This book describes various vital concepts and processes for designing a sustainable microgrid based in hybrid renewable energy sources. It gives the techniques to control the intermittency of renewable energy sources to supply a load centre. The chapter on optmization techniques for the designing of a microgrid gives the detail description of using state of art techniques to reduce the cost of microgrid development while keeping the demand-supply balance intact. Apart from the technical know-how, this book also gives the analysis of various regulatory policies and tariff structure for promoting such smart microgrids around the globe invoking the interest of consumers in accepting this newly developed technologies.