ERCOT Queue Hits 410 GW — Nearly 5× Texas Peak Demand as Legislature Confronts Data Center Surge

410 GW: Potential vs. Reality

ERCOT officials have been careful to emphasize that 410 GW represents "potential demand and expressions of interest" — not confirmed or inevitable load. A significant portion of the queue reflects pent-up requests that entered the system over a very short period in early 2026, as developers rushed to secure positions ahead of new regulatory requirements.

Historical attrition rates for interconnection queues across U.S. ISOs typically run 60-80%, meaning a realistic conversion could produce 80-160 GW of actual load over the coming decade. Even the conservative end of that range — 80 GW — would essentially require building a second ERCOT grid. The aggressive end — 160 GW — is physically implausible without massive new generation, transmission, and water infrastructure that doesn't yet exist in Texas's planning pipeline.

Senate Bill 6: The Filter

Texas's primary regulatory response is Senate Bill 6 (SB 6), passed during the 2025 legislative session. SB 6 establishes a framework for regulating large-load customers with peak demand of 75 MW or more — a threshold that captures virtually all data center campuses but excludes most traditional commercial loads:

• Financial Security Deposits: The PUC has proposed $50,000 per MW in financial security, payable upon filing an interconnection request. For a 500 MW data center campus, this amounts to a $25 million deposit — effectively filtering out speculative filings from developers without committed financing.
• Binding Agreements: Projects must execute binding interconnection service agreements with demonstrated timelines for load energization, replacing the previous system where developers could hold queue positions indefinitely without penalty.
• Planning Standards: Large loads must demonstrate how they will contribute to grid reliability, including potential requirements to maintain backup generation, participate in demand response during emergencies, or contribute to transmission upgrade costs.

Texas Legislature Takes Notice

The Texas House Committee on State Affairs held interim hearings in April 2026, examining three critical dimensions of the data center surge:

• Grid Reliability: Whether ERCOT's current reserve margins can accommodate the scale of new load without compromising reliability for existing residential and commercial customers.
• Long-Term Infrastructure Planning: The need for new generation capacity, including the state's $350 million fund for nuclear energy development and proposals for 765-kV transmission lines to serve the Permian Basin and other industrial corridors.
• Water Resources: Data center cooling systems consume significant water, particularly in operations that don't use closed-loop or adiabatic cooling. In drought-prone West Texas, water availability may become the binding constraint before electricity.

These hearings signal that data center regulation will be a major focus of the 2027 legislative session, with potential additional restrictions on siting, water use, and grid impact mitigation.

ERCOT's Batch Study Process

To manage the queue flood, ERCOT is transitioning from case-by-case interconnection studies to a batch study process. Projects are grouped and studied collectively, allowing ERCOT engineers to model cumulative grid impacts rather than evaluating each request in isolation.

The first cohort — "Batch Zero" — prioritized projects that could demonstrate grid-readiness and financial commitment within 18-24 months. Projects not included in Batch Zero face multi-year waits as subsequent batches are studied and processed, prompting some developers to evaluate alternative locations in SPP West, MISO South, or PJM.

Commercial Buyer Action Items

• Monitor TUOS Charges: Transmission Use of System charges are ERCOT's primary mechanism for socializing infrastructure costs. Watch for revisions in your TDU's delivery tariff that reflect data-center-driven transmission upgrades.
• Optimize 4CP Strategy: As data center load reshapes ERCOT's peak demand profile, the timing and magnitude of the four coincident peak intervals may shift. Revisit your load curtailment strategy to ensure it still captures maximum 4CP savings.
• Evaluate Demand Response Revenue: ERCOT's growing need for flexible load creates significant revenue potential for curtailable commercial operations. Contact your REP or QSE about demand response program enrollment, particularly if you're in the North or West zones where data center congestion is highest.
• Track Legislative Calendar: The 2027 Texas legislative session will likely introduce new regulations that could restructure how commercial ratepayers share grid costs with data centers. Monitor committee hearings and PUC rulemaking proceedings for early signals.