AMBARtec Receives Design Approval for Hydrogen Storage System

The testing institute LRQA Germany has reviewed and approved the design of AMBARtec’s H2compact 6000 hydrogen storage system. AMBARtec develops iron oxide–based hydrogen storage solutions that enable safe, flexible, and logistically well-integrated storage and transport of hydrogen.

Building on this approval, AMBARtec and Purem by Eberspächer now plan to jointly prepare for industrial-scale production. Series manufacturing is set to take place at Purem by Eberspächer’s site in Wilsdruff, Saxony. A modular production concept is currently being developed there to allow large-scale manufacturing of the pressure containers. In parallel, the company is providing targeted training to employees to meet the high requirements, particularly in welding technology.

The partnership between AMBARtec and Purem by Eberspächer has been in place since early 2025. From the outset, Purem by Eberspächer was involved in the development and design of the containers. Beyond container production, the collaboration also aims to strengthen networking within the hydrogen industry, including in the steel sector. The concept of so-called silver hydrogen also plays a role, in which hydrogen is recovered and reused from industrial exhaust streams.

The H2compact 6000 Plus has a storage capacity of up to 800 kilograms of hydrogen, corresponding to approximately 26 megawatt-hours. The system is housed in a standardized 20-foot container and can be transported using existing logistics infrastructure by truck, rail, or ship. No adaptations to the infrastructure are required, nor are extensive approval procedures under the Federal Immission Control Act or the Major Accidents Ordinance. Operational tests have also confirmed the cycle stability of the iron oxide–based storage material, making long-term use feasible.

The first containers are expected to be delivered to customers next year. In a subsequent step, production is planned to be gradually scaled up to several hundred units per year. In the long term, the iron oxide–based storage systems also open up additional application fields: in addition to stationary energy storage, hydrogen transport, and industrial applications, a material reuse of the iron oxide nuggets after use is envisaged, for example as a soil improver in agriculture.