
Open API for EMS integration
Connect with platforms such as Home Assistant and ioBroker for flexible automation, custom control and access to your own energy data.





The Marstek Venus E 3.0 5.12 kWh is the latest-generation home battery, specially developed for users who value reliability, efficiency, and scalability. With a renewed design, improved connectivity, and compatibility with previous versions, this battery is an ideal choice for both new installations and the expansion of existing systems. The 3.0 version proves that compact power and smart integration can work perfectly together.
Key Features
Fully recessed glass front panel – reduces the risk of damage during unpacking or installation.
Direct network connection: equipped with an RS-485 port and UTP connection, the Venus E 3.0 allows for a fixed data cable connection, ideal for stable communication with external devices or home automation systems.
Flexible wall mounting: the battery is supplied as standard with a wall bracket, making it easy to mount on the wall for a clean, space-saving installation.
Compatible with previous versions: the Venus E 3.0 can work seamlessly with Marstek V1 and V2 batteries. Different versions can be connected and jointly controlled through the app.
Modern and robust design: the housing has been redesigned with a sleek and functional appearance. Please note: unlike the V2, the V3 does not have integrated handles or wheels.
Space-efficient and powerful: thanks to its compact construction and smart layout, the Venus E 3.0 is easy to install, even in smaller technical rooms or storage spaces.
Technical Specifications
Nominal voltage: 51.2V
Capacity: 5.12 kWh
Cycle life: >6000 cycles at 90% DoD
Dimensions: 620 mm (H) x 480 mm (W) x 160 mm (D)
Weight: 63 kg
Fast delivery across the Netherlands and Europe.
10-year manufacturer warranty.
Professional support before and after purchase.

Marstek Venus E 3.0 – Plug & Charge Home Battery 5.12 kWh – Including P1 Meter

AI-assisted control and real-time electricity prices help schedule charging and discharging when energy costs are most favorable.

Connect Venus E 3.0 to an existing grid-tied solar installation without replacing the inverter or rebuilding the system.

A dedicated backup connection keeps essential appliances such as lighting, routers and refrigerators running during an outage.

Switch between AI optimization, self-consumption and manual control to match the way your household uses energy.

Venus E 3.0 can use pricing data from platforms such as Nord Pool, Tibber and Octopus Energy together with usage patterns, battery status and weather forecasts.

Real-time metering and adaptive output help prevent excess solar energy from being exported to the grid.

Support for leading smart meters enables precise measurement and efficient adaptive control across different home energy setups.

The IP65-rated enclosure protects the system from rain and dust, while the operating range supports demanding outdoor conditions.


Connect with platforms such as Home Assistant and ioBroker for flexible automation, custom control and access to your own energy data.

Natural convection cooling keeps operating noise below 30 dB, making the system suitable for everyday living environments.

More than 6,000 deep cycles, an expected service life of up to 15 years and a 10-year warranty provide long-term confidence.



Specifications and projected savings are based on manufacturer information and ideal operating assumptions. Actual results vary with tariffs, solar production, household demand, installation and local regulations.