Honeywell presented its Protonium software platform at the Honeywell User Group 2025 event in San Antonio, showcasing its capabilities in revolutionizing green hydrogen production. The software offers a comprehensive solution for the entire green hydrogen value chain, including design optimization and plant operations. Protonium's features, such as Concept Design Optimizer, Unified Control and Optimizer, and Hydrogen Electrolyzer Control System, enable users to enhance efficiency and reduce production costs. The software's advanced capabilities allow for effective management of power intermittency, optimization of energy mixes, and quick decision-making based on real-time data. By utilizing machine learning and digital twins, Protonium helps users find the optimal combination of equipment and functions for their specific process requirements. It also enables users to forecast energy needs and select the most cost-effective energy mix. Real-world collaboration with Ebara Elliot Energy has proven the software's effectiveness in addressing design challenges and optimizing green hydrogen production. The software's ability to perform what-if scenarios and provide recommendations based on data helps users reduce both the levelized cost of hydrogen (LCOH) and capital expenditure (CapEx). Protonium's role in addressing the challenges of green hydrogen production, such as renewable energy source fluctuations and regulatory uncertainties, highlights its importance in the transition to sustainable energy solutions.