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 this book the concept of life-cycle
cost (LCC), calculations of present worth, annual life-cycle cost (ALCC)
and unit electricity cost are described. For the various designs of
photovoltaics, wind-power systems, biogas digestors and micro-hydropower
systems the unit electricity costs are calculated. Taking into account
that the renewable energy installations usually have less effect to the
environment, the concept of total cost of the energy is also described.