Uninterrupted power supply thanks to 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. redox Red stands for reduction = gain of electrons, while Ox stands for oxidation = loss of electrons flow technology. The energy management and storage system CellCube stores energy until it is needed. What is more, it has a capacity of up to 6 MWh and 100% deep discharge The term deep discharge generally refers to the withdrawal of almost all of the capacity of the battery. It is discharged to such an extent that the voltage drops below the final discharge voltage..