AEP Texas Inc. Submits Amended Service Agreement to FERC

Strategic Insights -

AEP Texas Inc. has submitted a document to the Federal Energy Regulatory Commission (FERC) for the filing of a service agreement between AEP Texas Inc. and Corpus Battery Storage, LLC, also known as Lynx Energy Storage Substation, to be located in Nueces County, Texas. The agreement, dated June 23, 2025, is an amended version of the original interconnection agreement filed on April 9, 2024. This new agreement incorporates several substantive updates, including revised plant capacity and number of generating units, substation name, and notice information.

Key Takeaways:

  • The amended agreement, Service Agreement No. 903, provides for the electrical interconnection of Corpus Battery Storage, LLC's approximately 131 MW plant with AEP Texas Inc.'s transmission system.
  • The Lynx Energy Storage Substation will be located in Nueces County, approximately six miles southwest of Robstown, Texas.
  • The agreement includes financial security in the amount of $5 million, provided by Corpus Battery Storage, LLC, as required pursuant to Section 8.3 of the original agreement.
  • AEP requests that the Commission grant any and all waivers of the Commission's rules and regulations necessary for acceptance of this filing and the enclosed amended agreement.
  • The requested effective date of the amended agreement is June 23, 2025, the date on which the amended agreement was executed.

Statistics:

  • The plant capacity is approximately 131 MW.
  • The financial security provided by Corpus Battery Storage, LLC is in the amount of $5 million.
  • The location of the Lynx Energy Storage Substation is in Nueces County, Texas, approximately six miles southwest of Robstown.
  • The requested effective date of the amended agreement is June 23, 2025.

Sources:

  • 18 C.F.R. Part 35 (2025)
  • 18 C.F.R. § 35.7 (2025)
  • 18 C.F.R. § 35.3(a)(2)
  • 64 FERC P 61,139 at 61,983-84 (1993)
  • Commission Docket No. ER25-____-000
  • Public Utility Commission of Texas (PUCT) Docket No. ER24-1899-000 (unpublished letter order)

(AEP Texas Inc., June 20, 2024)