Mar 3, 2026|News

ERCOT Implements RIOO Enhancements to Support NOGRR245 Compliance

By Carlos Matar

ERCOT continues to advance implementation of NOGRR245 ride-through requirements by enhancing the Resource Integration and Ongoing Operations (RIOO) system. Recent updates and clarifications from ERCOT reinforce a key theme for resource owners and developers: ride-through compliance is required at multiple points across the resource lifecycle and must be actively maintained over time.

While ride-through requirements are not new, the submission structure, timing, and lifecycle tracking expectations are now more formalized and enforceable.

If ride-through performance changes between milestones, the Resource has the opportunity and the obligation to update the data. ERCOT made it clear that Checklist Parts 2 and 3 will not be approved unless updated ride-through information has been reviewed and accepted by the Generation Reliability Integration (GRI) team.

New “Ride_through” Change Request in RIOO-RS

For resources registered in RIOO-RS, ERCOT is introducing a new Change Request type: “Ride_through.” This is the only mechanism for updating required ridethrough data after registration.

ERCOT strongly encourages submission of all three attachment types: OEM Documentation, Consultant studies and Capability Curves. OEM documentation helps define inverter capability, while NOGRR245 compliance is evaluated at the Point of Interconnection (POI).

Reliability Assessments and Exemption Reviews in 2026

ERCOT will initiate NOGRR245 Reliability Assessments in Q2 2026 to evaluate exemption requests for resources unable to meet requirements under PUCT Substantive Rule §25.517.

ERCOT will work closely with REs to gather required information, including dynamic models, and aims to collect as much data as possible by April 30, 2026. Missing information after that date may be escalated to Enforcement and Risk Management (ERM).

ERCOT emphasized that if multiple resources within a portfolio receive data requests, REs should coordinate with ERCOT to resolve all projects in a single meeting where possible.

What This Means for Resource Owners

Review ride-through data requirements at each interconnection milestone: Ensure VRT, FRT, and IEEE 2800-2022 information is submitted and updated as projects advance
Prepare to use the “Ride_through” Change Request: This is the only mechanism for updating ride-through data in RIOO-RS post-registration
Gather supporting documentation early: Coordinate with OEMs and consultants to compile OEM documentation, studies, and capability curves
Monitor operational changes: Any control or equipment modifications affecting POI performance must trigger a Ride_through Change Request
Get ahead of 2026 reliability assessments: Respond promptly to ERCOT data requests and plan portfolio-wide coordination if multiple projects are involved

Bottom Line

With ERCOT’s enhanced RIOO controls and upcoming 2026 assessments, incomplete or outdated ride‑through data now represents a material compliance risk. The EPE team is ready to assist. To find out how we can help you facilitate critical early coordination with OEMs, consultants, and internal teams and avoid enforcement exposure and last‑minute remediation, contact our team using the form below.

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About the Author

Carlos Matar

Carlos Matar is the Vice President of MENA Operations at Electric Power Engineers (EPE), where he leads the ERCOT Interconnection Services line of business and heads the Energy Resources team in Lebanon, with a combined team of around 75 engineers across Lebanon and North America.

He joined EPE in 2008 as a fresh graduate and has grown with the company into his current role, playing a key part in building new lines of business and expanding the Lebanon office from a small team into a core part of the organization.

Carlos plays a central role across both operations and commercial efforts, leading the delivery of complex energy projects while building long-term client relationships and expanding the team's capabilities. His team supports developers across the full interconnection lifecycle, from early-stage strategy and planning studies through interconnection applications and detailed modeling across platforms such as PSSE, PSCAD, TSAT, ASPEN, and ETAP, through to commercial operation, ensuring interconnection requirements and critical COD milestones are met on time.

He focuses on the interconnection of utility-scale solar, wind, battery storage, conventional generation, and large load projects, with deep experience in the ERCOT market. He has also served as an owner’s engineer on renewable energy projects, providing technical support to ensure compliance with interconnection requirements and industry best practices.