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EcoFlow STREAM Ultra vs Marstek Venus E 3.0

Usable capacity: EcoFlow STREAM Ultra –, Marstek Venus E 3.0 –. The Marstek Venus E 3.0 is better on 3 of 8 comparable points.

Last updated: 29 September 2026+ Add a model

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

Technical specifications	EcoFlowSTREAM Ultra	MarstekVenus E 3.0
General
Cell chemistry	LFP¹	LFP²
Smart charging on dynamic prices	Yes¹	–
Wi-Fi / app	Yes¹	Yes²
Performance
Nominal capacity	1.92 kWh¹	5.12 kWh✓²
Expandable up to	11.52 kWh¹	–
Charge power (continuous)	1.05 kW¹	2.5 kW✓²
Discharge power (continuous)	1.2 kW¹	2.5 kW✓²
Efficiency
Depth of discharge	–	90 %²
Electrical
Coupling	–	AC-coupled²
Backup power	Yes¹	Yes²
Off-grid capable	Yes¹	–
Dimensions & weight
IP rating	IP65¹	IP65²
Min. operating temperature	-20 °C¹	-20 °C²
Width	284 mm¹	–
Height	458 mm¹	624 mm²
Depth	255 mm¹	–
Weight	23.1 kg✓¹	60 kg²
Warranty & lifespan
Warranted cycles	6,000¹	6,000²
Warranty	10 years¹	–

Usable capacity: EcoFlow STREAM Ultra –, Marstek Venus E 3.0 –. The Marstek Venus E 3.0 is better on 3 of 8 comparable points.

Marstek Venus E 3.0: 5.12 kWh. EcoFlow STREAM Ultra: 1.92 kWh.

EcoFlow STREAM Ultra: 23.1 kg. Marstek Venus E 3.0: 60 kg.