To secure a brighter future, advancing renewable energy systems is crucial. This book explores some of the latest developments in renewable energy technologies, objectively evaluating their costs and policies while addressing the outstanding challenges and proposing solutions. The book also discusses essential energy differences between urban and rural settings. With case studies and regional perspectives, it outlines a path forward for clean energy, providing essential reading for postgraduate students, researchers, and policymakers in the field. Part of IOP Series in Renewable and Sustainable Power.