This thesis aims to explore Renewable Energy Communities (RECs) from multiple perspectives, including technical, regulatory, economic, and performance aspects. The main objective is to develop an accurate simulation model that reflects how RECs function within the Italian context, particularly focusing on the integration of renewable energy technologies and their potential in different regions. To achieve this, the study is divided into several key components: 1.??Energy Production Profiles: Using simulation tools like PVsyst, PVGIS, and GWA, the thesis generates detailed hourly energy production profiles for three major renewable sources—solar photovoltaic (PV), wind, and hydroelectric power. These profiles are based on varying geographic conditions in Italy's North, Central, South, and Island regions.