Fraunhofer specialists have made significant progress in the production of green hydrogen through solar energy with the development of a self-sufficient tandem module. This breakthrough innovation has the potential to replace fossil fuels and contribute to reducing carbon emissions. The tandem PEC module enables direct solar hydrogen generation, offering a flexible and efficient solution for transforming industrial processes to have a lower climate impact. By optimizing semiconductor materials and coating methods, the Fraunhofer scientists have achieved high-purity layers that increase the hydrogen yield. The successful field tests have demonstrated the stability and smooth operation of the module and interconnections. Looking ahead, the Fraunhofer teams plan to continue their collaborative efforts in a follow-up project and further develop the solution in partnership with the private sector. This advancement in solar-generated green hydrogen production holds promise for a sustainable and efficient energy transition, emphasizing the importance of innovative technologies in addressing climate challenges.