A crystalline form of carbon, graphite has high storage capacity and thermal and electrical conductivity. It doesn’t melt, but sublimates at 3,650ºC, and its tensile strength actually increases with temperature.

For all the benefits, graphite’s amazing qualities are not easily harnessed for thermal storage. Through a rigorous iterative process of prototyping, lab tests, modeling, and 3rd party review, Kelvin’s engineering team has managed to crack graphite’s code and design a highly scalable system architecture.