EcoFlow STREAM AC Pro vs Marstek Venus E
A side-by-side look at the EcoFlow STREAM AC Pro and Marstek Venus E. Winning figures are highlighted.
| EcoFlow EcoFlow STREAM AC Pro | Marstek Marstek Venus E | |
|---|---|---|
| Price from | £789 | £999 |
| Usable capacity | 1.92 kWh | 5.12 kWh |
| Max expandable | 11.52 kWh | 5.12 kWh |
| Max AC output | 800 W | 800 W |
| Max PV input | 0 W | 0 W |
| Cycle life | 6000 | 6000 |
| Weatherproofing | IP65 | IP65 |
| App control | Yes | Yes |
| AC-coupled (works without panels) | Yes | Yes |
EcoFlow STREAM AC Pro
The natural upgrade path if you started with a STREAM microinverter: stack it under the inverter and your clipped surplus goes into storage instead of nowhere. AC-coupled mode means it also earns its keep on a time-of-use tariff before you buy a single panel. The only genuinely UK-stocked battery of the three, though it sells out fast.
Full EcoFlow STREAM AC Pro review →Marstek Venus E
Different from the rest: the Venus E has no solar input — it's a plug-in battery for off-peak tariff arbitrage. On a tariff like Octopus Agile it can pay back through cheap-rate charging even without panels.
Full Marstek Venus E review →