Nicola Femia is a full professor of electrotechnics at the University of Salerno, where he teaches circuit theory and power electronics and leads the Power Electronics and Renewable Sources Laboratory. He has been responsible for research and education projects in collaboration with several industries, including Magnetek, National Semiconductor, STMicroelectronics, PowerOne, and Texas Instruments. He is co-author of more than 140 scientific papers published in international journals and in the proceedings of international conferences. He is co-author of five patents regarding control techniques and power converters for photovoltaic applications. Giovanni Petrone is an assistant professor in the Department of Electronic Engineering and Computer Science at the University of Salerno, where he teaches electrotechnics and power electronic circuits for renewable energy sources. He is involved in several research projects with international companies and institutions and has also assumed responsibility for some Italian research projects supported by public funds. He is co-author of five patents and several scientific papers published in international journals and in the proceedings of international symposia. Giovanni Spagnuolo is an associate professor of electrical engineering at the University of Salerno. He is the project leader of two European projects Leonardo Da Vinci and FP7 and one PRIN 2008 project financed by the Italian Ministry of University and of Scientific and Technological Research (MURST), and he is the coordinator of research contracts financed by National Semiconductors Corporation, Matrix S.r.l., and Bitron Industrie S.p.A. He is co-author of six patents and the author or co-author of more than 140 papers published in international journals and in the proceedings of international conferences. He is editor of the IEEE Journal of Photovoltaics and associate editor of the IEEE Transactions on Industrial Electronics. Massimo Vitelli is a full professor in the Department of Industrial and Information Engineering at the Second University of Naples, where he teaches electrotechnics and power electronics. He has been engaged in a number of scientific national projects financed by the Italian Ministry of University and of Scientific and Technological Research (MURST) and by the National Science Foundation (CNR) and in many research contracts with industries. He is co-author of six national and international patents and of about 180 papers published in scientific journals or in international conference proceedings.