Rolls-Royce has achieved H2 readiness certification from TÜV Süd for its mtu Series 4000 FNER/FV gas engines, marking a significant step in their commitment to hydrogen technology. This certification ensures that the engines are prepared for future use with hydrogen, allowing for conversion to operate with hydrogen admixtures of up to 25% or even 100%. The CO2-free operation of these engines when using green hydrogen aligns with Rolls-Royce's strategy of lower carbon emissions. The certification enhances investment security for customers, assuring them of the compatibility with hydrogen as a fuel in the future. The upcoming delivery of the first 1 MW 100% hydrogen CHP plant in Duisburg further showcases Rolls-Royce's dedication to CO2-neutral energy solutions. Additionally, Rolls-Royce is actively working on the next generation of hydrogen engines in collaboration with a consortium to develop highly efficient hydrogen combustion engines for CHP plants. The article also highlights the German government's support for gas-fired power plants in the energy transition, promoting the development of CO2-free hydrogen engine power plants as key components of the renewable energy landscape. This strategic focus aims to balance the fluctuations in wind and solar power generation while reducing CO2 emissions. The progress made by Rolls-Royce in advancing hydrogen technology signifies a positive step towards sustainable energy solutions.