EcoFlow STREAM Pro vs Marstek Venus E 4.0
Usable capacity: EcoFlow STREAM Pro –, Marstek Venus E 4.0 –. The Marstek Venus E 4.0 is better on 5 of 9 comparable points.
Who wins where
- EcoFlow STREAM Pro
- Marstek Venus E 4.0
Biggest differences
| Fact | STREAM Pro | Venus E 4.0 |
|---|---|---|
| Charge power (continuous) | 1.05 kW | 3 kW |
| Nominal capacity | 1.92 kWh | 5.02 kWh |
| Discharge power (continuous) | 1.2 kW | 3 kW |
| Weight | 22.8 kg | 47.2 kg |
| Warranted cycles | 6,000 | 10,000 |
| Expandable up to | 11.52 kWh | 15 kWh |
Score per area = position (0–100) relative to all 130 models in this category; higher is better.
| Technical specifications | EcoFlowSTREAM Pro | MarstekVenus E 4.0 |
|---|---|---|
| General | ||
| Cell chemistry | LFP 1 | LFP 2 |
| Smart charging on dynamic prices | Yes 1 | – |
| Wi-Fi / app | Yes 1 | Yes 2 |
| Performance | ||
| Nominal capacity | 1.92 kWh 1 | 5.02 kWh ✓ 2 |
| Expandable up to | 11.52 kWh 1 | 15 kWh ✓ 2 |
| Charge power (continuous) | 1.05 kW 1 | 3 kW ✓ 2 |
| Discharge power (continuous) | 1.2 kW 1 | 3 kW ✓ 2 |
| Efficiency | ||
| Depth of discharge | – | 88 % 2 |
| Electrical | ||
| Backup power | Yes 1 | Yes 2 |
| Off-grid capable | Yes 1 | – |
| Dimensions & weight | ||
| IP rating | IP65 1 | IP65 2 |
| Min. operating temperature | -20 °C 1 | -20 °C 2 |
| Width | 284 mm 1 | – |
| Height | 458 mm 1 | – |
| Depth | 255 mm 1 | – |
| Weight | 22.8 kg ✓ 1 | 47.2 kg 2 |
| Warranty & lifespan | ||
| Warranted cycles | 6,000 1 | 10,000 ✓ 2 |
| Warranty | 10 years 1 | – |
Sources
- EcoFlow STREAM Ultra/Pro Specifications, 1.0 — EcoFlow UK · accessed 29 Sept 2026
- MARSTEK VENUS E 4.0 – Brochure / Specifications, juni 2026 — Marstek Energy Co., Limited · accessed 27 Sept 2026