Renewable energy is a form of energy that is derived from renewable resources. These are naturally replenished on human time scales. Some common forms of renewable energy include wind, rain, sunlight tides, geothermal heat and waves. Electricity generation, rural energy services and transportation are some important areas where renewable energy is utilized. The most common types of renewable energy are solar energy, hydropower and wind energy. Solar energy is a radiant light and heat from the sun which is utilized for future use using a range of technologies such as solar heating, solar thermal energy, photovoltaics, solar architecture, etc. Hydropower is the power which is derived from falling water or fast running water. It is later utilized for useful purposes such as irrigation, and operation of various mechanical devices like gristmills, sawmills and textile mills. Wind energy on the other hand uses airflow with the help of wind turbine which helps in generating mechanical power to turn electric generators. It may also be applied to other areas like milling or pumping. This book contains some path-breaking studies in the field of renewable energy. The topics included in this book on renewable energy are of utmost significance and bound to provide incredible insights to readers. Researchers and students in this field will be assisted by this book.