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CellCube installation at the Reiner Lemoine Institute

In May 2015 a CellCube FB 200-400 with a power output of 200 kW Kilowatt (kW) is a unit of electrical power (energy consumption over time), 1 Kilowatt is equal to 1,000 watts. and a capacity of 400 kWh A kilowatt hour (kWh) is the amount of energy equivalent to powering one kilowatt (1 kW) for one hour (1 kW x 1 hour). Accordingly, there are megawatt hours (1 MWh = 1000 kWh) gigawatt hours (1 GWh = 1000 MWh = 1 million kWh) and terawatt hours (1 TWh = 109 kWh = 1 billion kWh). 1 kilowatt hour of electricity is equivalent to 17 hours of light from a 60 watt bulb. was put in operation at the Reiner Lemoine Institut. The energy storage system was installed as part of the SmartPowerFlow project, which is a flagship project of the Federal Ministry for Economic Affairs and Energy in Germany. The aim of the project is the analysis how energy storage systems can increase the capacity of the grid and hereby reduce the costs of grid expansion which are necessary through the integration of renewable energies. In this case the CellCube is supporting the grid of the LEW Verteilnetz GmbH which is in need to integrate a high share of renewable energy. Consequently it is possible to quantify to what extent grid expansions can be avoided through the integration of energy storage systems.


Based on the Vanadium-Redox-Flow technology the CellCube allows for a clean and fast energy supply. The use of Vanadium Vanadium is a chemical element with the symbol V and atomic number 23. This steel-grey, bluish shimmering transition metal is mined as ore and used mainly in steel construction. Vanadium can be recovered as a by-product of energy production from coal-fired power plants and by burning heating oil. It is non-flammable, providing high level of safety and, thanks to its full reusability, has a high residual value. salts increases the safety and operating life of the storage system as they are neither flammable nor explosive and are not subject to cycle degradation. This leads to almost unlimited cycles of charging and discharging with up to 80% efficiency and a 100% depth of discharge capability.

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