EMPOWER addresses a critical gap in Brussels' energy transition: while energy sharing and energy communities offer significant potential for decarbonisation and citizen engagement, municipalities face substantial barriers to participation — administrative complexity, public procurement rules, unclear business models, and challenges in making rooftops available. The project brings together three Brussels municipalities (City of Brussels, Schaerbeek, Ixelles) with cooperative Brupower and expert organisation Energie Commune to identify barriers, develop solutions through pilot cases, and create a replicable toolkit enabling other Brussels municipalities to establish energy communities.