The Korea Institute of Machinery and Materials (KIMM) has made significant strides in revolutionizing greenhouse energy systems with the development of a hydrogen-fueled combined heat and power (CHP) system. This system, successfully tested in a 660-square-meter smart greenhouse in Jeonju, South Korea, showcases an innovative approach to energy independence and carbon reduction in agriculture. By combining PEM fuel cells, air-source heat pumps, solar thermal collectors, and adsorption chillers, the system efficiently generates electricity and reuses waste heat for cooling and heating. This integration of multiple renewable energy sources ensures stable energy production throughout different seasons and times of the day, reducing CO₂ emissions by over 50% and cutting operating costs by more than one-third compared to conventional greenhouse systems. The system's efficiency is further enhanced by an integrated control system that optimizes energy flows between different heat sources, maximizing energy stability and minimizing interdependence. Through real-time monitoring and control, the system ensures reliable energy production regardless of weather conditions. Moreover, the use of an adsorption chiller capable of producing chilled water at lower temperatures, along with storage of heat from the fuel cells and solar collectors in a thermal storage tank, allows for effective cooling during summer months. This comprehensive approach results in a 36.5% reduction in operating costs and a 58.1% decrease in CO₂ emissions compared to traditional greenhouse heat pump systems. The successful cultivation of tomatoes over six months in the demonstration greenhouse highlights the system's practical application and economic viability. Dr. Sang Min Lee, from KIMM, emphasized the system's suitability for Korea's fluctuating energy demands and its pioneering use of hydrogen fuel cells in smart farming. Overall, KIMM's innovation signifies a major step towards sustainable and efficient agriculture, showcasing the potential of combining renewable energy sources in greenhouse operations.