The battery racks developed by FET are diversified and different in size and capacity. The difference between the racks lies mainly in the lithium cells used. The RACK-BMOD01 mounts cylindrical 26680 cells of different capacities and performances. Numerous formats of different capacities and shapes have been developed. Some Raks are very thin and extended, others are more proportionate in size. All aimed to optimize spaces. The racks developed by FET have BMSS in common and as the main feature the lithium cells are not welded but assembled using specially developed pressure contacts. Not soldering the cells to the lithium means simplicity of maintenance and protection of the cells which can subsequently be stripped and reused for other applications or simply disposed of with easier procedures. Each rack includes a BMSS that allows thermal surveillance at the cell level, the equalization (balancing) function or local charging