Anker SOLIX C1000 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 July 29, 2026

The short answer

Anker SOLIX C1000 costs $800 less. Whether that gap is worth closing depends on what you need to run.

EcoFlow DELTA 3 Ultra holds 191% more energy (3072Wh vs 1056Wh), so it runs the same load proportionally longer.
EcoFlow DELTA 3 Ultra has 4800W more surge headroom (7200W vs 2400W) — that decides whether a fridge, pump or AC compressor will actually start.
Anker SOLIX C1000 is 55.4 lb lighter (28.44 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 C1000

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

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 C1000	EcoFlow DELTA 3 Ultra
Price	$999	$1799
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	83.8 lb
Max solar	600 W	800 W
Recharge time (faster wins)	58 min	1h 30m

Runtime head-to-head

Appliance	Anker SOLIX C1000	EcoFlow DELTA 3 Ultra
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

Anker SOLIX C1000
Price → EcoFlow DELTA 3 Ultra
Price →