Caldera’s Storage Boiler is shaping up to be a global solution for decarbonising industrial heat, turning low-cost renewable electricity into reliable process heat in the 100–200 °C range.
In this interview with Gesher Times, our CCO Daniel Kirk explains the unique features of the Caldera system and how Japanese companies could help build a sustainable global business.
The Storage Boiler is an electric boiler with built-in thermal storage, allowing charging and heat delivery to be decoupled. This enables factories to use electricity when it is cheapest, whether from on-site renewables or the grid, while still delivering steam on demand, providing a clean and cost-effective alternative to fossil fuel boilers.
At its core are modular “heat cells” made from a patented composite of recycled aluminium and volcanic rock, enclosed within a vacuum-insulated cover. The system is designed for global scale: components are manufactured in factories and transported to site for rapid assembly. Even the insulation cover can be installed in hours rather than days or weeks, avoiding the large construction projects typical of conventional thermal storage.
This model also supports the circular economy, turning low-grade recycled aluminium, including from end-of-life vehicles, into a valuable industrial heat storage material.
Japanese companies could play a key role in manufacturing key components, such as heat cells and ancillary equipment, as well as delivering installations across Asia.
