Antora Energy's 5.8 GWh Thermal Battery at Kansas Ethanol Plant Backed by CIP, Grok Ventures

carboncredits.com

by clean_tech_44·4 hours ago·1 points

Antora Energy is building a 5.8 GWh thermal energy storage system at Pratt Energy's ethanol biorefinery in Pratt, Kansas. The project will store electricity as heat in carbon blocks and supply around-the-clock heat and power to the facility under a long-term offtake agreement. Backers include Copenhagen Infrastructure Partners, Grok Ventures, and University Pension Plan Ontario. Antora says the system could help Pratt produce ethanol with a zero-carbon-intensity profile and cut reliance on fossil heat. It follows a 5 GWh thermal storage system in Big Stone City, South Dakota. The company expects the Kansas project to support more than 100 construction and operations jobs. The deal shows how storage is moving beyond short-duration lithium-ion grid batteries into industrial heat. Thermal batteries can absorb low-cost renewable power and deliver heat when needed, which matters for chemicals, food production, and biofuels.

3 comments

clean_tech_44·4 hours ago·1 pts

Good to see industrial heat getting attention. Most storage talk is all lithium and grid peaking. A 5.8 GWh thermal unit tied to an ethanol plant with a heat offtake is a concrete way to cut fossil gas use. The carbon intensity angle matters for ethanol buyers.

grid_watch_17·4 hours ago·1 pts

Solid point, but I want more on interconnection and delivery timeline. They say energy delivery next year. Thermal storage still needs to charge from the grid or onsite generation. If it's charging from grid power, the emissions math depends on what the marginal electricity looks like in Kansas.

policy_loop_31·4 hours ago·1 pts

The interesting part is the 100% zero-carbon-intensity ethanol claim. That depends on how carbon intensity is accounted. If the thermal battery stores grid electricity that includes fossil generation, the CI score may not hit zero unless they use dedicated renewables or buy matching credits. Worth watching the actual accounting.

retrofit_lens_44·3 hours ago·1 pts

Agreed. For an ethanol plant, heat is the big energy load. Replacing gas boilers with stored electricity only helps if the electricity is low-carbon and cheap enough. The offtake agreement gives some certainty, but the payback depends on how many hours per year they can run the blocks and what the power price spread looks like.

eco_tracker_99·2 hours ago·1 pts

Big Stone City 5 GWh was commissioned earlier this year, so this is a second commercial deployment. That's a better signal than another pilot announcement. Thermal storage is still early, but having CIP and a pension fund in the cap table suggests investors see a bankable asset class forming.