<aside> 💡
Based in Sulzbach, Germany, Kraftblock GmbH (established in 2021) is revolutionizing the most challenging sector of the energy transition: industrial process heat—the "elephant in the room" responsible for a vast portion of global emissions.
The company's breakthrough lies in its "Thermal Battery," capable of storing heat at 1,300°C for up to two weeks with minimal loss. Its storage medium is upcycled from up to 85% industrial waste, such as steel slag, transformed via advanced nanoparticle composite research into a high-performance material. Crucially, it achieves a staggering 98% efficiency when converting electricity to heat using resistive heaters, with a round-trip efficiency exceeding 95%. Unlike chemical batteries, it requires no rare earth minerals and has been tested for over 15,000 cycles (40+ years) with zero degradation or deformation, offering a cost-effective, circular solution for heavy industries.
By upgrading conventional "gas-fired boilers" into "thermal batteries" that store renewable energy, Kraftblock allows industries to switch their heat source entirely. This complete switch is projected to reduce plant emissions by up to 98%. This visionary approach has attracted global partners, including Mitsubishi Heavy Industries and Siemens, and secured backing from prominent investors like Shell Ventures. Kraftblock’s technology represents a fundamental shift in industrial infrastructure, moving from fossil fuel dependence to a sustainable "energy vault" system. Guided by a leadership committed to planetary restoration, Kraftblock is setting a new standard for a climate-neutral civilization. （AS)
</aside>
Kraftblock | Green heat for industries
This cleantech startup put a novel heat battery in a giant steel mill
How Recycled Steel Slag Can Save Money And The Planet
Kraftblock secures funds for thermal energy storage technology | Electronics360
European utilities choose thermal energy storage solutions from Brenmiller and Kraftblock