EcoFlow DELTA 3 Classic vs Generac GB1000
What is the difference?
The EcoFlow DELTA 3 Classic has 1.8 kW of power, a 1.02 kWh battery. The Generac GB1000 has 1.6 kW of power, 3.2 kW peak, a 1.09 kWh battery.
The EcoFlow DELTA 3 Classic uses a LiFePO4 battery, the Generac GB1000 a lithium-ion (NMC) one. LiFePO4 generally lasts more charge cycles, so the EcoFlow DELTA 3 Classic should last longer.
The EcoFlow DELTA 3 Classic takes up to 500 W from solar, the Generac GB1000 takes up to 468 W from solar. The EcoFlow DELTA 3 Classic charges faster from panels.
The EcoFlow DELTA 3 Classic weighs 27 lb, the Generac GB1000 weighs 29 lb. The EcoFlow DELTA 3 Classic is easier to carry.
The EcoFlow DELTA 3 Classic has a 5-year warranty, the Generac GB1000 has a 3-year warranty.
Both have 120 V AC output.
Specs side by side
| EcoFlow DELTA 3 Classic | Generac GB1000 | |
|---|---|---|
| Capacity (Wh) | 1024 | 1086 |
| Continuous (W) | 1800 | 1600 |
| Peak (W) | — | 3200 |
| Solar input (W) | 500 | 468 |
| Chemistry | LiFePO4 | NMC |
| Cycles | — | 800 |
| Expandable | — | — |
| Weight (lb) | 27 | 29 |
| Warranty (yr) | 5 | 3 |
| Fridge run time | 19.3 h | 20.5 h |
| CPAP run time | 23.2 h | 24.6 h |
| Wi-Fi router run time | 67.6 h | 71.7 h |
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Specs as read from manufacturer pages on 2026-10-25 / 2026-10-28. 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 Generac GB1000?
The Generac GB1000. More capacity: 1086 Wh vs 1024 Wh.
Which is lighter, EcoFlow DELTA 3 Classic or Generac GB1000?
The EcoFlow DELTA 3 Classic. Lighter: 27 lb vs 29 lb.
Which has the longer warranty, EcoFlow DELTA 3 Classic or Generac GB1000?
The EcoFlow DELTA 3 Classic. Longer warranty: 5 years vs 3 years.
Which charges faster from solar, EcoFlow DELTA 3 Classic or Generac GB1000?
The EcoFlow DELTA 3 Classic. Faster solar charging: 500 W input vs 468 W input.
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Compare other models → · All EcoFlow models · All Generac models