The REFUtower is an energy storage system which guarantees the network-independent power supply. The device is a real multi-talent, not only due to its scalability proven by the modular elements. Also the different options for the input and output side make the REFUtower a flexible, easy to install energy centre. The modular system concept also features the benefit of redundancy: If one component fails, it is quickly replaced. Typical use cases are 48 V power supply as well as all off-grid supplies combined with photovoltaic modules, diesel generators or network supply. For uses with part-time power failure the REFUtower is the ideal solution to bridge this time.