Renewable energy is in transition stage in India. India believes in transition from fossil fuel to renewable energy. The energy sectors in which the researchers are working relates to Solar energy, Wind energy, Biomass, Pumped Hydro, Geothermal energy and Hybridized Energy. This book is a collection of research work carried out by the authors in the recent past with focus on geothermal energy. The authors has published several papers which are related to renewable energy sector over the years which are indexed in Scopus web portal. The authors experimented on renewable energy and has generated electricity for the first time in India using geothermal energy. The authors demonstrated space heating and cooling, Milk pasteurization, Green house, Honey processing and many other direct applications using geothermal energy. In the wind sector, the authors experimented on the turbines used in harvesting wind energy and converting the same into electrical energy. Authors demonstrated 10 KW wind turbine in Gujarat continuously running and generating electricity. They also ventured in hybridization of Solar energy with geothermal energy and the hybridized energy was feeded to an ORC for generation of electricity. At present authors are also working on Biomass conversion to Biofuel and conducting experiments on pumped hydro. Demonstration on renewable energy using the power of AI and ML is the need of the hour. Authors are writing algorithms for resource estimation of identified renewable energy prospects and categorizing the same according to PRMS nomenclature. Gravity, Magnetic, MT, Seismic methods were used to decipher the sub-surface prospects and allocate resource for the same