The SOLARIZE project aims to enhance the long-term sustainability of EU-SOLARIS ERIC by achieving several key objectives: expanding its membership; increasing the involvement of R&D institutes and national funding bodies at the National Nodes; educating new researchers on the proper use of research infrastructures (RIs); strengthening international cooperation and science diplomacy; improving managerial skills within the organization; fostering collaboration between industrial stakeholders and CST researchers; raising awareness about other potential applications of CST RIs, such as industrial process heat; developing new standards and testing protocols; creating the first e-infrastructure providing remote or virtual access to R&D centers; exploring ways to combine CST with other energy sources; and, lastly, promoting the greening of technologies and methodologies used by CST RIs.