Mediterranean Space of Technology and Innovation (MSTI) organizes in partnership of Moroccan Agency for Solar Energy (MASEN), Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ), and National Higher School of IT (ENSIAS) of Mohammed V University of Rabat-Morocco, the third Edition of the International Renewable and Sustainable Energy Conference (IRSEC’15). IRSEC’15 aims to provide an international forum to facilitate discussion and knowledge exchange of the state-of-the-art research findings and current and future challenges and opportunities related with all facets and aspects of renewable and sustainable energy. The target public of IRSEC’15 includes all interested people from academia, industry and government, particularly, researchers, policy-makers, engineers, PhD and Masters students and other specialists interested in all issues related to renewable and sustainable energy. The scope of IRSEC’15 covers a broad range of hot topics including renewable energy technologies, energy efficiency, green energy, climate change, sustainable energy systems and smart grid.