The new stack produces around 100 kg of high-purity hydrogen per day, a 10-fold increase over Enapter’s previous Stack 25 generation. The units are designed to be combined into larger systems, supporting AEM electrolyzers with capacities of 100 MW and more.

The product is available 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.

The units are controlled by CoreKraft, Enapter’s energy management system. The system is designed to operate AEM electrolyzers and manage connected infrastructure including solar and wind plants, battery systems, and other hydrogen components.

Dr. Jürgen Laakmann, CEO of Enapter, commented: “The majority of electrolyser enquiries we receive are now in the megawatt range. In Asia in particular, demand is growing for plants with capacities reaching into the gigawatt range. With the Stack 250, we are ideally positioned for this scale-up. It enables us to realise pure AEM systems in the double-digit megawatt range. Even more importantly, however, it enables use in hybrid plants combining our AEM technology with alkaline electrolysis systems. This creates an entirely new class of industrial hydrogen factories with unprecedented efficiency in the use of green energy sources, at a scale comparable to conventional power plants. We are closing a scaling gap and can help replace conventional power plant concepts worldwide with renewable energy supply.”

Source:  Hydrogentechworld