Allpowers S2000 Pro vs Vtoman FlashSpeed 1500

What is the difference?

The Allpowers S2000 Pro has 2.4 kW of power, 4 kW peak, a 1.45 kWh battery. The Vtoman FlashSpeed 1500 has 1.5 kW of power, 3 kW peak, a 1.55 kWh battery.

The Allpowers S2000 Pro uses a lithium-ion (NMC) battery, the Vtoman FlashSpeed 1500 a LiFePO4 one. LiFePO4 generally lasts more charge cycles, so the Vtoman FlashSpeed 1500 should last longer.

The Allpowers S2000 Pro is rated for 2500 cycles, the Vtoman FlashSpeed 1500 is rated for 3000 cycles.

The Allpowers S2000 Pro weighs 29 lb, the Vtoman FlashSpeed 1500 weighs 41 lb. The Allpowers S2000 Pro is easier to carry.

Both have a 5-year warranty.

Both have 120 V AC output.

The Vtoman FlashSpeed 1500 can add extra batteries.

Specs side by side

	Allpowers S2000 Pro	Vtoman FlashSpeed 1500
Capacity (Wh)	1451	1548
Continuous (W)	2400	1500
Peak (W)	4000	3000
Solar input (W)	1000	—
Chemistry	NMC	LiFePO4
Cycles	2500	3000
Expandable	—	yes
Weight (lb)	29	41
Warranty (yr)	5	5
Fridge run time	27.4 h	29.2 h
CPAP run time	32.8 h	35 h
Wi-Fi router run time	95.8 h	102.2 h
	Check on Amazon →	Check on Amazon →

Specs as read from manufacturer pages on 2026-10-31 / 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, Allpowers S2000 Pro or Vtoman FlashSpeed 1500?

The Vtoman FlashSpeed 1500. More capacity: 1548 Wh vs 1451 Wh.

Which is lighter, Allpowers S2000 Pro or Vtoman FlashSpeed 1500?

The Allpowers S2000 Pro. Lighter: 29 lb vs 41 lb.

More comparisons

Compare other models → · All Allpowers models · All Vtoman models