Generac GB1000 vs Vtoman FlashSpeed 2400
What is the difference?
The Generac GB1000 has 1.6 kW of power, 3.2 kW peak, a 1.09 kWh battery. The Vtoman FlashSpeed 2400 has 2.4 kW of power, 3.2 kW peak, a 1.41 kWh battery.
The Generac GB1000 uses a lithium-ion (NMC) battery, the Vtoman FlashSpeed 2400 a LiFePO4 one. LiFePO4 generally lasts more charge cycles, so the Vtoman FlashSpeed 2400 should last longer.
The Generac GB1000 is rated for 800 cycles, the Vtoman FlashSpeed 2400 is rated for 3000 cycles.
The Generac GB1000 weighs 29 lb, the Vtoman FlashSpeed 2400 weighs 42 lb. The Generac GB1000 is easier to carry.
The Generac GB1000 has a 3-year warranty, the Vtoman FlashSpeed 2400 has a 2-year warranty.
Both have 120 V AC output.
Specs side by side
| Generac GB1000 | Vtoman FlashSpeed 2400 | |
|---|---|---|
| Capacity (Wh) | 1086 | 1408 |
| Continuous (W) | 1600 | 2400 |
| Peak (W) | 3200 | 3200 |
| Solar input (W) | 468 | — |
| Chemistry | NMC | LiFePO4 |
| Cycles | 800 | 3000 |
| Expandable | — | — |
| Weight (lb) | 29 | 42 |
| Warranty (yr) | 3 | 2 |
| Fridge run time | 20.5 h | 26.6 h |
| CPAP run time | 24.6 h | 31.9 h |
| Wi-Fi router run time | 71.7 h | 92.9 h |
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Specs as read from manufacturer pages on 2026-10-28 / 2026-10-30. 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, Generac GB1000 or Vtoman FlashSpeed 2400?
The Vtoman FlashSpeed 2400. More capacity: 1408 Wh vs 1086 Wh.
Which is lighter, Generac GB1000 or Vtoman FlashSpeed 2400?
The Generac GB1000. Lighter: 29 lb vs 42 lb.
Which has the longer warranty, Generac GB1000 or Vtoman FlashSpeed 2400?
The Generac GB1000. Longer warranty: 3 years vs 2 years.
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