Prof. Bülent Yeşilata is a professor and a senior researcher on renewable energy use, particularly on solar energy technologies. His general professional experience in mechanical engineering-related sectors is nearly 30 years; nearly 20 years of which is on solar energy systems, mostly on photovoltaic (PV) powered applications and solar heating-cooling. His research interests also include energy efficiency measures for buildings and industry. He has about 7 years of international experience in the USA, dealing with strong academic and research activities, including his Ph.D. education. He has consulted several private companies and government bodies on solar energy implementation strategies. He also consulted for UNDP-Turkey between 2009–2016, for long-term renewable energy and energy efficiency strategies and corresponding policies to be empowered in the GAP (Southeastern Project) Region of Turkey. He worked with the GIZ between 2019-2023 as a component coordinator of the project titled ‘Technical Assistance for Renewable Energy and Energy Efficiency Support for the Municipalities and Universities’. He is the founder and founding director of the GAP Renewable Energy and Energy Efficiency R&D Center at Harran University. He is the associate editor of the Solar Energy Journal, published by Elsevier.