Kane County hears AES presentation on adding battery storage to Glen Canyon Solar; commissioners defer vote

At the Kane County Commission meeting on Nov. 12, county officials heard a technical presentation from AES on a revised Glen Canyon Solar project that would pair a 95-megawatt solar array with a 95-megawatt, four-hour-duration battery system. Brady Hewitson, introduced as the project lead, told the commission the company paused work after a prior power-purchase agreement (PPA) was terminated because transmission capacity was not available. Hewitson said adding battery storage allows the project to time-shift generation and reconnect to the grid without building new transmission.

Hewitson described the proposal as three solar array fields with a battery area of roughly 10 acres containing about 64 containerized battery units. He said the battery would charge for four hours and discharge for about four hours to meet evening peak demand, and that best-case construction would begin in May 2025 with project completion by the end of 2026. The company estimated total capital investment near $325 million and said batteries increased project cost substantially; AES said battery systems can be roughly comparable in cost to the solar array.

Commissioners pressed the developer on safety and operations. AES engineers described containerized battery modules with HVAC, remote monitoring, and an automatic chemical suppression system designed to isolate thermal events at the module level. Mike Simpson, introduced as an AES engineer, compared battery aging to a phone battery and described monitoring and recycling plans. AES also said batteries would be fenced and placed on concrete pads with rock fire breaks, and that the company intends to coordinate training and equipment with local first responders.

Local ranching concerns and trust-lands issues were central to the discussion. John Reese, a rancher with the grazing permit on proposed lease land, said he opposed the solar farm because it reduces grazing capacity and asked for written, signed agreements protecting ranch operations. Commissioners and staff discussed negotiations with the state trust lands entity (referred to in the transcript as "Sitla"), and asked that AES provide evidence of a PPA or an affidavit of interconnection rights before proceeding. Staff said they are seeking amended development agreements and bonding to guarantee reclamation and asked for assurances on reimbursement for ranch infrastructure and AUMs (animal-unit months) when leases change.

On financing, AES said projects rely on existing federal tax incentives (ITC/PTC) and on new contractual arrangements that can include payment for storage services. The company said it will not resume construction until transmission and PPA terms are secured in writing.

Following technical explanations and an extended question-and-answer period, commissioners agreed they were not prepared to adopt recommendations and moved to place the item on a future commission agenda for further review. The commission did not vote to approve or deny the project at the Nov. 12 meeting.

What happens next: staff said they will circulate consolidated recommendations and evidence (for example, affidavits or documents showing a new PPA/interconnection) to commissioners prior to the follow-up agenda. The developer offered to provide contacts for additional expert briefings.