NOGRR245 is a Nodal Operating Guide Revision Request approved by the Public Utility Commission of Texas (PUCT) that strengthens ERCOT’s ride-through performance requirements for Inverter-Based Resources (IBRs), including frequency ride-through and voltage ride-through capabilities.

2. Who must comply with NOGRR245?

All transmission-connected IBRs, Type 1 Wind Generation Resources (WGRs), and Type 2 WGRs that have submitted an extension request or exemption request under PUCT 25.517(c) must provide complete, resource-specific ride-through capability data to ERCOT by September 15, 2025.

3. What is the compliance deadline?

The final deadline is September 15, 2025. Late or incomplete submissions will be rejected by ERCOT, which may result in denial of your extension or exemption request.

4. What forms are required?

You must submit either: IFRTCR (Initial Frequency Ride-Through Capability Report) for frequency requirements (§2.6.2.1) IVRTCR (Initial Voltage Ride-Through Capability Report) for voltage requirements (§2.9.1.2)

5. Where do I send my completed forms?

Send completed IFRTCR or IVRTCR forms to NOGRR245@ercot.com .

6. How do I submit models to ERCOT?

Post-modification models must be submitted via the RIOO system with the label “NOGRR245 Model Submission.”

7. What data must be included in IFRTCR/IVRTCR?

Resource entity details (name, DUNS, site name, unit names) Current ride-through capability tables per Nodal OG format All known technical limitations OEM or engineering verification letters / notarized attestations Planned modifications and implementation schedule Post-modification capability tables and models

8. What if my OEM cannot provide a verification letter?

You must submit a notarized attestation signed by your highest-ranking representative explaining: Efforts taken to obtain the OEM letter Why those efforts were unsuccessful Technical limitations of the resource

9. What deficiencies has ERCOT identified in past submissions?

Missing required technical data Generic, non-resource-specific ride-through data Data not reflecting Point of Interconnection performance Delays due to pending OEM model updates without interim dataa

10. Why are ride-through capability tables required?

These tables document your resource’s ability to ride through frequency or voltage disturbances, ensuring compliance with ERCOT’s Nodal Operating Guides.

11. What is PUCT Substantive Rule 25.517(c)?

This rule outlines the process for requesting an exemption from ERCOT reliability requirements and specifies the data, models, and documentation that must be provided.

12. Can I request an exemption after September 15, 2025?

No. ERCOT will not accept any exemption requests after the deadline.

13. What happens if I miss the deadline?

ERCOT may: Deny your extension or exemption request Require immediate full compliance Impose operational restrictions

14. What’s the difference between IFRTCR and IVRTCR?

IFRTCR – Frequency ride-through capability report (§2.6.2.1) IVRTCR – Voltage ride-through capability report (§2.9.1.2)

15. How does Keentel Engineering assist with compliance?

We provide turnkey ERCOT compliance services, including: Gap analysis of IFRTCR/IVRTCR submissions OEM/engineering letter coordination Notarized attestation preparation Ride-through table creation per Nodal OG Post-modification model preparation and RIOO submissions Full ERCOT & PUCT compliance packages

16. Can I submit generic OEM data?

No. ERCOT requires resource-specific performance data at the Point of Interconnection.

17. What are the risks of providing incomplete models?

Incomplete or inaccurate models may lead ERCOT to reject your submission, delaying approval and forcing immediate compliance without extensions or exemptions

18. What must my model include?

It must reflect post-modification performance and accurately represent all technical limitations.

19. What if my resource is already compliant?

You must submit a statement confirming that your current ERCOT-submitted model fully represents all technical limitations.

20. How can I get started with Keentel Engineering?

Email: contact@keentelengineering.com Phone: 813-389-7871 Website: www.keentelengineering.com

ERCOT NOGRR245 Compliance | Meet the September 15, 2025 Deadline

A Coordinated Electric System Interconnection Review—the utility’s deep-dive on technical and cost impacts of your project.

Challenge: Frequent false tripping using conventional electromechanical relays
Solution: SEL-487E integration with multi-terminal differential protection and dynamic inrush restraint
Result: 90% reduction in false trips, saving over $250,000 in downtime

ERCOT’s review of over 900 NOGRR245 compliance submittals revealed several recurring deficiencies:

Missing required ride-through technical data
Non-resource-specific, generic ride-through documentation
Data not reflecting Point of Interconnection (POI) performance
Delays due to pending OEM model updates

Without this information, ERCOT cannot properly assess extension or exemption requests, which could delay interconnection approval and put your project’s operational readiness at risk.

For More Information, visit: ERCOT NOGRR-245 Compliance

IFRTCR (Initial Frequency Ride-Through Capability Report) – required for frequency compliance (per Nodal Operating Guide §2.6.2.1)
IVRTCR (Initial Voltage Ride-Through Capability Report) – required for voltage compliance (per Nodal Operating Guide §2.9.1.2)

Each form must include:

Resource and site details
Current capability tables
Known technical limitations
OEM/engineering letters or notarized attestations
Planned software, firmware, or hardware modifications
Post-modification capabilities
Implementation schedule
Limitations that cannot be represented in models

Data Gap Analysis – Review and identify missing or incomplete ride-through data in your current submissions

Capability Table Preparation – Create IFRTCR/IVRTCR ride-through capability tables per Nodal Operating Guide requirements

OEM & Engineering Coordination – Work directly with OEMs and engineering teams to obtain signed technical limitation verification letters

Notarized Attestations – Draft and prepare notarized statements when OEM letters are unavailable

Post-Modification Modeling – Develop and submit accurate post-modification models via the RIOO system

Exemption Request Preparation – Complete all exemption forms in compliance with PUCT 25.517(c)(1)-(9)

Internal Compliance Tracking – Use our proprietary NOGRR245 Excel checklist to track every deliverable

Quality Control Review – Conduct a full compliance audit before ERCOT submission to minimize rejection risk

Proven ERCOT Compliance Track Record – Successful delivery on multiple Inverter-Based Resource (IBR), Wind Generation Resource (WGR), and ride-through modeling projects
In-Depth Market Knowledge – Experienced with ERCOT market notices, PUCT regulations, and Nodal Operating Guide requirements
Integrated Technical & Regulatory Expertise – Engineering, modeling, and compliance support in one service package
Fast Turnaround Times – Structured processes to meet urgent ERCOT and NERC compliance deadlines

1. What is NOGRR245?
NOGRR245 is a Nodal Operating Guide Revision Request approved by the Public Utility Commission of Texas (PUCT) that strengthens ERCOT’s ride-through performance requirements for Inverter-Based Resources (IBRs), including frequency ride-through and voltage ride-through capabilities.
2. Who must comply with NOGRR245?
All transmission-connected IBRs, Type 1 Wind Generation Resources (WGRs), and Type 2 WGRs that have submitted an extension request or exemption request under PUCT 25.517(c) must provide complete, resource-specific ride-through capability data to ERCOT by September 15, 2025.
3. What is the compliance deadline?
The final deadline is September 15, 2025. Late or incomplete submissions will be rejected by ERCOT, which may result in denial of your extension or exemption request.
4. What forms are required?
You must submit either:

IFRTCR (Initial Frequency Ride-Through Capability Report) for frequency requirements (§2.6.2.1)
IVRTCR (Initial Voltage Ride-Through Capability Report) for voltage requirements (§2.9.1.2)
5. Where do I send my completed forms?
Send completed IFRTCR or IVRTCR forms to NOGRR245@ercot.com.
6. How do I submit models to ERCOT?
Post-modification models must be submitted via the RIOO system with the label “NOGRR245 Model Submission.”
7. What data must be included in IFRTCR/IVRTCR?
Resource entity details (name, DUNS, site name, unit names)
Current ride-through capability tables per Nodal OG format
All known technical limitations
OEM or engineering verification letters / notarized attestations
Planned modifications and implementation schedule
Post-modification capability tables and models
8. What if my OEM cannot provide a verification letter?
You must submit a notarized attestation signed by your highest-ranking representative explaining:

Efforts taken to obtain the OEM letter
Why those efforts were unsuccessful
Technical limitations of the resource
9. What deficiencies has ERCOT identified in past submissions?
Missing required technical data
Generic, non-resource-specific ride-through data
Data not reflecting Point of Interconnection performance
Delays due to pending OEM model updates without interim dataa
10. Why are ride-through capability tables required?
These tables document your resource’s ability to ride through frequency or voltage disturbances, ensuring compliance with ERCOT’s Nodal Operating Guides.
11. What is PUCT Substantive Rule 25.517(c)?
This rule outlines the process for requesting an exemption from ERCOT reliability requirements and specifies the data, models, and documentation that must be provided.
12. Can I request an exemption after September 15, 2025?
No. ERCOT will not accept any exemption requests after the deadline.
13. What happens if I miss the deadline?
ERCOT may:

Deny your extension or exemption request
Require immediate full compliance
Impose operational restrictions
14. What’s the difference between IFRTCR and IVRTCR?
IFRTCR – Frequency ride-through capability report (§2.6.2.1)
IVRTCR – Voltage ride-through capability report (§2.9.1.2)
15. How does Keentel Engineering assist with compliance?
We provide turnkey ERCOT compliance services, including:

Gap analysis of IFRTCR/IVRTCR submissions
OEM/engineering letter coordination
Notarized attestation preparation
Ride-through table creation per Nodal OG
Post-modification model preparation and RIOO submissions
Full ERCOT & PUCT compliance packages
16. Can I submit generic OEM data?
No. ERCOT requires resource-specific performance data at the Point of Interconnection.
17. What are the risks of providing incomplete models?
Incomplete or inaccurate models may lead ERCOT to reject your submission, delaying approval and forcing immediate compliance without extensions or exemptions
18. What must my model include?
It must reflect post-modification performance and accurately represent all technical limitations.
19. What if my resource is already compliant?
You must submit a statement confirming that your current ERCOT-submitted model fully represents all technical limitations.
20. How can I get started with Keentel Engineering?
Email: contact@keentelengineering.com
Phone: 813-389-7871
Website: www.keentelengineering.com

In 1995, Sandip (Sonny) R. Patel earned his Electrical Engineering degree from the University of Illinois, specializing in Electrical Engineering . But degrees don’t build legacies—action does. For three decades, he’s been shaping the future of engineering, not just as a licensed Professional Engineer across multiple states (Florida, California, New York, West Virginia, and Minnesota), but as a doer. A builder. A leader. Not just an engineer. A Licensed Electrical Contractor in Florida with an Unlimited EC license. Not just an executive. The founder and CEO of KEENTEL LLC—where expertise meets execution. Three decades. Multiple states. Endless impact.

PVsyst v8 Grid-Connected Solar Simulation Guide | Keentel Engineering

ERCOT NOGRR245 Compliance Services – Meet the September 15, 2025 Deadline with Keentel Engineering

Introduction

Why NOGRR245 Matters

What ERCOT Found Missing

What You Must Submit for NOGRR245 Compliance

1. IFRTCR or IVRTCR Forms

2. Accurate Post-Modification Model

3. Exemption Requests (PUCT 25.517(c))

Keentel Engineering’s ERCOT NOGRR245 Compliance Support

Our NOGRR245 Compliance Services Include:

Risks of Non-Compliance with ERCOT NOGRR245

Why Choose Keentel Engineering for ERCOT Compliance

Action Steps Before September 15, 2025

Contact Keentel Engineering Today

Frequently Asked Questions – ERCOT NOGRR245 Compliance

1. What is NOGRR245?