Agricultural engineering is comparatively a different and new branch among from all the disciplines. A number od textbook are available on renewable energy sources. This book "Quick revision on renewable energy sources" is designed to quick and important facts about od renewable energy sources. This book is written for the students of agricultural engineering and master degree in renewable energy students. This book will be helpful for the students preparing for GATE, JRN, NET, ARS, Agricultural MPSC and MCAER entrance examination. It will also useful for the students who work or having interest in renewable energy fields such as industry, government and research institutes. This book is divided in seven sections, first and seconds sections covers about the renewable energy sources with emphasis on status of renewable energy in India. Third, fourth, fifth section covers objectives, farmulae's, example and glossary of renewable energy sources. A Section sixth and seventh covers institutions and resources in renewable energy sources and important things related to renewable energy sources. We acknowledge with thanks all the persons who helped us during the compilation of the manuscript and those who indirectly helped us to bring this book in the reader's hand. Valuable suggestions from the students and readers are always welcome