Dr Pedro Pérez-Higueras is professor at the University of Jaen (Spain) and he researches since more than 20 years in the field of photovoltaic energy. In the last seven years, he has worked in High Concentrator Photovoltaics Technology and his research interest covers the developing, characterization and modelling of concentrator photovoltaic devices and optimal design of power plants. He has collaborated in more than 30 R&D projects with different companies and institutions and he has published more than 100 papers in the most prestigious peer-review journals and congresses related to solar energy. Dr. Eduardo F. Fernández has worked more than 10 years in the field of solar energy and Concentrator Photovoltaics. During this time he has been involved in research projects in prestigious research institutes, universities and private companies. His research interest covers the developing, characterization and modelling of concentrator photovoltaic devices and systems. He has been granted a project funded by the Spanish/Galician government and European Union for developing high concentrator photovoltaic modules based on new concepts and configurations between the optical elements and high efficiency solar cells. Recently, he has received the Juan de la Cierva fellowship, the most prestigious grant for young researchers of the Spanish government. He has published numerous papers in the most prestigious peer-review journals and congresses related to high concentrato r photovoltaic technology.