Hyundai Engineering & Construction (000720) will lead a South Korean national project to develop design technology for 100-megawatt-class water electrolysis plants, promoted by the Ministry of Climate, Environment and Energy. The consortium includes Hyundai Engineering, Hyundai Motor, Hanwha Global, Korea Midland Power, Mirae Standards Research Institute, Seoul National University and Korea University. The project aims to create a comprehensive design package for stable, large-scale hydrogen production despite fluctuations in renewable energy output, covering system and core process design through operational configuration and advancing the technology toward demonstration and commercialization. Hyundai E&C will develop the basic design package and assess economic feasibility, using artificial intelligence and dynamic simulation models to improve operational stability and reliability. The work, led by the HMG Construction Technology Research Institute, builds on the company's hydrogen production base construction project in Buan, North Jeolla Province, and its development of a 5-megawatt-class plant-type PEM water electrolysis system on Jeju Island. The research is intended to support standardization, improve EPC efficiency and strengthen Hyundai E&C's competitiveness in domestic and international large-scale green hydrogen projects.