The report published by ENTSO delves into the impact of renewable hydrogen on the power system, emphasizing the role of electrification in hydrogen production. It builds on previous studies to explore the technical capabilities and challenges of electrolysers in providing grid system services. The report further investigates the integration of renewable hydrogen into power systems and electricity markets, focusing on the flexibility potential of electrolysers. It examines operational modes, market dynamics, and regulatory frameworks to enhance flexibility in hydrogen production. The study aims to create a more adaptable and power system-aware hydrogen production environment to meet the evolving market demands.