10/29/2025 Announcement:

As part of South Texas Electric Cooperative’s (STEC)  Shortlisting process, we are continuing our evaluation of proposals across all categories and require additional time to complete our review. Accordingly, STEC is extending STEC’s deadline to issue shortlist notifications to all Participants through close of business on Friday, October 31, 2025 (Central time). This extension relates solely to STEC’s notification to Participants; it does not require any action or additional information from Participants by that date.

This schedule adjustment applies to all proposal categories and does not alter any other terms, conditions, requirements or Participant submission deadlines under the RFP.  For the avoidance of doubt, no Participant submissions are due on October 31, 2025, and the Final Offers deadline of December 3, 2025 (5:00 p.m. Central time) remains unchanged at this time. STEC reserves all rights under the RFP, including the right to further modify the schedule in STEC’s sole discretion. To the extent reasonably possible, we will keep Participants apprised of any additional changes.

Please continue to direct all communications regarding this RFP to the designated address: [email protected]. STEC will continue to take reasonable precautions to protect any confidential information in accordance with the RFP and any applicable NDA.

We appreciate your continued engagement and patience as we complete our evaluation.

Sincerely,
South Texas Electric Cooperative
[email protected]

September 4th Update

The STEC Consolidated Q&A Sheet is now available in the RFP Documents page.

July 18th Update

Subject to the applicable requirements and eligibility criteria set forth in the RFP, STEC may also consider Proposals that include a Battery Energy Storage System (“BESS”) for a portion of the 500 MW of requested capacity. Any proposed BESS must be capable of providing peaking and firming service to support the delivery of dispatchable energy—either alone or in combination with other generation resources —in accordance with its rated capacity, duration, and the operational and reliability standards outlined in the RFP documentation.  Please note, however, that proposals to deliver a solar + BESS configuration will not be considered.

Participants submitting Proposals with a BESS component must clearly specify the size (MW and MWh), technology, and operational characteristics of the BESS, as well as indicate whether the Proposal contemplates an acquisition, PPA, or tolling transaction structure. All BESS-related costs, interconnection requirements, and performance guarantees must be included in the Proposal. STEC reserves the right to evaluate the benefits and risks of any BESS component as part of its overall assessment of Proposals.

**

South Texas Electric Cooperative (STEC) has issued a request for proposal (RFP) to solicit bids for up to 500 megawatts (MW) of firm, dispatchable capacity (Firm RFP); and

Prospective bidders may download the RFP through the RFP Documents page on this site.  All inquiries should be made by e-mail to the address for inquiries below.

Deadline to submit “Notice of Intent to Respond”	August 6, 2025
Initial Bids Due	September 10, 2025
Inquiries	[email protected]

Please see the RFP for factors affecting participation and other terms and conditions and information regarding the RFP