EcoFlow OCEAN 2 LFP Battery 8kWh vs Marstek Venus E 3.0
Usable capacity: EcoFlow OCEAN 2 LFP Battery 8kWh 7.76 kWh, Marstek Venus E 3.0 –. The EcoFlow OCEAN 2 LFP Battery 8kWh is better on 3 of 7 comparable points.
Who wins where
- EcoFlow OCEAN 2 LFP Battery 8kWh
- Marstek Venus E 3.0
Biggest differences
| Fact | OCEAN 2 LFP Battery 8kWh | Venus E 3.0 |
|---|---|---|
| Charge power (continuous) | 4.1 kW | 2.5 kW |
| Discharge power (continuous) | 4.1 kW | 2.5 kW |
| Nominal capacity | 8.03 kWh | 5.12 kWh |
| Weight | 67.5 kg | 60 kg |
Score per area = position (0–100) relative to all 130 models in this category; higher is better.
| Technical specifications | EcoFlowOCEAN 2 LFP Battery 8kWh | MarstekVenus E 3.0 |
|---|---|---|
| General | ||
| Cell chemistry | LFP 1 | LFP 2 |
| Wi-Fi / app | Yes 1 | Yes 2 |
| Performance | ||
| Usable capacity | 7.76 kWh 1 | – |
| Nominal capacity | 8.03 kWh ✓ 1 | 5.12 kWh 2 |
| Charge power (continuous) | 4.1 kW ✓ 1 | 2.5 kW 2 |
| Discharge power (continuous) | 4.1 kW ✓ 1 | 2.5 kW 2 |
| Peak power | 6.4 kW 1 | – |
| Efficiency | ||
| Depth of discharge | – | 90 % 2 |
| Electrical | ||
| Coupling | DC-coupled 1 | AC-coupled 2 |
| Backup power | Yes 1 | Yes 2 |
| Dimensions & weight | ||
| IP rating | IP66 1 | IP65 2 |
| Min. operating temperature | -20 °C 1 | -20 °C 2 |
| Width | 680 mm 1 | – |
| Height | 378 mm 1 | 624 mm 2 |
| Depth | 196 mm 1 | – |
| Weight | 67.5 kg 1 | 60 kg ✓ 2 |
| Warranty & lifespan | ||
| Warranted cycles | – | 6,000 2 |
Sources
- EcoFlow OCEAN 2 Three-Phase – Datasheet (EN), Datasheet_EN, PDF van 08.09.2026 — EcoFlow Inc. · accessed 27 Sept 2026
- MARSTEK VENUS-E (MST-BIE5-2500) – User Manual, 5. Technical Specifications, 2025-05-08 (PDF september 2025) — Marstek Energy Co., Limited · accessed 27 Sept 2026