MARSTEK Venus E 5kWh PLUG & PLAY (V3)
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The Marstek Venus E is a so-called “plug-and-play” AC-coupled home battery (energy storage system) designed to work in conjunction with existing PV (solar panel) installations without the need for a hybrid inverter.
The Gen 3.0 version is a more recent version with improvements in design, communication capabilities and performance.
Key Features & Specifications
Here are the notable technical features and uses:
| Characteristic | Value / comment |
|---|---|
| Capacity | 5.12 kWh (usable energy storage) |
| Output power (on-grid & backup) | Up to 2.5 kW AC output (on-grid) and also for backup power supply |
| Input for charging | Up to 2.5 kW AC charging power |
| Cycle life | > 6000 full cycle charges |
| Efficiency | The battery ↔ AC conversion is > 93.5% (according to Marstek) |
| Protection / environment | IP65 housing (dust and splash proof) |
| Temperature range | Operation possible over a wide temperature range, e.g. down to –20 °C |
| Communication & integration | WiFi, Bluetooth, RS485, Ethernet (LAN port added) |
| Backup function / switchover | 15 ms or equivalent fast switch to backup mode in case of power failure |
| Extensibility / scalability | Multiple units in parallel possible (e.g. up to 3 units on single phase) |
| Warranty | 10 year factory warranty is often mentioned |
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Energy buffer for self-consumption
You can store excess solar energy in the battery and use it later, making you less dependent on the grid and allowing you to better manage your own consumption. -
Backup in case of power failure
The Venus E can continue to power critical loads if the grid fails (e.g. lighting, refrigerators, communication devices). -
Smart control & rates
Thanks to AI-based optimization modes, coupling with dynamic electricity tariffs, and real-time metering, the battery can attempt to charge/discharge at the optimal time. -
No inverter adjustment required
Because the system is AC coupled, you can add it to existing installations without replacing your existing PV inverter. -
Flexibility & modularity
You can combine multiple units to achieve greater capacity or power if you require additional storage or backup capacity.
The integrated EMS automatically optimizes consumption, storage, and grid load. In the event of a power outage, the system switches to backup power within ≤10 ms.
With a built-in EMS (Energy Management System), support for peak shaving, and flexible charge and discharge settings, energy balance is automatically adjusted to consumption, grid status, and storage.
With an IP66 enclosure, silent passive cooling, and real-time monitoring via app or WiFi, the inverter offers reliability, ease of use, and minimal maintenance requirements.
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