Panagiotis Lykas has a PhD in the development of energy production and storage systems from renewable sources from the School of Mechanical Engineering of the National Technical University of Athens (NTUA), Athens, Greece. He has an integrated master's degree in mechanical engineering, specialising in energy and thermal engineering from the same school. As a post-doctoral researcher, he participates in research projects at NTUA. At the same time, he is an associate researcher at the Chemical Process and Energy Resources Institute (CPERI) of the Centre for Research & Technology Hellas (CERTH), Athens, Greece, where he participates in research projects. His academic and research interests include renewable energy systems, thermal energy storage, thermodynamic cycles, heat pumps, solar energy systems, hydrogen, Carnot batteries, and industrial waste heat recovery systems. He has published articles in scientific journals, proceedings of international conferences, and book chapters. Finally, he serves as a guest editor for MDPI journals and a reviewer for Elsevier, MDPI, Taylor & Francis, and Springer journals.