Two parallel Texas tracks. (1) Batch Zero (PGRR145 + NPRR1325) is ERCOT's proposed replacement for the existing one-at-a-time Large Load Interconnection Study (LLIS) process — instead of studying each new large-load request individually, Batch Zero would batch all pending requests in defined windows and study them collectively, producing tighter cost-allocation and a faster pathway for hyperscale interconnections. The standard governance ladder is PRS → ROS → TAC → ERCOT Board. PRS cleared May 6, ROS cleared May 7, and the original target was TAC May 13-15 with a Board vote at the June 2-3 board meeting. The Cliff repo commit message indicates TAC tabled the package on May 13. Tabling at TAC means stakeholders raised material concerns that the committee wasn't ready to resolve — the package will likely come back at the next TAC meeting cycle (mid-June), which compresses the timeline to the Board meeting. Verify the specific reason for tabling tomorrow via the ERCOT TAC meeting minutes or the M-A301326-XX market notices. (2) The 410 GW interconnection-request figure is the most extreme version of the 'interconnection queue dwarfs current demand' problem in any US ISO. PJM has roughly 250-300 GW of generation interconnection requests (different denominator) and MISO is roughly 200 GW — but ERCOT's 410 GW figure is large-LOAD requests, not generation, and the ratio to current peak demand (4.5-5x) is unprecedented. The implication is that even if ERCOT approves Batch Zero on the original timeline, the queue is so large that most of the 410 GW will not interconnect for 5+ years. SB 6 implementation across the five PUCT tracks is designed to triage the queue procedurally rather than physically expand the grid faster — the rules are about who pays for what and who waits longer, not about adding generation. For any Texas siting decision, the question 'when can this site actually energize' is now determined by Batch Zero timing first, SB 6 cost-allocation rules second, and physical generation/transmission additions third. Sources: Cliff repo commit b1d90b7 ('wiki-lint: TAC tabled PGRR145/NPRR1325 5/13'); ERCOT PGRR145 issue page; ERCOT NPRR1325 issue page; ERCOT Market Notice M-A301326-01 ('Stakeholder Comments on proposed Large Load...'); ZeroEmissionGrid 'ERCOT Batch Zero Workshop #7: PGRR145, BYOG, CLR Updates'; ZeroEmissionGrid 'ERCOT Large Load Batch Study Workshop #4: Key Takeaways'; EPE Consulting 'New Framework for Large Loads in ERCOT: Batch Zero PGRR145'; SK Energy 'ERCOT's Batch Study Process: What Large Load Developers Need to Know'; Perkins Coie 'SB 6 Implementation Shaping Data Center Future in Texas'; Mayer Brown 'Important Texas Regulatory Updates for Data Centers'; Greenberg Traurig 'Texas Senate Bill 6 Update'; Baker Botts 'Texas Senate Bill 6: Understanding the Impacts to Large Loads and Co-located Generation.'
Primary source · Cliff repo / ERCOT PGRR145 + NPRR1325 / ZeroEmissionGrid / EPE Consulting / SK Energy / Perkins Coie / Mayer Brown / Greenberg Traurig / Baker Botts ↗
Why it matters
Three updates. (1) The TAC tabling is the first procedural setback inside ERCOT's Batch Zero governance ladder. Until May 13, the Batch Zero package was on a glide path: PRS clear, ROS clear, TAC vote May 13-15, Board June 2-3. A TAC table compresses the remaining schedule and creates real risk that the June Board meeting will see either a still-contested package or no package at all. For Cliff's ERCOT-zone site-readiness underwriting, any Texas site evaluation that assumed Batch Zero in force by mid-2026 needs to slip its assumed-energization date by 1-3 months. This is the kind of inside-baseball protocol delay that doesn't show up in mainstream coverage but materially shifts the underwriting math — exactly the wedge for Cliff's regulatory knowledge graph. Pull the TAC meeting minutes tomorrow and add the specific stakeholder objection that caused the tabling to the knowledge graph (likely candidates: cost-allocation methodology for stranded-cost recovery, BYOG / co-located generation netting rules, or the interaction with SB 6's PUCT-level rule tracks). (2) The 410 GW interconnection queue is the single most important macro number for any US data-center site decision in 2026. Almost no analyst piece has correctly contextualized this: 410 GW of pending large-load requests against ~85-90 GW current peak demand means that the vast majority of those requests will physically not interconnect on the developer's planned timeline. The market structure ERCOT is converging on (Batch Zero + SB 6's five PUCT rule tracks) is fundamentally a triage mechanism — who gets to interconnect first, who pays for the upgrades, who is forced to provide co-located generation or BTM, and who gets curtailed. Cliff's de-rate calculator SKU should price ERCOT siting differently from PJM and MISO precisely because the queue ratio is so extreme: the 'expected interconnection timeline given queue position' is the dominant variable. (3) The ERCOT tabling cross-references the broader PJM compliance filing due to FERC today (different ISO, similar procedural dynamic). Both are large-load-interconnection rule fights happening at ISO/RTO level, both are moving on overlapping timelines, and both will produce final rule text that materially affects underwriting math for any new hyperscale site in their territory. Add a cross-ISO comparison row to strategy/competitive-landscape-and-adjacencies.md: 'ERCOT Batch Zero (PGRR145/NPRR1325, TAC tabled 5/13)' vs 'PJM colocation compliance (FERC April 16 order, filing due 5/18)' vs 'MISO 2026 IRP-driven large-load tariff (status TBD)' — the three are converging on different solutions to the same problem.
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