EcoFlow DELTA 2 vs Firman Zero E (E201001)
What is the difference?
The EcoFlow DELTA 2 has 1.8 kW of power, 2.7 kW peak, a 1.02 kWh battery. The Firman Zero E (E201001) has 2 kW of power, 4 kW peak, a 1.04 kWh battery.
The EcoFlow DELTA 2 takes up to 500 W from solar, the Firman Zero E (E201001) takes up to 400 W from solar. The EcoFlow DELTA 2 charges faster from panels.
Both have 120 V AC output.
Both can add extra batteries.
Specs side by side
| EcoFlow DELTA 2 | Firman Zero E (E201001) | |
|---|---|---|
| Capacity (Wh) | 1024 | 1040 |
| Continuous (W) | 1800 | 2000 |
| Peak (W) | 2700 | 4000 |
| Solar input (W) | 500 | 400 |
| Chemistry | LiFePO4 | — |
| Cycles | 3000 | — |
| Expandable | yes | yes |
| Weight (lb) | 26 | — |
| Warranty (yr) | — | — |
| Fridge run time | 19.3 h | 19.6 h |
| CPAP run time | 23.2 h | 23.5 h |
| Wi-Fi router run time | 67.6 h | 68.6 h |
| Check on Amazon → | Check on Amazon → |
Specs as read from manufacturer pages on 2026-10-27 / 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 charges faster from solar, EcoFlow DELTA 2 or Firman Zero E (E201001)?
The EcoFlow DELTA 2. Faster solar charging: 500 W input vs 400 W input.
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Compare other models → · All EcoFlow models · All Firman models