Energy Communities: Fundamentals, Technologies, and Emerging Trends provides a comprehensive guide to understanding, designing, and optimizing energy communities, with step-by-step breakdowns of the technical, economic, and practical principles at play. This book opens by examining the key agents, models, and impacts of energy communities, including infrastructure, generation, and storage technologies. Part II delves into economic considerations, discussing legislative frameworks, barriers, greenwashing risks, and support mechanisms. Part III focuses on complex practical arrangements, providing cutting-edge, detailed case studies examining collective assets and cost-sharing mechanisms. Finally, Part IV addresses energy management and dispatch, highlighting demand and storage technologies utilizing deep learning, big data, and digital twin technology. With its holistic perspective, blending theoretical insights with practical blueprints and real-world case studies, Energy Communities: Fundamentals, Technologies, and Emerging Trends is an essential resource for students, engineers, and academics designing decentralized energy systems to enable renewable energy integration, and future-proof the power infrastructure.