The energy which is collected from renewable sources is termed as renewable energy. These resources are recharged through natural processes in a relatively short period of time. A few examples of such sources of renewable energy are tides, wind, sunlight and geothermal heat. There are primarily four areas where renewable energy provides energy. These are air and water heating/cooling, rural energy, transportation and most importantly electricity generation. Another source of renewable energy is bioenergy. Biomass can be converted into biofuel in order to power vehicles. Electrical energy storage is a significant part of renewable energy systems since it can store excess energy when production is high and return it to the grid when the production falls. The book studies, analyses and upholds the pillars of renewable energy and its utmost significance in modern times. Some of the diverse topics covered herein address the varied branches that fall under this category. This textbook is appropriate for students seeking detailed information in this area as well as for experts.