Gates-backed Fourth Power pilots thermal storage based on TPV cells
Fourth Power, backed by Bill Gates' venture firm, has developed high-density thermal energy storage (TES) based on thermophotovoltaic (TPV) cells. The tech, which is reportedly 10 times cheaper than lithium-ion batteries, is based on the US company’s patented liquid metal heat transfer system. While TES has struggled to take off to date, US-based Fourth Power is taking a new technological approach to some of the cost and scale challenges. Its high-density TES system is based on its Guinness