Solution Offering

Vitocharge VX3: this modular electricity storage system can now be cascaded up to 75 kWh

The energy transition and the desire for greater independence from electricity suppliers are increasingly focusing on photovoltaic systems and electricity storage. To ensure optimal use of solar power, Viessmann has developed the modular Vitocharge VX3 electricity storage system. Up to five units can now be combined to form a cascade.

Vitocharge VX3: The modular hybrid power storage system is the ideal addition to a photovoltaic system.

  • Electricity storage is the heart of every system solution for heat and power
  • Modular Vitocharge VX3 for single-family and multi-family homes as well as commercial enterprises
  • 360° safety concept

Allendorf (Eder), 06 / 28 / 2024 – Holistic system solutions comprising a photovoltaic system, electricity storage system, heat pump and other electric heating systems as well as a wallbox enable homeowners to be less dependent on the public power supply and to reduce their carbon footprint. The self-generated electricity not only allows them to heat and cool their homes and charge their electric vehicles, it also takes pressure off the public electricity grids at peak load times. The key component of any heat and electricity system solution is an electricity storage system such as the Vitocharge VX3, which is now also available for cascading applications of up to 75 kWh.

The modular hybrid electricity storage system with up to three batteries per unit, each with a storage capacity of 5 kilowatt hours (5/10/15 kWh), can now also be cascaded with up to five units. This then provides storage capacities of up to 75 kilowatt hours, which is enough to meet the daily electricity demand of large single-family homes, residential complexes and smaller businesses such as supermarkets or trade premises.

For maximum safety: 360° safety concept

The development and production of the new Vitocharge VX3 also included the creation of a 360° electricity storage system safety concept. It is based on reliable cell chemistry and redundant software for sensor technology and shut-down functions.

The software quickly detects any potential faults and prompts the activation of a safe operating state. This built-in safety feature is triggered in the event of overloading, short-circuiting, external heating, serious damage or flooding. This virtually eliminates the risk of fire and the risk of neighboring cells catching fire.

Reliable operation thanks to lithium-iron-phosphate cells

All Vitocharge VX3 battery modules consist of tried-and-tested lithium-iron-phosphate cells (LFP). They feature a high number of cycles, giving them high durability. Thanks to low self-discharge, the stored electricity is available for maximum use.

Benefits for trade partners

  • Expansion of core business to include solar applications
  • Additional area of activity for private and commercial customers

Benefits for users

  • Seamless integration with Viessmann energy systems (heating, cooling, ventilation)
  • High operational reliability thanks to lithium-iron-phosphate cells (LFP)
  • Very low self-discharge
  • Software-based function monitoring
  • 360° safety concept
  • Energy management via ViCare app
  • Greater self-sufficiency thanks to increased storage capacity
  • Operation of heat pumps with self-generated electricity
  • Charging of electric vehicles with self-generated electricity
  • Flexible installation even in small spaces (1.8 m)

Technical specifications

  • Battery features
    • Usable storage capacity: 5/10/15 kWh
    • Battery unit dimensions: 600 x 500 x 250 mm (width x height x depth)
  •   Inverter features
    • AC power classes:  
      • 4.6 kVA (single-phase), max. 7 kWp
      • 6.0 kVA (three-phase) max. 9 kWp
      • 8.0 kVA (three-phase) max. 12 kWp
    •   Inverter unit dimensions: 600 x 500 x 250 mm (width x height x depth)
  • Interface: EEBUS and with accessories KNX and Modbus


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Holistic system solution from Viessmann: Vitovolt 300-DG photovoltaic system with Vitocal 250-A air/water heat pump, Vitocell Modular DHW cylinder and heating water buffer cylinder, charging station and Vitocharge VX3 electricity storage system.

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The Vitocharge VX3 hybrid electricity storage system from Viessmann is now also available for cascading applications with up to five cylinders and up to a maximum of 75 kWh.

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For maximum safety: The 360° safety concept of the Vitocharge VX3 is based on reliable cell chemistry and redundant software for sensors and shutdown devices.

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