MARSTEK VENUS E 3 household battery storage 2.5kW, 5.12kWh

Venus E Gen 3.0 Improvements at a Glance

Significant improvements in design and user comfort. Discover what’s new.

38.5% Smaller Volume Compared to Venus E 2.0

Venus E Gen 3.0 features our most refined design yet.

With a slimmer profile, rounded edges, and a 38.5% smaller volume compared to the previous generation, it naturally fits into any living space.

5-Second Plug & Play Installation With AC-Coupling technology, Venus E Gen 3.0 connects with only one cable — no tools, no delay. 4

Unshakable Communication now with LAN port

Venus E Gen 3.0 features a dedicated LAN port, enabling real-time, wired communication with your home energy system. Compared to Bluetooth or Wi-Fi, LAN ensures faster response, better stability, and zero signal interference — especially in complex or signal-congested environments.

Up to 2500 W of Power When Connected to the Grid

Sufficient power to run all essential household appliances simultaneously – from a microwave oven to a refrigerator.

Venus E Gen 3.0 provides continuous power of up to 2500 W when connected to the electrical grid, ensuring smooth and reliable operation.

* The default output power when connected to the grid is 800 W. Increasing the output power to 2500 W requires approval from the relevant distribution system operator or competent authority.

100% Compatibility with Existing Photovoltaic Systems

Venus E Gen 3.0 is designed to work seamlessly with your existing grid-connected photovoltaic system. There is no need to replace your existing inverter or modify the current installation.

Simply connect it and start storing more of the energy generated by your photovoltaic system for later use.

Up to 2500 W of Reliable Backup Power

Venus E Gen 3.0 features a dedicated backup power output that provides up to 2500 W of power in the event of a grid outage.

During a power outage, you can continue powering essential appliances such as lights, a Wi-Fi router, or a refrigerator, ensuring uninterrupted operation of selected devices.

Whole-Home Backup Power with the MARSTEK Smart Box

Venus E Gen 3.0 supports whole-home backup power when combined with the MARSTEK Smart Box. Whether you use a single unit or multiple units connected in parallel, the entire home can be supplied with power during a grid outage.

Multiple Modes for Different Needs

Using the MARSTEK app, you can easily switch between AI Optimization, Self-Consumption, and Manual Mode.

Venus E Gen 3.0 adapts to your energy needs – whether you prefer fully automated control, intelligent optimization, or manual settings.

Smarter Energy Management with AI and Dynamic Tariffs

The AI Mode of Venus E Gen 3.0 automatically schedules charging based on current electricity prices in your region from platforms such as Nord Pool, Tibber, and Octopus Energy.

The system learns your energy consumption habits, analyzes the battery status and weather forecast, and continuously adjusts the charging time and charging amount. This helps reduce electricity costs and maximize energy savings – without the need for manual configuration.

Zero Feed-in to Grid enabled by Smart Meter

With real-time smart meter integration and adaptive control, Venus E Gen 3.0 ensures no surplus solar energy is exported to the grid, making it ideal for areas with export restrictions or limited feed-in tariffs

Technical Specifications

Battery

• Usable capacity: 5.12 kWh

• Battery technology: LiFePO₄ (lithium iron phosphate)

• Cell capacity: 100 Ah

• Lifetime: more than 6,000 deep charge cycles

• Expected system lifetime: up to 15 years

Power and Inverter

• Integrated inverter: high-efficiency bidirectional grid-tied inverter

• Rated AC power: 2.5 kW (2,500 W)

• Backup power in EPS mode: 2.5 kW (2,500 W)

Connectivity and Communication

• Communication interfaces: Wi-Fi, Bluetooth, LAN, RS-485

• Remote control and monitoring: MARSTEK App

• Integration with external systems: EMS platform support via open API

• Smart meter compatibility: MARSTEK, Shelly, HomeWizard, everHome, and other supported brands