MARSTEK VENUS E 4.0 – 5kWh Plug & Play Home Battery with Backup Power

Powerful 3kW Bidirectional Inverter

The MARSTEK VENUS E 4.0 features a powerful 3kW bidirectional grid-connected inverter, perfectly matched to the energy needs of most households. The system intelligently manages energy flows between solar panels, battery storage, household consumption, and the grid, significantly increasing self-consumption and reducing electricity costs.

Whole-Home Backup Power with Ultra-Fast EPS (<10ms)

In the event of a power outage, the VENUS E 4.0 automatically switches to backup mode in less than 10 milliseconds.

Key benefits:

• 3kW continuous backup power
• Ultra-fast transfer time (<10ms)
• Protection against grid outages
• Keeps essential appliances running

5kWh Capacity for Greater Energy Independence

With 5kWh of usable storage capacity, the VENUS E 4.0 stores excess solar energy during the day for use during the evening, at night, or during expensive peak tariff periods.

Ideal for:

• Medium and large households
• Homes with solar panels
• Dynamic electricity tariffs
• Maximum self-consumption strategies

True Plug & Play Installation

Thanks to its innovative AC-coupled architecture and unique three-in-one connection interface, installation can be completed in less than 10 minutes.

• Wall-mounted or floor-standing installation
• Minimal electrical modifications required
• Ready for immediate operation

New Slim Design with Hidden Connections

The VENUS E 4.0 features a completely redesigned, slimmer and lighter enclosure. The magnetic hidden cable cover conceals all wiring for a clean and modern appearance.

Intelligent Display with Millimeter-Wave Radar

The integrated millimeter-wave radar automatically activates the display when a user approaches and switches it off when no one is nearby, improving user experience while reducing unnecessary energy consumption.

AI-Powered Energy Optimization

Advanced AI algorithms continuously analyze:

• Household consumption patterns
• Weather forecasts
• Electricity prices
• Solar generation

The system automatically optimizes charging and discharging cycles to maximize savings and efficiency.

Potential annual savings: up to €1,509.

VPP Integration – Turn Your Battery into a Revenue Generator

Through Virtual Power Plant (VPP) integration, the VENUS E 4.0 can automatically participate in energy trading and grid-balancing services.

Benefits include:

• Selling stored energy during peak demand
• Supporting grid stability
• Generating additional revenue

Smart EV Charging Control

The VENUS E 4.0 seamlessly integrates with MARSTEK portable EV chargers and automatically schedules vehicle charging based on:

• Electricity prices
• Solar surplus
• Household consumption

Expandable up to 15kWh and 9kW

Using the optional SmartBox, up to three VENUS E 4.0 units can be connected.

Maximum system configuration:

• 15kWh storage capacity
• 9kW output power
• Whole-home backup capability

Real-Time Monitoring via Marstek App

Monitor and control your system anywhere through the Marstek App:

• Real-time energy flows
• Battery status
• Historical data
• Savings overview
• Smart operating modes

Advanced Battery Protection

The integrated Smart BMS protects against:

• Overcurrent
• Overvoltage
• Overheating
• Short circuits
• Deep discharge

Premium LFP Battery Technology

The VENUS E 4.0 uses high-quality 314Ah Lithium Iron Phosphate (LiFePO4) cells.

Benefits:

• More than 10,000 cycles
• Over 15 years design life
• Exceptional safety
• Long-term reliability

Connectivity

Supports:

• Wi-Fi
• Bluetooth
• LAN

Open API support allows integration with third-party EMS platforms.

Smart Meter Compatibility

Compatible with:

• Marstek Smart Meter
• Shelly Pro 3EM
• P1 Meter
• Other mainstream smart meters

Achieves near 100% self-consumption while preventing unwanted export to the grid.

Indoor & Outdoor Installation

With an IP65 protection rating and operating temperatures from -20°C to +60°C, the VENUS E 4.0 performs reliably in a wide range of environments.

Ultra-Quiet Operation

Natural convection cooling keeps operating noise below 30dB, making it suitable for installation anywhere in the home.