CRE had direct contributions in: Work Package 1 (WP1) on system level work for SRE integration, Work Package 2 (WP2) on frequency stabilization modelling, Work Package 5 (WP5) on validation testing of research results and Work Package 7 (WP7) responsible for maximizing the impact of RESERVE on science, industry and society. In addition, CRE has led Work Package 6 (WP6), representing the development of new harmonized grid codes, governance and regulatory issues arising from the grid integration of up to 100% RES.