Texas PUC Softens Data Center Grid Interconnection Rules
The Texas Public Utility Commission has adopted final interconnection rules for large loads, eliminating a proposed $50,000-per-MW fee and extending
The Public Utility Commission of Texas voted on September 21, 2026, to adopt new interconnection standards for large electric loads, significantly softening financial and timeline requirements from its March proposal. The commission eliminated a non-refundable interconnection fee and extended deadlines for projects to meet energization milestones.
The final rules apply to loads with a peak demand over 75 megawatts, a category heavily populated by data centers. The commission removed a proposed rule that would have required a non-refundable interconnection fee of $50,000 per MW of contracted peak demand. It also reduced the required financial security deposit from $100,000 per MW to $50,000 per MW of requested peak demand.
Key Changes to Financial Requirements
The adopted rules establish a flat $100,000 study fee for all large load customers, replacing a tiered structure based on project size that was in the initial proposal. The commission stated that as more data on study costs becomes available, it may amend the rule to update this fee amount. In a March blog post cited by the source, law firm DLA Piper warned the original proposals "could result in significant upfront capital commitments" and noted the financial thresholds were "higher than those imposed by other major US grid operators."
| Requirement | Proposed Rule (March) | Adopted Rule (September 2026) |
|---|---|---|
| Non-refundable Interconnection Fee | $50,000 per MW | Eliminated |
| Financial Security Deposit | $100,000 per MW | $50,000 per MW |
| Study Fee | Tiered by project size | Flat $100,000 |
Extended Timelines for Project Milestones
The commission also relaxed rules governing when grid operators must notify the Electric Reliability Council of Texas, or ERCOT, if a customer misses scheduled energization milestones. The proposed rules required notification if a milestone was missed by six months. The final rules extend that period to 24 months. Also, the commission clarified that the 24-month period applies to the overall energization schedule, not to each individual milestone.
Once ERCOT is notified, the interconnecting distribution or transmission service provider has 60 days to apply the customer's financial security to any outstanding amounts and return the balance. This replaces a more complex proposed mechanism where only 20% would be refunded initially, with the remainder used to offset the transmission provider's rate base.
Context of Texas Grid and Data Center Demand
These less stringent rules arrive during a state-ordered pause on new data center grid interconnections. Texas Governor Greg Abbott ordered the pause in August 2026 as the state audits ERCOT's massive interconnection queue, which holds 474 gigawatts of requested capacity. Approximately 90% of that queue is composed of data center projects.
The rulemaking reflects an ongoing effort to manage rapid load growth while ensuring grid reliability. The final order represents a compromise from stricter initial proposals, potentially reducing upfront costs for developers seeking to connect large data centers to the Texas power system.
