Caldera’s Storage Boiler is shaping up to be a globalsolution for decarbonising industrial heat, turning low-cost renewableelectricity 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 companiescould help build a sustainable global business.
The Storage Boiler is an electric boiler with built-inthermal storage, allowing charging and heat delivery to be decoupled. Thisenables factories to use electricity when it is cheapest - whether from on-siterenewables or the grid - while still delivering steam on demand, providing aclean and cost-effective alternative to fossil fuel boilers.
At its core are modular “heat cells” made from a patentedcomposite of recycled aluminium and volcanic rock, enclosed within avacuum-insulated cover. The system is designed for global scale: components aremanufactured in factories and transported to site for rapid assembly. Even theinsulation cover can be installed in hours rather than days or weeks, avoidingthe large construction projects typical of conventional thermal storage.
This model also supports the circular economy, turninglow-grade recycled aluminium - including from end-of-life vehicles - into avaluable industrial heat storage material.
Japanese companies could play a key role in manufacturing keycomponents, such as heat cells and ancillary equipment, as well as delivering installationsacross Asia.

