EcoFlow DELTA 3 Ultra vs Fossibot F3600 Pro

What is the difference?

The EcoFlow DELTA 3 Ultra has 3.6 kW of power, 7.2 kW peak, a 3.07 kWh battery. The Fossibot F3600 Pro has 3.6 kW of power, 7.2 kW peak, a 3.84 kWh battery.

Both use LiFePO4 batteries.

The EcoFlow DELTA 3 Ultra takes up to 800 W from solar, the Fossibot F3600 Pro takes up to 2000 W from solar. The Fossibot F3600 Pro charges faster from panels.

Both have a 5-year warranty.

Both have 120 V AC output.

The Fossibot F3600 Pro can add extra batteries.

Specs side by side

	EcoFlow DELTA 3 Ultra	Fossibot F3600 Pro
Capacity (Wh)	3072	3840
Continuous (W)	3600	3600
Peak (W)	7200	7200
Solar input (W)	800	2000
Chemistry	LiFePO4	LiFePO4
Cycles	—	—
Expandable	—	yes
Weight (lb)	72	—
Warranty (yr)	5	5
Fridge run time	57.9 h	72.4 h
CPAP run time	69.5 h	86.9 h
Wi-Fi router run time	202.8 h	253.4 h
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Specs as read from manufacturer pages on 2026-10-26 / 2026-10-27. Specs one maker does not list are left out of the comparison. Run times are for that appliance alone with a typical duty cycle, after inverter and depth-of-discharge losses. Sponsored links; we may earn a commission.

Common questions

Which has more capacity, EcoFlow DELTA 3 Ultra or Fossibot F3600 Pro?

The Fossibot F3600 Pro. More capacity: 3840 Wh vs 3072 Wh.

Which charges faster from solar, EcoFlow DELTA 3 Ultra or Fossibot F3600 Pro?

The Fossibot F3600 Pro. Faster solar charging: 2000 W input vs 800 W input.

More comparisons

Compare other models → · All EcoFlow models · All Fossibot models