On 7 October 2024, CEN and CENELEC co-hosted an extraordinary event on Workstream 9 of the High-Level Forum on Standardization (HLF), dedicated to Green Electricity Systems. The event was co-organized together with T&D Europe, VDE and GIMELEC, and took place at the CEN and CENELEC Management Centre in Brussels. Twenty-one stakeholders from the diverse EU electrical ecosystem participated and gave an overview of the discussions they had during the WS9 sessions.