EcoFlow DELTA 3 Ultra vs Growatt HELIOS 3600
What is the difference?
The EcoFlow DELTA 3 Ultra has 3.6 kW of power, 7.2 kW peak, a 3.07 kWh battery. The Growatt HELIOS 3600 has 3.6 kW of power, 4.5 kW peak, a 3.69 kWh battery.
Both use LiFePO4 batteries.
Both have a 5-year warranty.
The EcoFlow DELTA 3 Ultra has 120 V AC output, the Growatt HELIOS 3600 240 V. Only 240 V output can run 240 V loads such as many well pumps, dryers and central AC.
The Growatt HELIOS 3600 can add extra batteries.
Specs side by side
| EcoFlow DELTA 3 Ultra | Growatt HELIOS 3600 | |
|---|---|---|
| Capacity (Wh) | 3072 | 3686 |
| Continuous (W) | 3600 | 3600 |
| Peak (W) | 7200 | 4500 |
| Solar input (W) | 800 | — |
| Chemistry | LiFePO4 | LFP |
| Cycles | — | 4000 |
| Expandable | — | yes |
| Weight (lb) | 72 | — |
| Warranty (yr) | 5 | 5 |
| Fridge run time | 57.9 h | 69.5 h |
| CPAP run time | 69.5 h | 83.4 h |
| Wi-Fi router run time | 202.8 h | 243.3 h |
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Specs as read from manufacturer pages on 2026-10-26 / 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 3 Ultra or Growatt HELIOS 3600?
The Growatt HELIOS 3600. More capacity: 3686 Wh vs 3072 Wh.
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Compare other models → · All EcoFlow models · All Growatt models