"Renewable Energies: A Technical Review" is a book which contains experimental and theoretical topics for alternative sources of energy. There are numerous ways of harnessing energy from natural sources, the most widely in use being solar and wind energy. As more and more countries implement ways to utilize this untapped potential for power, a lot of houses, mine included, have begun to use renewable electrical energy by building their own homemade power systems. Because of the importance of topic, I tried to bring to gather of technical review from hundreds of industrial sites and reports to provide a different view of it and the reader can understand it more tangible. This book is a good guide line for electrical engineering students in their undergraduate period. This book includes 7 chapters and each chapter is organized to cover most important topic briefly.