EcoFlow DELTA 3 Max vs Vtoman FlashSpeed 1500
What is the difference?
The EcoFlow DELTA 3 Max has 2.4 kW of power, 3.4 kW peak, a 2.05 kWh battery. The Vtoman FlashSpeed 1500 has 1.5 kW of power, 3 kW peak, a 1.55 kWh battery.
Both use LiFePO4 batteries.
The EcoFlow DELTA 3 Max weighs 45 lb, the Vtoman FlashSpeed 1500 weighs 41 lb. The Vtoman FlashSpeed 1500 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
| EcoFlow DELTA 3 Max | Vtoman FlashSpeed 1500 | |
|---|---|---|
| Capacity (Wh) | 2048 | 1548 |
| Continuous (W) | 2400 | 1500 |
| Peak (W) | 3400 | 3000 |
| Solar input (W) | 500 | — |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycles | — | 3000 |
| Expandable | — | yes |
| Weight (lb) | 45 | 41 |
| Warranty (yr) | 5 | 5 |
| Fridge run time | 38.6 h | 29.2 h |
| CPAP run time | 46.3 h | 35 h |
| Wi-Fi router run time | 135.2 h | 102.2 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 Max or Vtoman FlashSpeed 1500?
The EcoFlow DELTA 3 Max. More capacity: 2048 Wh vs 1548 Wh.
Which is lighter, EcoFlow DELTA 3 Max or Vtoman FlashSpeed 1500?
The Vtoman FlashSpeed 1500. Lighter: 41 lb vs 45 lb.
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Compare other models → · All EcoFlow models · All Vtoman models