This book is designed to serve as a textbook for courses on renewable energy technology tragetted at upper undergraduate or graduate students. This book can also be used as a core or supplementary text for courses in energy conservation and management and solar photo-voltaic design and application. This textbook covers the basic concepts of renewable energy resources, especially wind and solar energy. It contains 8 chapters covering all major renewable energy systems, resources, and related topics, as well as a brief introductory chapter on grid integration techniques in solar and wind energy systems. The book includes pedagogical features like examples and review questions and multiple choice questions to help the readers test their understanding. Reading lists, including web-based material, are included at the end of each chapter. The structure and pedagogy makes this book useful for self-study as well as for classroom use. The book can also be used as text for professional development courses for engineers employed in the energy industry.