POET and Antora Energy commissison 5 GWh thermal storage system

May 20, 2026 |

In South Dakota, POET and Antora Energy announced the commissioning of Antora’s 5 gigawatt-hour, multi-day thermal energy storage system at POET’s Big Stone City, South Dakota bioprocessing facility.

The project advanced from initial construction to delivering energy in under 12 months and will be fully operational later this year. Upon completion, it will rank among the world’s largest energy storage projects by capacity—delivered at the speed required to meet surging domestic energy demand.

The project uses Antora’s technology to improve efficiency and lower costs at POET Bioprocessing – Big Stone, helping produce homegrown fuel that reduces harmful emissions and lowers prices at the pump. The significant investment in POET’s facility has created and supported over 300 manufacturing and construction jobs in rural South Dakota and at Antora’s recently expanded San Jose, California gigafactory, where all of the company’s thermal batteries are made.

Antora’s system provides POET with competitively priced, around-the-clock energy under a long-term heat offtake agreement, enabling the plant to increase bioethanol production and create tens of millions of dollars annually in new market opportunities for South Dakota farmers.

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Category: Fuels

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