# West and South Texas: what a 50 MW connection costs under AEP Texas

URL: https://open-factory.com/power/west-and-south-texas/
Data as of: 2026-08-21
Publisher: Open Factory, https://open-factory.com

**What does a 50 MW connection cost in West and South Texas?** In West and South Texas, AEP Texas connects a 50 MW load under same ERCOT/PUCT regime as Oncor, docket PUCT Project 58481. Minimum bill: none by rule (AEP cites take-or-pay ESAs for its vertically integrated utilities; AEP Texas is wires-only). Term: none by rule. Realistic energization: 2029. Open Factory's Large-Load Cost Table, as of August 21, 2026.

## Facts

- Market: West and South Texas, TX (ERCOT)
- Utility: AEP Texas
- Tariff or rule: same ERCOT/PUCT regime as Oncor
- Docket: PUCT Project 58481; Batch Zero
- Status: as Oncor
- Large-load threshold: 75 MW (SB 6)
- Study fee: TDSP study (fee not published)
- Security or collateral: AEP contracts are take-or-pay electric service agreements at the AEP level; AEP Texas terms not public
- Minimum bill: none by rule (AEP cites take-or-pay ESAs for its vertically integrated utilities; AEP Texas is wires-only)
- Contract term: none by rule
- Ramp: none by rule
- Exit fee: as Oncor for 75 MW+
- CIAC exposure: as Oncor; AEP Texas funding ~100 transmission projects with a $3.26B DOE loan
- Realistic energization, 50 MW: 2029
- Verification: PARTIAL (regime verified; AEP Texas queue and fees not public)
- Data as of: August 21, 2026

## Questions

### What does a 50 MW connection cost in West and South Texas?

AEP Texas: study fee TDSP study (fee not published); collateral AEP contracts are take-or-pay electric service agreements at the AEP level; AEP Texas terms not public; minimum bill none by rule (AEP cites take-or-pay ESAs for its vertically integrated utilities; AEP Texas is wires-only); term none by rule.

### When can a 50 MW load be energized in West and South Texas?

2029. AEP added 6 GW of signed load agreements in Q2 2026 mostly in Texas; 765 kV Permian lines targeted for December 2028; Batch Zero plan fall 2027.

### Which tariff applies to large loads in West and South Texas?

same ERCOT/PUCT regime as Oncor; docket PUCT Project 58481; Batch Zero; status: as Oncor.

### Is this rate proposed or approved?

Approved or in effect as of the data date (as Oncor). PARTIAL (regime verified; AEP Texas queue and fees not public).

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## Sources

- [Open Factory Large-Load Cost Table](https://open-factory.com/models/large-load-cost-table/)
- [aep.com (2026-07-30)](https://www.aep.com/news/stories/view/12135/)
- [utilitydive.com (2026-01-06)](https://www.utilitydive.com/news/ercots-large-load-queue-jumped-almost-300-last-year-official/808820/)

Model: https://open-factory.com/models/large-load-cost-table/
Calculator: https://open-factory.com/tools/interconnection-cost/