Big Stone City Thermal Battery Project
Sector: Geothermal • Location: Big Stone City, South Dakota, United States
Source: Energies Media
Antora Energy has built the world's largest thermal battery, a 5-gigawatt-hour system that stores wind energy as white-hot carbon blocks to provide heat to a South Dakota ethanol plant. The system heats solid carbon blocks to temperatures near 2,400°C and pipes steam to the neighboring ethanol plant, replacing heat previously sourced from a coal plant. The project was built in under a year and is
- Status
- Closed
- Sector
- Geothermal, Energy Storage, Wind
- Location
- Big Stone City, South Dakota, United States of America
- Updated
- 22 Jul 2026
- Source
- Energies Media
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Project Information
Participants
| Not available for this record. |
Status
Original status | completed |
Taiyo status | Closed |
Taiyo last update | 2026-07-22 |
Contact
| Not available for this record. |
Description
Description | Antora Energy has built the world's largest thermal battery, a 5-gigawatt-hour system that stores wind energy as white-hot carbon blocks to provide heat to a South Dakota ethanol plant. The system heats solid carbon blocks to temperatures near 2,400°C and pipes steam to the neighboring ethanol plant, replacing heat previously sourced from a coal plant. The project was built in under a year and is jointly owned by Antora and Grok Ventures, with a long-term heat offtake agreement with Poet. |
Original sector | Energy |
Budget |
Location
Country | United States of America (USA) |
State | South Dakota |
City | Big Stone City |
Source
Source | Energies Media |
URL |
More Details
Record type | Project |
Sector | Geothermal, Energy Storage, Wind |
Article published date | 2026-06-01 |
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