Kimolos is a small island located in the south-west of Cyclades group in the Aegean Sea, occupied by 900 inhabitants. It is a dry island suffering from water shortage, especially during the high demanding summer period. An existing desalination plant having a capacity of 600 m3/day covers large amount of the water needs. However, in order to ensure the island’s autonomy during the high demanding touristic period, the BriZE project proposes the installation of a new additional reverse osmosis desalination unit (RODU). This new RODU will also ensure the water supply of the island during the maintenance period of the existing unit, but also in the event of a failure. Additional important challenges of this project are the development and design of an innovative brine treatment system (BTS) that will mitigate the environmental footprint of the RODU and the partial replacement of the required electricity with a photovoltaic array (PV).