Energy storage can be utilised in a wide range of applications. The main types of applications covered by the chapters in the present volume include utility and other electrical power systems, conventional and renewable power generation, renewable energy sources, heat pumps, building heating and cooling and district energy systems. The ability of energy storage to facilitate the efficient, effective and economic operation of renewable energy systems is reinforced in this volume, with chapters focusing on using energy storage to improve solar power plants and other renewable energy applications. This book addresses both existing and potential future energy storage technologies and systems.