Texas regulators soften data center interconnection rules amid grid audit

Texas Data Center Interconnection Rules set a flat study fee and longer energization timelines, reshaping large-load reviews as ERCOT audits a queue dominated by data centers amid grid reliability oversight.

The Public Utility Commission of Texas has adopted revised standards for large-load interconnections, removing a proposed non-refundable charge that would have been assessed on each megawatt of contracted peak demand. The final Texas Data Center Interconnection Rules instead establish a flat $100,000 study fee for every large-load customer, regardless of project size.

The adopted approach marks a significant change from the proposal issued in March. That draft would have required a non-refundable interconnection fee of $50,000 per MW of contracted peak demand and would have used project-size tiers for study fees. The commission retained a study-fee requirement but selected one uniform amount, while leaving open the possibility of revisiting that amount as more information on study costs becomes available. The policy shift will be closely watched alongside Texas Lawmakers Push Grid Connection discussions affecting major new loads.

The changes come as Texas examines the volume and composition of interconnection requests in the ERCOT queue. The queue totals an estimated 474 GW, with data centers accounting for about 90% of the requests cited in the review. The state has paused new data center development while the audit proceeds, putting further attention on how interconnection standards handle prospective large-load demand. The context also heightens interest in the September 2026 Electricity Outlook Texas Data Centers as grid planners evaluate load growth.

The final rule also changes the treatment of missed energization milestones. Under the initial proposal, an interconnecting distribution service provider or transmission service provider would have been required to notify ERCOT of non-utilized customer capacity no later than 30 days after a milestone had been missed for six months. The adopted standard provides 24 months instead.

Commission revisions further clarify that the 24-month period applies to the energization schedule as a whole rather than to every individual energization milestone. This distinction gives large-load projects more time before unused capacity must be reported, while preserving a formal process for addressing capacity that is not being placed in service according to the schedule. The issue intersects with planning concerns reflected in Texas Authorizes Emergency Grid Backup Power measures for system conditions.

Once notice is provided to ERCOT, the interconnecting provider must, within 60 days, apply the customer's financial security to outstanding amounts owed and return the remaining balance to the large-load customer. The proposed version would have returned only 20% to the customer, applying the rest to unpaid amounts and then using any remainder as an offset to the transmission provider's rate base in a later proceeding.

By reducing upfront interconnection costs and extending the milestone timeline, the final rules soften two central financial and scheduling provisions for data centers and other large-load customers. Their implementation will be assessed against ongoing concerns around ERCOT Texas Crypto Mining demand and the wider reliability implications outlined in NERC Level 3 Alert On Data Centers Grid Reliability coverage.

Related News

• Electricity Forum News

• Grid Technologies News