New Pathway and Deadlines in ERCOT’s Large Load Batch Zero: Provisional Controllable Load Resource (PCLR)

During the final Large Load Batch Study Workshop on April 9, ERCOT clarified key aspects of the Provisional Controllable Load Resource (PCLR), presenting refined language and foundational concepts and signaling that this pathway is becoming a more defined and viable option for large load developers. 

For projects that may face transmission constraints limiting firm load allocation in early study years, the PCLR pathway, introduced as part of PGRR145 and companion NPRR1325, offers an avenue to access higher levels of demand while planned transmission upgrades are completed. With the July 24, 2026, declaration deadline on the horizon, developers evaluating Batch Zero eligibility should understand what the PCLR designation means and the steps required to pursue it. 

What is a PCLR? 

A Provisional Controllable Load Resource is a Controllable Load Resource (CLR) with additional obligations specific to the Batch Zero process. Like any CLR, a PCLR is a load resource that can reduce or increase consumption under ERCOT dispatch control.  

What distinguishes a PCLR is the set of provisional restrictions applied during the interconnection phase: 

• A PCLR must remain registered as a CLR until a defined Exit Date is established in the Batch Zero Interconnection Study  
• A PCLR cannot provide Ancillary Services to the ERCOT system  
• ERCOT may dynamically cap PCLR energy bids in each SCED run to the level needed to manage eligible transmission constraints 

The Exit Date is tied to the completion of planned transmission upgrades expected to support the full load on a firm basis.  Until that date, the resource is “locked in” as a CLR, and its Low Power Consumption (LPC) limit may not exceed the level identified in the study and agreed to by the Interconnecting Large Load Entity.   

How a PCLR Is Treated in Batch Zero 

ERCOT assesses each PCLR using the same steady-state methodology applied to all other loads in the study. During the Batch Zero Interconnection Study, ERCOT will assess the level of demand that can be reliably served for all PCLRs. 

If the level of demand that can be reliably served in a given year is greater than or equal to the minimum Low Power Consumption (LPC) amount defined by the ILLE, ERCOT will: 

• Set the minimum LPC amount to equal the level of Demand that can be reliably served for each year of the study; and 
• Consider the full requested load amount to be approved for that year, contingent on successful registration as a PCLR. 

If the level of demand that can be reliably served in a given year is less than the minimum LPC amount defined by the ILLE, ERCOT will allocate zero MW in that year. 

Importantly, ERCOT studies the full requested MW in both the stability screening study and the Batch Zero Refinement Study, ensuring the resulting transmission plan addresses the upgrades needed to eventually firm up the full load. 

How to Qualify for PCLR Status in Batch Zero 

The process follows a structured path, illustrated in the diagram below from ERCOT's April 9 Batch Study Workshop. 

At a high level, there are three critical milestones: 

Credit: ERCOT Large Load Batch Study Workshop 7 Presentation

By July 24, 2026, the ILLE must submit a completed and notarized Declaration of Intent (Form W, Part A) along with supporting modeling data, including the minimum LPC limit for each study year. This is submitted through the Interconnecting DSP or TSP to ERCOT and is a binding commitment. 

By March 1, 2027, following the release of Batch Zero study results, the ILLE must sign and notarize Form W Part B accepting the approved LPC amounts and Exit Date, and execute an interconnection agreement. Missing this deadline results in withdrawal from the Batch Zero process. 

Before Approval to Energize above the initial firm LPC limit, the ILLE must: 

• Complete CLR registration with ERCOT 
• Designate a QSE 
• Submit required data in RIOO 
• Establish metering and telemetry 
• Complete all required qualification testing 

Key Things to Know Before Electing PCLR Status 

PCLRs must follow SCED dispatch instructions in real time, meaning consumption above the firm LPC level may be reduced by ERCOT based on system conditions. The PCLR obligation transfers to any future owner of the facility, and non-compliance with ERCOT dispatch instructions may result in revocation of PCLR status. This would limit the load to LCP amounts until new studies are completed. 

Important Note: Language Still Under Review 

The PCLR design and related PGRR145 and NPRR1325 language remain under internal ERCOT review and are subject to change prior to final filing. The current governance timeline targets PRS and ROS votes in May 2026 and Board approval on June 1, 2026, with a target effective date of July 10, 2026.  

Looking Ahead

EPE is actively monitoring all developments and will provide further updates as the framework is finalized in future Watt's Current articles. To discuss how these updates may impact your interconnection strategy, contact our ERCOT team today using the form below.