# Dallas-Fort Worth: what a 50 MW connection costs under Oncor Electric Delivery

URL: https://open-factory.com/power/dallas-fort-worth/
Data as of: 2026-08-21
Publisher: Open Factory, https://open-factory.com

**What does a 50 MW connection cost in Dallas-Fort Worth?** In Dallas-Fort Worth, Oncor Electric Delivery connects a 50 MW load under SB 6 (75 MW+) and PUCT proposed 16 TAC 25.194; ERCOT Batch Zero (NPRR1325/PGRR145); standard TDSP facilities extension below 75 MW, docket PUCT Project 58481 (proposed rule published 2026-03-12; comments due 2026-04-17). Minimum bill: none (retail energy is bought from a REP; TDSP delivery charges follow 4CP demand). Term: none. Realistic energization: 2029. Open Factory's Large-Load Cost Table, as of August 21, 2026.

## Facts

- Market: Dallas-Fort Worth, TX (ERCOT)
- Utility: Oncor Electric Delivery
- Tariff or rule: SB 6 (75 MW+) and PUCT proposed 16 TAC 25.194; ERCOT Batch Zero (NPRR1325/PGRR145); standard TDSP facilities extension below 75 MW
- Docket: PUCT Project 58481 (proposed rule published 2026-03-12; comments due 2026-04-17); Batch Zero approved by ERCOT board 2026-06-01 and PUCT 2026-06-18
- Status: 25.194 still a proposal in sources opened; Batch Zero paused by the Governor's 2026-08-03 directive; ERCOT audit filing targeted 2026-12-10
- Large-load threshold: 75 MW (SB 6 and Batch Zero); 25 MW for ERCOT's community-impact review
- Study fee: $100,000 for 75 to 250 MW and $300,000 above 250 MW plus actual study costs (proposed); below 75 MW: TDSP study (fee not published)
- Security or collateral: $50,000 per MW at the intermediate agreement (20% refundable on withdrawal) plus a non-refundable $50,000 per MW interconnection fee at the interconnection agreement (proposed); none of this applies below 75 MW
- Minimum bill: none (retail energy is bought from a REP; TDSP delivery charges follow 4CP demand)
- Contract term: none
- Ramp: none required by rule
- Exit fee: 80% of posted security forfeited on withdrawal (75 MW+ proposal)
- CIAC exposure: 100% of direct interconnection costs including radial lines and substations with no revenue credit (75 MW+ proposal); standard tariff CIAC below 75 MW
- Realistic energization, 50 MW: 2029
- Verification: PARTIAL (regime verified from ERCOT/PUCT/Governor documents; Oncor's own tariff sheet not opened)
- Data as of: August 21, 2026

## Questions

### What does a 50 MW connection cost in Dallas-Fort Worth?

Oncor Electric Delivery: study fee $100,000 for 75 to 250 MW and $300,000 above 250 MW plus actual study costs (proposed); below 75 MW: TDSP study (fee not published); collateral $50,000 per MW at the intermediate agreement (20% refundable on withdrawal) plus a non-refundable $50,000 per MW interconnection fee at the interconnection agreement (proposed); none of this applies below 75 MW; minimum bill none (retail energy is bought from a REP; TDSP delivery charges follow 4CP demand); term none.

### When can a 50 MW load be energized in Dallas-Fort Worth?

2029. JLL 2026 outlook: ~2.5 years average for a new 50 MW data center in Dallas before the pause; Batch Zero final transmission plan not expected before fall 2027; Oncor has 298 GW of requests and about 44 GW that met Batch Zero criteria.

### Which tariff applies to large loads in Dallas-Fort Worth?

SB 6 (75 MW+) and PUCT proposed 16 TAC 25.194; ERCOT Batch Zero (NPRR1325/PGRR145); standard TDSP facilities extension below 75 MW; docket PUCT Project 58481 (proposed rule published 2026-03-12; comments due 2026-04-17); Batch Zero approved by ERCOT board 2026-06-01 and PUCT 2026-06-18; status: 25.194 still a proposal in sources opened; Batch Zero paused by the Governor's 2026-08-03 directive; ERCOT audit filing targeted 2026-12-10.

### Is this rate proposed or approved?

Not yet final: 25.194 still a proposal in sources opened; Batch Zero paused by the Governor's 2026-08-03 directive; ERCOT audit filing targeted 2026-12-10. The table carries the filed terms and the docket to watch.

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- [The 2% Funnel: 474 GW Requested, 9 GW Approved, 5.8 GW Energized in ERCOT](https://open-factory.com/articles/ercot-funnel/)
- [Introducing the Large-Load Cost Table: 15 Markets Side by Side](https://open-factory.com/articles/large-load-cost-table-launch/)
- [What 50 MW Costs in 15 US Markets](https://open-factory.com/articles/what-50mw-costs-15-markets/)
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- [When a Megapack Beats a Static UPS](https://open-factory.com/articles/bess-as-ups/)

## Sources

- [Open Factory Large-Load Cost Table](https://open-factory.com/models/large-load-cost-table/)
- [ercot.com (2026-06-18)](https://www.ercot.com/news/release/06182026-puct-approves-ercots)
- [ercot.com (2026-04-01)](https://www.ercot.com/files/docs/2026/04/01/ERCOT_LargeLoad_Update_April2026_B-C_-Hearing.pdf)
- [gtlaw.com (2026-03)](https://www.gtlaw.com/en/insights/2026/3/texas-senate-bill-6-update-what-data-centers-large-load-customers-should-know-about-proposed-interconnection-standards)
- [gov.texas.gov (2026-08-03)](https://gov.texas.gov/uploads/files/press/Thomas_Gleeson_Pablo_Vegas_Data_Centers_Directive_Letter_to_PUCT_ERCOT_August_2026_.pdf)
- [utilitydive.com (2026-08-07)](https://www.utilitydive.com/news/fate-of-oncors-nearly-300-gw-load-pipeline-unclear-following-texas-data-ce/827303/)

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