Renewable energy refers to a type of energy that originates from natural sources, which can be replenished more quickly than their rate of consumption. Wind energy, hydroelectric power, solar energy and geothermal energy are examples of renewable energy sources. These energy sources can augment the production of electricity, thus lowering energy costs. The effectiveness of renewable energy is determined by the resources which are utilized. Some renewable energy sources, such as wind and sunlight, are more efficient and widely available than others, whereas renewable sources of energy such as geothermal energy are available in some selected places only. The projects involving renewable energy are usually large-scale and are appropriate for remote and rural areas. This book elucidates the concepts and innovative models around prospective developments with respect to renewable energy sources. It will also provide interesting topics for research, which interested readers can take up. For all readers who are interested in the engineering and technology of renewable energy sources, the studies included in this book will serve as an excellent guide to develop a comprehensive understanding.