MARSTEK VENUS E 3.0 – 5.12kWh Home Battery

The Marstek Venus E 3.0 5.12 kWh is the next-generation home battery designed for homeowners seeking reliable, efficient, and scalable energy storage. Featuring an upgraded design, enhanced connectivity, and full compatibility with earlier Venus systems, it is ideal for both new installations and expanding existing setups. The Venus E 3.0 combines powerful performance with smart, space-saving integration for modern energy management.

✔ Maximise self-consumption while reducing reliance on the grid

✔ Smart energy investment with an efficient return on investment

✔ Integrated P1 meter support for intelligent energy management

✔ Quick and simple Plug & Play setup in as little as 5 minutes

✔ Backed by a reliable 10-year warranty


Please note that the inverter is supplied with a European output socket due to current UK standards the unit must be hardwired into a dedicated circuit or fused spur connected directly to your consumer unit.

G98 registered

ENA compliant

  • Fully recessed glass front panel helps reduce the risk of damage during transport and installation
  • Integrated RS-485 port and UTP connection provide stable wired communication with smart home and energy management systems
  • Supplied with a wall-mount bracket for a clean and space-saving installation
  • Compatible with previous Marstek V1 and V2 batteries, allowing seamless integration and combined app control
  • Redesigned housing with a sleek, modern, and durable construction
  • Compact and efficient design allows easy installation in smaller utility rooms and storage areas

Weight: 63kg

Dimensions: 620mm (h) x 480mm (w) x 160mm (d)

Technical Specifications

Battery capacity: 5.12 kWh
Nominal voltage: 51.2 V
Battery capacity: 100 Ah
Battery type: LiFePO₄ (LFP)
Depth of discharge: 90% DoD
Cycle life: ≥ 6,000 cycles
Maximum AC charging power: 2.5 kW
UK grid output: 800 W (default UK/European configuration)
Backup / EPS output: 2.5 kVA continuous
Peak backup output: 3.5 kVA (10 seconds)
AC voltage: 230 V / 50 Hz
Maximum AC current: 10.9 A
Maximum efficiency: >93.5%
Protection rating: IP65
Cooling: Natural convection / fanless
Communication: Wi-Fi, Bluetooth, Ethernet (LAN) & RS485
Operating temperature: -20°C to +55°C
Dimensions: 480 × 153 × 624 mm
Weight: approx. 60 kg
Grid connection: G98 compliant; UK units to be hardwired by a suitably qualified electrician
ENA reference: OCTRA/20616/V1 (MST-BIE5-0800)

📄 Datasheet Marstek Venus E
Price
£1,299.99
£1,299.99
Available In Stock
VAT included
Up to 10 Years Warranty
MARSTEK VENUS E 3.0 – 5.12kWh Home Battery
  • Overview
  • Specifications
“The Marstek Venus E delivers powerful, intelligent energy storage with effortless plug-and-play simplicity, making home energy management smarter, more efficient, and future-ready.”
Daniel Hartley
Smart Energy Consultant

Intelligent Home Energy

Installing Process

  • Step 1: Download the app & create an account

    Download the Marstek app from the App Store or Google Play. Create an account and log in. This way, you can easily connect everything later and see what your battery is doing.

  • Step 2: Monitor performance by installing a CT002 Meter

    This allows the battery to measure your consumption and feed-in, essential for smart control. Note: Electrician may be required to install to consumer unit. Videos available

  • Step 3: Connect the home battery

    Connect the battery to the mains and briefly press the on/off button. Then connect the battery via the app and set your preferred mode.

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