ERCOT and Texas regulators develop planning and interconnection rules as data center power demand surges
Texas grid planners move to manage a wave of high-demand industrial connections
Texas grid operator ERCOT is advancing a more formal planning and interconnection process to address an accelerating pipeline of proposed large electricity users—led by data centers seeking to locate in the state. The initiative comes as the volume of requests to connect major new loads has grown far beyond what ERCOT’s traditional review process was designed to handle.
By late 2025, ERCOT officials publicly described a large-load queue exceeding 233 gigawatts, with more than 70% of those requests tied to data centers. The scale of the proposals has raised concerns for system planners tasked with ensuring adequate transmission, generation, and operational tools to maintain reliability during periods of high demand and extreme weather.
What is changing: new standards for large loads and new emergency tools
Several rule changes approved in 2025 created a framework for more consistent information, modeling, and technical requirements for large loads. Among the changes are updated interconnection requirements and modeling standards for loads of 25 megawatts or greater, along with related planning guide updates that take effect later in 2025. These changes are intended to improve how large, fast-growing loads are studied and incorporated into ERCOT’s planning process before they connect to the grid.
In parallel, Texas lawmakers enacted Senate Bill 6, which broadens regulatory oversight of large electrical loads in the ERCOT region. The law centers on facilities requesting service at a single site that meets a threshold set at 75 megawatts unless lowered by regulators. It also requires new large loads interconnected after December 31, 2025, to be capable of coordinated curtailment during firm load-shed events and contemplates a new reliability service to procure demand reductions from large-load customers, with requirements including advance notice provisions.
Why forecasting and “stranded infrastructure” are now central issues
Grid planning hinges on credible forecasts. When multiple large projects request interconnection simultaneously—especially projects that may be competing across regions or states—transmission investment decisions can become difficult to time and size. One objective of the new policy direction is to reduce the risk that utilities and customers build transmission or related infrastructure for projects that later scale back, relocate, or withdraw.
At the same time, the state’s reliability concerns are heightened by the size of individual proposals, with some sites seeking hundreds of megawatts or even gigawatt-scale service, which can shift local and regional power flows and accelerate the need for new transmission upgrades.
Key elements under development or implementation
More standardized interconnection and modeling requirements for large loads to improve study quality and comparability.
Regulatory implementation of SB 6 provisions affecting large-load interconnection, operational disclosures, and emergency demand reductions.
Operational readiness requirements for certain new large loads to curtail demand during firm load shed after December 31, 2025.
The policy direction reflects a shift toward treating very large, fast-developing loads as a distinct planning challenge—one that can materially affect transmission needs, resource adequacy, and emergency operations.
Organizational changes aimed at interconnection speed and analysis capacity
ERCOT has also announced internal organizational changes scheduled to launch in January 2026, including a new Interconnection and Grid Analysis organization and an Enterprise Data and Artificial Intelligence unit. The restructuring is intended to strengthen analytical capacity and modernize interconnection processes amid rapid demand growth.
For communities competing to attract data centers and other energy-intensive industries, the emerging framework signals that project timelines and requirements will be increasingly shaped by standardized studies, clearer planning assumptions, and new reliability-focused obligations for large loads.