A development relevant to building material chemistry: BASF Construction Chemicals is testing a pilot plant for hydrogen production using Solid Oxide Electrolysis Cell (SOEC) technology in the Ludwigshafen industrial park. Solid oxide electrolysis operates at temperatures between 700 and 850 °C and achieves efficiencies of up to 85 percent – significantly higher than alkaline electrolysis (60–70 %). For the energy-intensive production of additives, binders, and polymer components, green hydrogen could potentially replace fossil fuels in the future and significantly improve the CO₂ balance of building materials such as concrete, mortars, and coatings. The test operation is intended to provide insights into scalability and integration into existing production processes.