A powerful anion exchange membrane (AEM) electrolyzer stack developed by Germany-based EnapterAG supports hydrogen production in the multi-megawatt range. The Stack 250 can produce around 100 kg/day of high-purity hydrogen and is easily combined into larger units.

The system is considered ideal for large-scale hydrogen plants in sectors including steel, cement, ammonia and aluminum production, as well as hydrogen-based power plants and large-scale power-to-heat applications. In addition to containerized systems, skid-mounted models for indoor installation are also feasible.

The modular design allows each stack in a large-scale plant to be ramped up or down independently. Enapter said this supports more efficient use of variable renewable power inputs from sources such as solar and wind. The company also said large-scale plants of this kind are currently being planned, particularly in Asia.

Stack 250 is also intended for hybrid plants above 100 MW and up to the gigawatt range. In those systems, Enapter’s AEM stacks operate when renewable electricity is insufficient for full-load operation, while alkaline electrolysis systems are added when full-load conditions are reached. According to the company, this configuration enables efficient hydrogen production across changing levels of available renewable power.