Renewable energy is naturally replenished and is derived from inexhaustible natural sources. The discipline of renewable energy primarily includes biofuel, hydropower, geothermal, solar and wind energy. Renewable energy replaces conventional fuels and provides a solution to current environmental challenges such as the clean energy issues and greenhouse effect. Rapid development and technological diversification of energy resources have resulted in economic and environmental benefits. This book attempts to foster knowledge on various renewable energy systems and components. It compiles researches on different economic strategies regarding renewable energy sources and systems. The book aims to help students, researchers and scientists.