Energy Communities explores core potential systemic benefits and costs in engaging consumers into communities, particularly relating to energy transition. The book evaluates the conditions under which energy communities might be regarded as customer-centered, market-driven and welfare-enhancing. The book also reviews the issue of prevalence and sustainability of energy communities and whether these features are likely to change as opportunities for distributed energy grow. Sections cover the identification of welfare considerations for citizens and for society on a local and national level, and from social, economic and ecological perspectives, while also considering different community designs and evolving business models. Defines and conceptualizes the energy community for the current generation of researchers and practitioners facing the energy transition Explores the main benefits and challenges in forming energy communities and to what extent they are welfare-enhancing Examines under what terms, conditions, regulations or policies energy communities can be beneficially and successfully organized and why Reviews the combination of business models and forms of organization which are conducive to economic feasibility and the commercial success of energy communities