Fourth Power, an MIT spinout founded by Professor Asegun Henry, is developing thermal batteries that store electricity as heat at temperatures up to 2,400C using carbon bricks and molten tin. The company aims to provide 10-100 hours of grid-scale storage at a lower cost than lithium-ion batteries. A 1MWh demonstration unit is planned for later this year. https://news.mit.edu/2026/turning-extreme-heat-large-scale-energy-storage-0318 #Tech #Startup #News #DeepTech #FourthPower

Fourth Power, an MIT-founded startup, is building thermal batteries that store energy as heat. The company uses molten metal to transport heat stored in carbon bricks, converting it to electricity via thermophotovoltaic cells. Targeting data centers and grid storage, the system provides 10-100 hours of electricity at lower costs than lithium-ion. https://news.mit.edu/2026/turning-extreme-heat-large-scale-energy-storage-0318 #Tech #Startup #News #DeepTech #FourthPower