Antora Energy is a U.S. company that makes factory-built thermal batteries, which store low-cost electricity as heat in blocks of solid carbon and deliver it as round-the-clock heat or power. It was founded in 2018 and makes its batteries at a gigafactory in San Jose, California. In May 2026 it commissioned a 5 GWh system at POET's Big Stone City biofuel plant in South Dakota.
Antora heats insulated blocks of solid carbon to glowing-hot temperatures using renewable or off-peak electricity. The stored heat is delivered to industrial processes, often as steam, or converted back to electricity with the company's thermophotovoltaic cells. Units are modular and the company says they scale from megawatts to gigawatts.
Source: antora.com, antora.com
Project Big Stone at POET's bioprocessing facility in Big Stone City, South Dakota, uses more than 200 Antora thermal batteries for 5 GWh of multi-day storage. It went from construction to delivering energy in under 12 months and was commissioned on May 19, 2026, under a long-term heat offtake agreement.
Source: antora.com
Antora targets always-on industrial operations, data centers and the grid, and offers a turnkey service from substation to steam header, from project development to operation.
Source: antora.com, antora.com
Antora was founded in 2018 by Andrew Ponec, Justin Briggs and David Bierman, according to Forbes. In February 2024 it raised a $150 million Series B led by Decarbonization Partners, a BlackRock and Temasek partnership, taking total funding above $230 million.
Source: forbes.com, antora.com
We found no Science Based Targets initiative entry for Antora (checked October 16, 2026). Its main climate relevance is replacing fossil-fired industrial heat with stored clean electricity.
Source: sciencebasedtargets.org
Antora is a long-duration storage option for sites that need heat as well as power. Data center buyers would evaluate it as firm on-site energy rather than as backup power.
| Field | Value | Source |
|---|---|---|
| Headquarters | Sunnyvale, California, USA | COMPANY WEBSITE antora.com |
| Founded | 2018, by Andrew Ponec, Justin Briggs and David Bierman | PUBLIC SOURCE forbes.com |
| Ownership | Private (venture-backed) | COMPANY WEBSITE antora.com |
| Employees | No data | NO DATA |
| Revenue (published) | No data | NO DATA |
| Operations and regions | No data | NO DATA |
| Customers and markets | No data | NO DATA |
| Facilities and capacity | 5 GWh Project Big Stone, commissioned May 2026 | COMPANY WEBSITE antora.com |
| Technologies | Thermal energy storage in solid carbon; thermophotovoltaic power output | COMPANY WEBSITE antora.com |
| Certifications and standards | No data | NO DATA |
| Partners and named customers | No data | NO DATA |
Only what the company or an official register publishes. Targets and commitments are labelled as such. No data means we found no public figure, not that none exists.
| Field | Value | Source |
|---|---|---|
| PUE (published) | No data | NO DATA |
| WUE (published) | No data | NO DATA |
| Renewable energy share | No data | NO DATA |
| SBTi target status | Not found in SBTi export (checked 2026-10-16) | PUBLIC SOURCE sciencebasedtargets.org |
It stores electricity as heat in insulated solid carbon blocks and releases it as industrial heat or, through thermophotovoltaic cells, as electricity. (antora.com)
A 5 GWh Antora thermal storage system at POET's Big Stone City, South Dakota plant, commissioned in May 2026. (antora.com)
Its 2024 Series B was led by Decarbonization Partners, with investors including Breakthrough Energy Ventures and Lowercarbon Capital. (antora.com)
Accessed Oct 24, 2026.
