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EcoFlow STREAM Pro vs Marstek Venus C

Usable capacity: EcoFlow STREAM Pro –, Marstek Venus C 2.56 kWh. The Marstek Venus C is better on 2 of 8 comparable points.

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Who wins where

  • EcoFlow STREAM Pro
  • Marstek Venus C
GeneralPerformanceElectricalDimensions & weightWarranty & lifespan

Biggest differences

FactSTREAM ProVenus C
Charge power (continuous)1.05 kW2.5 kW
Nominal capacity1.92 kWh2.56 kWh
All specifications ↓

Score per area = position (0–100) relative to all 140 models in this category; higher is better.

EcoFlowSTREAM ProMarstekVenus C
General
Cell chemistryLFP1LFP2
Smart charging on dynamic pricesYes1–
Wi-Fi / appYes1Yes2
Performance
Usable capacity–2.56 kWh2
Nominal capacity1.92 kWh12.56 kWh✓2
Expandable up to11.52 kWh1–
Charge power (continuous)1.05 kW12.5 kW✓2
Discharge power (continuous)1.2 kW1–
Electrical
Coupling–AC-coupled2
Backup powerYes1Yes2
Off-grid capableYes1Yes2
Dimensions & weight
IP ratingIP651IP652
Min. operating temperature-20 °C1-20 °C2
Width284 mm1450 mm2
Height458 mm1550 mm2
Depth255 mm1200 mm2
Weight22.8 kg1–
Warranty & lifespan
Warranted cycles6,00016,0002
Warranty10 years110 years2

Frequently asked questions

Which is better: the EcoFlow STREAM Pro or the Marstek Venus C?

Usable capacity: EcoFlow STREAM Pro –, Marstek Venus C 2.56 kWh. The Marstek Venus C is better on 2 of 8 comparable points.

Which is better on charge power (continuous): the EcoFlow STREAM Pro or the Marstek Venus C?

Marstek Venus C: 2.5 kW. EcoFlow STREAM Pro: 1.05 kW.

Which is better on nominal capacity: the EcoFlow STREAM Pro or the Marstek Venus C?

Marstek Venus C: 2.56 kWh. EcoFlow STREAM Pro: 1.92 kWh.

How we collect and check this data →

Sources

  1. EcoFlow STREAM Ultra/Pro Specifications, 1.0 — EcoFlow UK · accessed Sep 29, 2026
  2. MARSTEK VENUS C / E AC-Coupled Energy Storage System, 1.0 — Marstek · accessed Oct 16, 2026