This book provides comprehensive coverage of EU energy law in practice, evaluating the effectiveness of the Third Energy Package, the rise and importance of national and EU renewable energy measures in electricity markets, interconnection and infrastructure aspects of the electricity and gas markets. The national reports take into account the legal and institutional diversity among the Member States, drawing on the experience of prominent energy lawyers to provide analyses of their own national experiences. This book includes an overview of the Energy Union, the institutional framework of regulation, a comprehensive review of how things have changed as a result of the various energy packages, state aid decisions and Energy Charter and European Court of Justice case law.