Anticline Energy Storage Seeks Exempt Wholesale Generator Status

Strategic Insights -

Anticline Energy Storage, LLC has submitted a notice of self-certification to the Federal Energy Regulatory Commission (FERC) for exempt wholesale generator (EWG) status. The company, a subsidiary of NextEra Energy Resources, LLC, plans to develop a 100 MW battery energy storage system in Natrona County, Wyoming, which will interconnect with the PacifiCorp transmission system. Anticline Storage will sell electric energy, capacity, and ancillary services at wholesale, and may engage in incidental activities such as trading emission allowances and selling "green" power certificates.

Key Takeaways:

  • Anticline Energy Storage, LLC, a subsidiary of NextEra Energy Resources, LLC, seeks exempt wholesale generator (EWG) status from the Federal Energy Regulatory Commission (FERC).
  • The company plans to develop a 100 MW battery energy storage system in Natrona County, Wyoming, which will interconnect with the PacifiCorp transmission system.
  • Anticline Storage will sell electric energy, capacity, and ancillary services at wholesale, and may engage in incidental activities such as trading emission allowances and selling "green" power certificates.
  • The company is a wholly owned, direct subsidiary of ESI Energy, LLC, which is a wholly owned, direct subsidiary of NextEra Energy Resources, LLC.
  • NextEra Energy, Inc., a publicly traded company, has a stake in the overall NextEra Energy group, with Vanguard Group Inc. holding 10.78% of publicly traded shares as of the end of the second quarter of 2025.
  • Anticline Storage will not make sales of power at retail and will not own or operate transmission or distribution facilities other than those necessary for wholesale sales.
  • The company represents that it will be engaged directly and exclusively in the business of owning and operating the Facility and selling electric energy at wholesale.
  • No rate or charge for electric energy produced by the Facility was in effect under the laws of any State on October 24, 1992, so no determination or certification by a state commission is necessary prior to certification of the Facility as an EWG.

Statistics:

  • 100 MW capacity of the battery energy storage system planned by Anticline Storage
  • 10.78% stake in NextEra Energy, Inc. held by Vanguard Group Inc. as of the end of the second quarter of 2025
  • $0 rate or charge for electric energy produced by the Facility, as required under the Public Utility Holding Company Act of 1935

Sources:

  • Notice of Self-Certification of Exempt Wholesale Generator Status of Anticline Energy Storage, LLC, submitted to the Federal Energy Regulatory Commission on September 15, 2025.
  • Public Utility Holding Company Act of 1935, as incorporated by reference in 18 C.F.R. § 366.1.
  • 18 C.F.R. § 366.1, defining Exempt Wholesale Generator status.
  • 18 C.F.R. § 366.7, providing regulations for self-certification of EWG status.
  • Energy Policy Act of 2005, enacted pursuant to Pub. L. No. 109-58, 119 Stat. 594 (2005).