Anker SOLIX C1000 vs EcoFlow DELTA 3 Ultra Plus
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 C1000 costs $1000 less. Whether that gap is worth closing depends on what you need to run.
- EcoFlow DELTA 3 Ultra Plus holds 191% more energy (3072Wh vs 1056Wh), so it runs the same load proportionally longer.
- EcoFlow DELTA 3 Ultra Plus has 4800W more surge headroom (7200W vs 2400W) — that decides whether a fridge, pump or AC compressor will actually start.
- Anker SOLIX C1000 is 57.1 lb lighter (28.44 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.
The default recommendation for most people. It clears the 1kWh bar, recharges in under an hour, and undercuts almost everything with comparable specs.
Best for: First-time buyers who want one unit for camping and short outages without overpaying.
Where it falls short:
- 2400W surge won't start a sump pump or well pump
- Only 1056Wh — a fridge-plus-devices outage tops out around a day
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
| Spec | Anker SOLIX C1000 | EcoFlow DELTA 3 Ultra Plus |
|---|---|---|
| Price | $999 | $1999 |
| Capacity | 1056 Wh | 3072 Wh |
| Continuous output | 1800 W | 3600 W |
| Surge output | 2400 W | 7200 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 3,000 | 4,000 |
| Weight (lighter wins) | 28.44 lb | 85.5 lb |
| Max solar | 600 W | 1600 W |
| Recharge time (faster wins) | 58 min | 1h 30m |
Runtime head-to-head
| Appliance | Anker SOLIX C1000 | EcoFlow DELTA 3 Ultra Plus |
|---|---|---|
| Refrigerator | 15.0 hrs | 43.5 hrs |
| Mini fridge | 28.5 hrs | 82.9 hrs |
| Chest freezer | 11.2 hrs | 32.6 hrs |
| CPAP machine | 22.4 hrs | 65.3 hrs |
| Sump pump | ❌ | 3.3 hrs |