The purpose of the ECRES is to bring together researchers, engineers and natural scientists from all over the world, interested in the advances of all branches of renewable energy systems. Wind, solar, hydrogen, hydro-, geothermal, solar concentrating, fuel-cell, energy harvesting and other energy-related topics are welcome. Historically, past conferences were completed successfully in Alanya/Antalya (2012), Antalya (2013), Kemer/Antalya (2015), Istanbul (2016), Sarajevo (2017), Istanbul (2018), Madrid (2019), remote (2020), remote (2021), Istanbul (2022), Riga(2023), Mallorca(2024), and Perugia(2025). The last event had 63 attendee from 27 countries world-widely and the event has a growing interest among the scientists and technicians due to presentation of high quality, cutting-edge papers and after-conference journal publications. We call authors that all the accepted, presented and extended papers will be considered in Science Citation (SCI), E-SCI, SCOPUS and EBSCO-indexed journals with their extended versions after the peer-review process. The entire list of Special Issue journals will be announced after the conference. Besides, the conference proceedings including the conference version of the papers and abstracts will be delivered online from www.ecres.net just after the conference as in previous events