Antora Plans 5.8 GWh Thermal Storage Project at Pratt, Kansas Biorefinery
Antora Energy plans a 5.8 gigawatt-hour multiday thermal energy storage project at the Pratt Energy biorefinery in Pratt, Kansas, OK Energy Today reports, citing the Hutchinson News.
Market Impact
The California company describes the project as one of the largest battery storage systems in the world. Pratt Energy, which produces ethanol for transportation fuel plus co-products used for biodiesel and animal feed, will buy “competitively priced, around-the-clock energy” from the system under a long-term heat offtake agreement. The announcement says the project should use little additional water beyond existing operations and should not raise noise levels for neighboring properties.
Copenhagen Infrastructure Partners led the third-party equity financing. Grok Ventures and University Pension Plan Ontario also took part. The source gives no total project cost, construction start date or completion date. The announcement projects more than 100 construction and operations jobs.
Antora’s nearest precedent is Project Big Stone, a 5 gigawatt-hour system at POET’s bioprocessing plant in Big Stone City, South Dakota. According to the source, it went from an empty lot to delivering energy in under 12 months, with full completion expected later this year. It deploys more than 200 Antora thermal batteries under a long-term offtake agreement with POET.
What It Means for Subcontractors
- No bid stage exists yet. The source names no EPC, general contractor or prequalification process for Pratt. Any claim about who is hiring or when a portal opens is unsupported. The first gate to watch is an EPC or construction manager announcement from Antora or Pratt Energy, and no date has been given.
- Big Stone is the best indicator of scope (inference, not sourced). The Big Stone project uses more than 200 thermal batteries and was built in under 12 months. If Pratt follows that approach, expect repeated module installation on a compressed schedule. That would favor civil and site-prep crews with fast foundation and grading capacity, plus electrical crews able to run repeated terminations. Subs who worked Big Stone may have an advantage, though nothing in the announcement says Antora will favor prior contractors.
- Heat delivery may add mechanical work (inference, not sourced). The offtake is for heat to a biorefinery, not just electricity. Pipefitters, insulation crews and mechanical contractors with industrial process-plant experience may see scope that a typical grid-tied battery site would not have. The source does not describe the interconnection or piping design.
- Local labor is part of the pitch. The announcement cites more than 100 construction and operations jobs in Pratt. Kansas-based civil, electrical and craft-labor firms should have local-hire arguments, though the source gives no split between construction and permanent roles.
- Use Big Stone as a pursuit channel. That project completes later this year. Subs that want Pratt work can ask Antora about its Big Stone contractor roster and handoff timing, then position for the same packages. No Pratt packages have been announced.
