The European Union (EU) has set ambitious targets and policy objectives to move towards a society featured by a high Renewable Energy Sources (RES) penetration, at least 32% share, and low GreenHouse Gas (GHG) emission, at least a 40% cut, by 2030. In the forthcoming energy transition, an increasingly key role is expected to be played by Energy Communities (ECs): a legal entity where different actors satisfy their energy needs by cooperating in the energy production, transmission and consumption. These medium-large scale installations help also to bring several benefits to the population, achieving unfeasible results on individual basis. ECs aim also at decarbonizing energy systems by promoting the distributed power generation and increasing citizens awareness, as they are actively involved in the decision-making processes.