On February 17, 2025, the Secretary of Energy published Resolution 67/2025 (“Resolution 67”), initiating the national and international open tender “Almacenamiento AlmaGBA” (the “Call for Bids”).

The Call for Bids is designed to incorporate new Battery Energy Storage System (“BESS”) generation power plants within the concession areas of the distribution companies Edenor and Edesur. The goal is to achieve a combined capacity of 500 MW, with an execution period of 12 to 18 months.

Preferred bidders will enter into a power storage and generation agreement (the “Storage-Generation PPA”) with Edenor and Edesur, with CAMMESA acting as a last-resort guarantor.

While the full details of the Storage-Generation Agreement are yet to be released, the main aspects of the Call for Bids are outlined below:

1. Scope of the Call for Bids

The Call for Bids seeks to enhance the reliability and supply conditions, within the Buenos Aires metropolitan area and the Wholesale Electricity Market (“WEM”), focusing on specific connection nodes (“CNs”), which are specified in the Call for Bids.

Bidders selected under the Call for Bids will enter into a Storage-Generation PPA, committing to energy supply and power availability for a minimum of four (4) consecutive hours per full discharge cycle. The term of the Storage-Generation PPA will be 15 years.

2. Minimum and maximum power capacity per project

The power capacity for each bid must range from a minimum of 10 MW to a maximum capacity, determined by the lesser of 150 MW or the capacity assigned to each CNs.

3. Storage-Generation PPA

Under the Storage-Generation PPA, Edenor or Edesur will be the principal obligors, whereas CAMMESA will serve as a last-resort guarantor. Should a payment default occur for two or more periods, CAMMESA may be required to pay the outstanding amonuts in lieu of Edenor or Edesur, as applicable.

CAMMESA’s guarantee will be capped at a maximum of twelve (12) consecutive months, equivalent to the remuneration under the Storage-Generation PPA.

The full terms of the Storage-Generation PPA will be published no later than March 31, 2025.

4. Call for Bids Schedule

  • Consultation period: February 19 – May 4, 2025.
  • Publication of the Storage-Generation PPA: March 31, 2025.
  • Publication of responses to consultations: February 24 – May 11, 2025.
  • Bids Submission deadline: May 19, 2025.
  • Award date: June 27, 2025.
  • Storage-Generation PPA signing date: June 30, 2025.

5. Bidders and offers requirements

Among the various requirements set forth in the Call for Bids, bidders are required to provide a bank guarantee of US$10,000 per MW as a bid bond.

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For additional information, please contact Nicolás Eliaschev, Javier Constanzó, Daiana Perrone, Victoria Barrueco and/or Manuel Crespi.