On July 17 and 18, the follow-up meeting of the STES4D project took place at the Bilbao Engineering School. The objective of the project, in which ENEDI researchers participate, is to contribute to the deployment of thermal energy storage systems (TES) that are capable of managing heat and cold to save energy. At the meeting, researchers from the three centers that are part of STES4D (Euskal Herriko Unibertsitatea, Universidad de Zaragoza and CIEMAT) presented the progress made with the idea of generating debate and suggestions for improvements.