From a brick at MIT to commercial-scale heat in heavy industry — replacing the world’s fossil-fuel burners with the cheapest, cleanest, hottest electric heat ever built.
Industry runs on fire. Boilers, furnaces, and kilns burn fossil fuels to deliver the heat that makes steel, cement, chemicals, and glass — and they account for a quarter of global greenhouse emissions.
The Joule Hive™ Thermal Battery replaces those burners with electrically conductive firebricks: a deceptively simple way to store cheap, intermittent electricity as 1,800°C heat, on demand, around the clock.
The firebrick has been the workhorse insulator of industry since the dawn of the Industrial Revolution. We rebuilt it.
Across almost a decade of development in the MIT lab, we engineered a firebrick that conducts electricity — remaining chemically stable in air and other atmospheres at temperatures hot enough to melt steel.
The result is the first heating element that can convert electricity to 1,800°C at industrial scale, and store it cost-effectively at >98% efficiency. Cheap off-peak electricity becomes dispatchable heat — on demand, around the clock, cheaper than natural gas.
Nuclear engineers, bricklayers, entrepreneurs, parents, dreamers. The day-in, day-out passion to electrify another boiler, furnace, or kiln — and replace plumes of smoke with clean, quiet systems that power a clean economy.
If you share the mission — bring zero-carbon industrial heat to global scale, cheaper than natural gas — let’s talk. We’re hiring across engineering, manufacturing, commercial, and finance.