Organised by the SSTAR project, this workshop presented the key outcomes on high-voltage Solid-State Transformers (SSTs) and their contribution to future energy systems. SSTAR’s mission is to integrate SSTs as innovative and sustainable technologies into traditional energy infrastructures, enhancing performance and enabling wider applications. As the project nears completion, the workshop is designed not only to share results but also to gather feedback through interactive discussions and exploring the potential of SSTs in the energy transition.