Venus E 3.0 product overview

Annual savings up to €1,310

AI-assisted control and real-time electricity prices help schedule charging and discharging when energy costs are most favorable.

Annual energy savings
Easy integration

100% compatible with existing PV systems

Connect Venus E 3.0 to an existing grid-tied solar installation without replacing the inverter or rebuilding the system.

Compatible with existing PV systems
Backup output

Up to 2,500 W reliable backup power

A dedicated backup connection keeps essential appliances such as lighting, routers and refrigerators running during an outage.

Reliable backup output
Marstek app

Multiple modes for every energy strategy

Switch between AI optimization, self-consumption and manual control to match the way your household uses energy.

Marstek app energy modes
Dynamic tariffs

Intelligent energy starts with AI

Venus E 3.0 can use pricing data from platforms such as Nord Pool, Tibber and Octopus Energy together with usage patterns, battery status and weather forecasts.

AI energy optimization with dynamic tariffs
Adaptive control

Zero export with smart meter control

Real-time metering and adaptive output help prevent excess solar energy from being exported to the grid.

Zero export smart meter control
Flexible ecosystem

Broad smart meter compatibility

Support for leading smart meters enables precise measurement and efficient adaptive control across different home energy setups.

Smart meter compatibility
Built for real homes

Reliable operation down to -20°C

The IP65-rated enclosure protects the system from rain and dust, while the operating range supports demanding outdoor conditions.

IP65 outdoor protection

Intelligent, quiet and built to last

Open API for EMS integration

Open API for EMS integration

Connect with platforms such as Home Assistant and ioBroker for flexible automation, custom control and access to your own energy data.

Whisper-quiet operation

Whisper-quiet operation

Natural convection cooling keeps operating noise below 30 dB, making the system suitable for everyday living environments.

Long-life LFP battery

Long-life LFP battery

More than 6,000 deep cycles, an expected service life of up to 15 years and a 10-year warranty provide long-term confidence.

Technical details

Battery

Nominal voltage 51.2 V
Energy capacity 5,120 Wh / 5.12 kWh
Capacity 100 Ah
Battery chemistry LiFePO4
Cycle life > 6,000 cycles at 25°C
Depth of discharge 90%

AC grid connection

Rated input power 2.5 kW
Output power 0.8 kW default / 2.5 kW premium
Grid voltage 230 V, 187-253 V
Rated frequency 50 Hz
Maximum input current 10.9 A
Connection Euro 16 A, 3-pin household plug
Total harmonic distortion < 3%

Backup output

Rated output power 2.5 kVA
Peak output 3.5 kVA for 10 seconds
Output voltage 230 V / 50 Hz
Output current 10.9 A
Total harmonic distortion < 3% linear load
Battery-to-AC efficiency > 93.5%

System and environment

Protection rating IP65
Cooling Natural convection, fanless
Operating temperature -20°C to +55°C
Communication Wi-Fi and RS-485
Dimensions 480 × 153 × 624 mm
Weight 60 kg
Certifications EN50549-1, IEC62040, IEC62477

What's in the box

AC cable
x1

AC cable

Warranty card
x1

Warranty card

Mounting hardware
x1

Mounting hardware

Specifications and projected savings are based on manufacturer information and ideal operating assumptions. Actual results vary with tariffs, solar production, household demand, installation and local regulations.