Marstek VENUS B 2kWh Plug-in Home Battery – 1.5kW Bidirectional | Plug & Play Balcony Storage
The Marstek VENUS B is an ultra-compact 2kWh plug-in home battery equipped with a powerful 1.5kW bidirectional inverter. This innovative AC-coupled energy storage system allows you to store excess solar energy and use it when electricity prices are higher.
Thanks to its extremely slim design of only 86 mm and a weight of just 20 kg, the VENUS B is one of the most compact balcony battery solutions available. It is specifically designed for apartments, balcony solar systems and existing PV installations and can simply be connected via a standard power outlet.
With AI-driven energy management, backup power capability, anti-feed-in control and universal compatibility with all inverters, the Marstek VENUS B is a smart solution for maximizing self-consumption and reducing electricity costs.
Key Benefits of the Marstek VENUS B
1.5kW High-Efficiency Bidirectional Power
The integrated 1.5kW on-grid bidirectional inverter allows efficient charging and discharging of stored energy, enabling optimized energy use throughout the day.
Reliable Backup Power
The VENUS B delivers 1.5kW continuous backup power (1.8kW peak). With an automatic switch time of less than 15 milliseconds, connected appliances continue operating seamlessly during power outages.
2kWh Storage Capacity
The 2kWh battery capacity is perfectly suited for European households to reduce peak consumption and maximize solar energy usage.
5-Minute Plug & Play Installation
Thanks to AC-coupled technology, installation is extremely simple. Just plug the battery into a standard outlet and it is ready to operate.
AI-Driven Energy Management
Marstek Intelligence AI analyzes energy consumption patterns, weather forecasts and electricity prices to automatically charge when electricity is cheap and discharge when prices rise.
Anti-Feed-in Control
Compatible with smart meters such as Marstek Smart Meter and Shelly, ensuring that generated solar energy remains within your household.
Universal Solar Compatibility
The VENUS B works with 100% of existing solar systems, regardless of inverter brand.
Expandable up to 6kWh
With the optional Single-Phase SmartBox, up to 3 units can be connected, delivering 4.5kW output and 6kWh capacity.
Smart Monitoring via the Marstek App
Monitor energy production, consumption and storage in real time and switch between different operating modes.
Premium LFP Battery Technology
Using Lithium Iron Phosphate (LiFePO4) cells with more than 6000 cycles and a design lifetime of up to 15 years.
Weather-Resistant Design
The IP65 housing allows installation both indoors and outdoors, including balconies and garages.
Wide Operating Temperature
Reliable performance from -20°C to 60°C.
Save up to €533 per year on electricity
By combining solar charging during the day and AI-optimized electricity price arbitrage at night, the VENUS B can perform two charge cycles daily, saving up to €533 annually on electricity costs.
Technical Specifications
Model: Marstek VENUS B
Type: AC-Coupled Plug-in ESS
Battery Capacity: 2 kWh
Battery Type: LiFePO4 (LFP)
Bidirectional Power: 1.5 kW
Backup Power: 1.5 kW (1.8 kW peak)
Switch Time: <15 ms
Expandable Capacity: up to 6 kWh
Protection Class: IP65
Operating Temperature: -20°C to 60°C
Weight: approx. 20 kg
Installation: Plug & Play via power outlet
Monitoring: Marstek App
Battery Life: >6000 cycles
