Renewable energy was identified as one of the alternatives to fossil fuels several years before. On one hand the developed countries are trying to maintain their standard of living while the developing countries are trying to solve their industrial, social and economical problems to increase their standard of living. A lot of Research and Development in the field of solar energy was carried out both in developing and developed countries and renewable energy is now utilized in domestic, agricultural and industrial sectors and also in the space.Time has now come when one should .seriously look into the problems and screen, select, adapt, and manage emerging renewable energy technologies like solar and wind energy for their use. Agriculture is one of the major occupations throughout the world, and using solar energy for solving various problems in agriculture will be beneficial for human kind. This book on Renewable Energy and Green Technology encompasses various topics for students, researchers for clear understanding of different topics as per ICAR Vth Dean's committee report.