Abstract
<jats:p>The rapid development of blockchain-based decentralized energy trading has introduced peer-to-peer (P2P) market models that challenge traditional centralized electricity regulation. Existing energy regulatory frameworks, designed for vertically integrated utility systems, often lack the flexibility to accommodate prosumers, smart contracts, and automated transactions. This book examines regulatory sandboxes as adaptive legal frameworks for testing blockchain-driven decentralized energy trading models under controlled regulatory conditions. It analyzes how sandboxes enable experimentation with innovative energy business models while safeguarding consumer protection, grid reliability, data privacy, and market integrity. Through legal and policy-oriented analysis and comparative international case studies, the book explores sandbox design principles and key regulatory challenges across energy law, data protection, competition law, and liability regimes. The findings show that regulatory sandboxes reduce legal uncertainty and support evidence-based regulatory development for markets.</jats:p>