EcoFlow DELTA Pro 3 vs Grecell S5 4000W Portable Power Station
What is the difference?
The EcoFlow DELTA Pro 3 has 4 kW of power, 8 kW peak, a 4.1 kWh battery. The Grecell S5 4000W Portable Power Station has 4 kW of power, 7 kW peak, a 5.04 kWh battery.
Both use LiFePO4 batteries.
The EcoFlow DELTA Pro 3 takes up to 2600 W from solar, the Grecell S5 4000W Portable Power Station takes up to 2100 W from solar. The EcoFlow DELTA Pro 3 charges faster from panels.
The EcoFlow DELTA Pro 3 weighs 114 lb, the Grecell S5 4000W Portable Power Station weighs 112 lb.
The EcoFlow DELTA Pro 3 has 120/240 V AC output, the Grecell S5 4000W Portable Power Station 120 V. Only 240 V output can run 240 V loads such as many well pumps, dryers and central AC.
Both can add extra batteries.
Specs side by side
| EcoFlow DELTA Pro 3 | Grecell S5 4000W Portable Power Station | |
|---|---|---|
| Capacity (Wh) | 4096 | 5040 |
| Continuous (W) | 4000 | 4000 |
| Peak (W) | 8000 | 7000 |
| Solar input (W) | 2600 | 2100 |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycles | 4000 | — |
| Expandable | yes | yes |
| Weight (lb) | 114 | 112 |
| Warranty (yr) | 5 | — |
| Fridge run time | 77.2 h | 95 h |
| CPAP run time | 92.7 h | 114 h |
| Wi-Fi router run time | 270.3 h | 332.6 h |
| Check on Amazon → | Check on Amazon → |
Specs as read from manufacturer pages on 2026-10-25 / 2026-11-03. 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 Pro 3 or Grecell S5 4000W Portable Power Station?
The Grecell S5 4000W Portable Power Station. More capacity: 5040 Wh vs 4096 Wh.
Which charges faster from solar, EcoFlow DELTA Pro 3 or Grecell S5 4000W Portable Power Station?
The EcoFlow DELTA Pro 3. Faster solar charging: 2600 W input vs 2100 W input.
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Compare other models → · All EcoFlow models · All Grecell models