Overview
- Antora closed a $550 million Series C in late July 2026 that was co-led by G2 Venture Partners and Eclipse and included investors such as Decarbonization Partners, Lowercarbon, Breakthrough Energy and Ribbit Capital.
- The company says it will use the capital to boost factory output, build a second U.S. manufacturing hub, and speed large-scale project rollouts for customers that need always-on power.
- Commissioning is underway on a POET ethanol-facility project in South Dakota that uses more than 200 modular thermal batteries and totals about 5 gigawatt-hours of storage capacity.
- Antora’s systems store electricity as very high-temperature heat in insulated solid carbon blocks and then release that energy on demand as heat or, via thermophotovoltaics, as electricity, avoiding dependence on scarce battery minerals.
- One outlet reported a roughly $2.47 billion valuation for the round but Antora did not disclose valuation in all reports, highlighting differences in coverage even as the raise signals renewed investor appetite for cleantech scale-up.