This book contains electricity generation technology by Renewable Energy Sources (RES) especially solar and biomass. Solar Power Plants consists Photo-voltaic (PV) as well as Concentrating Type. Site selection solar power plants is also explained well. Biomass based Power Plants covers biochemical, thermochemical and agrochemical based power plants. Various caparisons, advantages, disadvantages and applications also staed in this book. This book is very helpful for study of Renewable Energy Sources (RES) especially solar and biomass.