EcoFlow DELTA 3 Classic vs Vtoman FlashSpeed 1000

What is the difference?

The EcoFlow DELTA 3 Classic has 1.8 kW of power, a 1.02 kWh battery. The Vtoman FlashSpeed 1000 has 1 kW of power, 2 kW peak, a 828 Wh battery.

Both use LiFePO4 batteries.

The EcoFlow DELTA 3 Classic takes up to 500 W from solar, the Vtoman FlashSpeed 1000 takes up to 300 W from solar. The EcoFlow DELTA 3 Classic charges faster from panels.

Both have a 5-year warranty.

The Vtoman FlashSpeed 1000 can add extra batteries.

Specs side by side

	EcoFlow DELTA 3 Classic	Vtoman FlashSpeed 1000
Capacity (Wh)	1024	828
Continuous (W)	1800	1000
Peak (W)	—	2000
Solar input (W)	500	300
Chemistry	LiFePO4	LiFePO4
Cycles	—	3000
Expandable	—	yes
Weight (lb)	27	—
Warranty (yr)	5	5
Fridge run time	19.3 h	15.6 h
CPAP run time	23.2 h	18.7 h
Wi-Fi router run time	67.6 h	54.6 h
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Specs as read from manufacturer pages on 2026-10-25 / 2026-10-26. 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 Classic or Vtoman FlashSpeed 1000?

The EcoFlow DELTA 3 Classic. More capacity: 1024 Wh vs 828 Wh.

Which charges faster from solar, EcoFlow DELTA 3 Classic or Vtoman FlashSpeed 1000?

The EcoFlow DELTA 3 Classic. Faster solar charging: 500 W input vs 300 W input.

More comparisons

Compare other models → · All EcoFlow models · All Vtoman models