This book is compiled jointly by the Tajikistan and Pakistani scientists based on the result of research and various designs of photovoltaics, wind-power systems, biogas digestors and micro-hydropower systems. The economics of these renewable energy installations that are widespread in different countries in the world for the last decade are described and highlighted. Authors believe that this book will provide understanding of the basic points of the economics of the renewable energy installations and will be a useful source for students, researchers and professionals. In particular, in...