Hussein A. Kazem obtained his BSc and MSc in electrical engineering from the University of Technology, Iraq, as well as a Ph.D. from Newcastle University, UK. He is presently an Associate Professor in the Faculty of Engineering, Sohar University, Oman. He has been involved in the field of solar and renewable energy for more than twenty years. His main contributions are in standalone and grid-connected photovoltaic systems, solar radiation and systems modeling, solar water-heating systems, solar desalination, combined photovoltaic thermal or hybrid collector, and solar/wind hybrid systems. He has published seven books and over 200 research papers in journals and conferences. He is an editor and reviewer of many international journals. He has delivered keynotes speeches at national and international conferences on renewable energy. He is a winner of some national and international awards. and He has completed some national and international research grants.