Fourth Power

Electrified Thermal

This company develops thermal batteries using conductive firebricks to provide zero-carbon, high-temperature heat for heavy industries like steel, cement and chemicals.

Antora

This company manufactures thermal batteries that store renewable electricity as heat to provide zero-carbon energy for industrial facilities, data centres and the grid.

Antora Energy

The company manufactures thermal energy storage batteries to provide zero-emission heat and power for industrial customers and data centres.

Form Energy

This company develops rechargeable iron-air batteries that provide multi-day energy storage for electric grid operators and utility providers.

Calectra

The company develops thermal energy storage systems that provide high-temperature, emission-free process heat for heavy industry manufacturers like steel and cement producers.

Epyr

This company develops thermal energy storage systems that convert renewable electricity into high-temperature heat for industrial facilities to replace fossil fuels.

Kraftblock

This company produces high-temperature thermal energy storage systems for industrial customers in sectors including steel, glass, food, and chemical manufacturing.

Cache Energy

This company develops thermochemical long-duration energy storage and heat electrification systems for industrial applications, global infrastructure and military use.