighter wins) | 24.9 lb | 83.8 lb |
| Max solar | 300 W | 800 W |
| Recharge time (faster wins) | 58 min | 1h 30m |
Runtime head-to-head
| Appliance | Anker SOLIX C800 | EcoFlow DELTA 3 Ultra |
|---|---|---|
| Refrigerator | 10.9 hrs | 43.5 hrs |
| Mini fridge | 20.7 hrs | 82.9 hrs |
| Chest freezer | 8.2 hrs | 32.6 hrs |
| CPAP machine | 16.3 hrs | 65.3 hrs |
| Sump pump | ❌ | 3.3 hrs |