MARSTEK VENUS B

1.5kW Bi-Directional Power
1.5kW Backup Power (Peak 1.8 kW)
2kWh Capacity
Compact Wall-Mounted Design
True Plug & Play Installation
MARSTEK Intelligence
Anti Feed-in Control

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Overview

Specs

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800W/1.5kW 2kWh Plug-in
AC-Coupled ESS

At just 86mm thin and only 25kg light, the VENUS B is the most compact balcony storage solution yet. Its refined structure blends quietly and efficiently into any home environment.

The VENUS B features a powerful 1.5kW bidirectional on-grid inverter, enabling intelligent energy scheduling to maximize self-consumption and reduce electricity costs.

1.5kW Continuous Backup with <15ms Seamless Switch

Enjoy peace of mind with 1.5kW of stable backup power (1.8kW peak). The EPS-grade automatic switch triggers in less than 15ms—so fast your appliances won't even notice the grid went down.

2kWh Tailored Capacity for Daily Energy Savings

Each unit provides a precise 2kWh of storage, perfectly optimized for European households to perform peak-shaving and ensure critical loads remain powered during high-tariff periods.

5-Minute Instant Setup via AC-Coupling Technology

No rewiring, no DC-side intervention. The AC-coupled design allows you to plug the VENUS B directly into your home grid just like a standard appliance, completing installation in under 5 minutes.

Intelligent Energy Forecasting and TOU Management

Driven by Marstek AI, the system learns your home’s energy patterns and integrates weather data to automatically charge when prices are low and discharge when they are high, maximizing your savings.

Precise Anti-Feed in Control for Total Self-Consumption

Compatible with smart meters like Marstek and Shelly, the VENUS B ensures all generated energy stays within your home, providing efficient energy management within regulatory compliance.

Universal Integration with 100% of Existing Solar Systems

The VENUS B works independently of your solar inverter brand or protocol. It adds storage to any existing system without the need to replace or modify your current setup.

Scalable Whole-Home Backup up to 6kWh

Pair with the Single-Phase SmartBox to expand your system up to 3 units, delivering a massive 4.5kW output and 6kWh of capacity for comprehensive whole-home energy security.

Real-Time Monitoring and Smart Mode Switching

Track energy flow, manage multiple devices, and switch between Manual, Self-Consumption, or AI-Optimized modes anytime, anywhere via the intuitive Marstek App.

Utilizing ultra-safe Lithium Iron Phosphate chemistry, the VENUS B offers over 6000 deep cycles, ensuring a stable and reliable energy supply for over a decade.

The built-in Battery Management System provides 24/7 monitoring and six layers of protection, ensuring reliable and safe operation.

Operates reliably in extreme temperatures from -20°C to 60°C.

Built to withstand the elements, the IP65-rated enclosure is completely dustproof and splash-resistant, making it suitable for balconies, garages, or outdoor installations.

Save Up to 533€ Annually with AI-Driven Dual-Cycle Optimization

By performing two daily cycles—leveraging surplus solar during the day and AI-optimized TOU arbitrage at night—the VENUS B maximizes your energy economy. With a 0.35€/kWh price spread, you can achieve a net daily gain of 1.46€, translating to over 533€ in annual electricity savings.

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MARSTEK VENUS B

1.5kW Bi-Directional Power

1.5kW Backup Power (Peak 1.8 kW)

2kWh Capacity

Compact Wall-Mounted Design

True Plug & Play Installation

MARSTEK Intelligence

Anti Feed-in Control

MARSTEK VENUS B

The World's Thinnest Plug-in ESS

1.5kW High-Efficiency Bidirectional Power

1.5kW Continuous Backup with <15ms Seamless Switch

2kWh Tailored Capacity for Daily Energy Savings

5-Minute Instant Setup via AC-Coupling Technology

Intelligent Energy Forecasting and TOU Management

Precise Anti-Feed in Control for Total Self-Consumption