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New York NYISO Small Generating Facility Interconnection Request (8-NY-h)

Information current as of 2022
In New York, a person (developer) may need to submit a Small Generator Interconnection Request (SGIR) to the New York Independent System Operator (NYISO) to connect a new small generating facility of 20 MW or less to the NYS Transmission System or the Federal Energy Regulatory Commission (FERC) Jurisdictional Distribution System. A SGIR may also be necessary to increase the capacity of, or make a material modification to the operating characteristics of, an existing small generating facility. A small generating facility is a generating facility with the capacity of no more than 20 MW. NYISO Open Access Transmission Tariff (OATT) § 32.1.


NYISO’s Small Generator Interconnection Procedures (SGIP) apply to interconnections of small generating facilities to the NYS Transmission System, and interconnections to the Distributed System subject to FERC jurisdiction. NYISO Open Access Transmission Tariff (OATT) § 32.1.1.


The SGIP applies to a proposal to increase the capability of an existing generation facility only if the resultant size of the facility is 20 MW or less. A proposal to increase the capability of an existing generation facility would fall under the Large Generator Interconnection Procedures (LGIP) if the resultant size of the facility is more than 20 MW, even though the incremental increase in capability may be less than 20 MW. NYISO Transmission Expansion and Interconnection Manual, at § 3.4.1.1.



NYISO Small Generating Facility Interconnection Request Process


8-NY-h.1 to 8-NY-h.4 — Does the Developer Request a Pre-Application Report?

A developer may submit a Pre-Application Report Request along with a non-refundable fee of $1,000 for a pre-application report of a project at a specific site. NYISO Open Access Transmission Tariff (OATT) § 32.1.1. The Pre-Application Report Request must include the information provided pursuant to NYISO Open Access Transmission Tariff (OATT) §§ 32.1.2.2.1 – 32.1.2.2.9 to clearly and sufficiently identify the location of the point of interconnection. NYISO Open Access Transmission Tariff (OATT) § 32.1.2.2. The information required for the Pre-Application Report Request includes, but is not limited to:

  • Project contact information, including name, address, phone number, and email address;
  • Project location (street address with nearby cross streets, town, and county);
  • Meter number, pole number, or other equivalent information identifying proposed point of interconnection, if available;
  • Generator type;
  • Size (alternating current kW); and
  • Single or three phase generator configuration.

NYISO Open Access Transmission Tariff (OATT) §§ 32.1.2.2.1 – 32.1.2.2.9.

Within two (2) business days of receiving the Pre-Application Report Request, NYISO must provide a copy of the Pre-Application Report Request to the appropriate Connecting Transmission Owner (CTO). The CTO must return the Pre-Application Report, completed to the extent required under NYISO Open Access Transmission Tariff (OATT) § 32.1.2.2 within 15 business days of receipt of the Pre-Application Report Request from NYISO. NYISO Open Access Transmission Tariff (OATT) § 32.1.2.2.

The Pre-Application Report produced by NYISO, in consultation with the appropriate CTO, is non-binding, does not confer any rights, and the developer must still successfully apply to interconnect to the CTO’s system. NYISO Open Access Transmission Tariff (OATT) § 32.1.2.2.

8-NY-h.5 to 8-NY-h.8 – Small Generator Interconnection Request (SGIR)

The developer proposing to interconnect a new small generating facility to the NYS Transmission System or FERC-jurisdictional Distribution System, or increase the capacity of, or make a material modification to the operating characteristics of, an existing small generating facility, must submit a Small Generator Interconnection Request (SGIR) to NYISO. Along with the SGIR the developer must also submit the required processing fee or study deposit. In addition, the developer must also demonstrate site control. NYISO Transmission Expansion and Interconnection Manual, at § 3.4.2; NYISO Open Access Transmission Tariff (OATT) § 32.1.3.

The developer may demonstrate site control through:

  • Ownership of, a leasehold interest in, or a right to develop a site for the purpose of constructing the small generating facility;
  • An option to purchase or acquire a leasehold site for such purpose; or
  • An exclusivity or other business relationship between the developer and the entity having the right to sell, lease, or grant the developer the right to possess or occupy a site for such purpose.

NYISO Open Access Transmission Tariff (OATT) § 32.1.5.

NYISO must date-and-time stamp the developer’s SGIR upon receipt and send a copy of the SGIR to the appropriate CTO. NYISO must notify the developer that NYISO received the SGIR within three (3) business days of receiving the SGIR. NYISO Open Access Transmission Tariff (OATT) § 32.1.3.

8-NY-h.9 to 8-NY-h.12 – Provide Notice of SGIR Completeness Determination

After consulting with the CTO, NYISO must notify the developer within ten (10) business days of the receipt of the SGIR as to whether the SGIR is complete or incomplete. If the SGIR is incomplete, NYISO must provide along with the notice that the SGIR is incomplete, a written list detailing all information that the developer must provide for NYISO to deem the SGIR complete. NYISO must consider a SGIR complete upon submission of the listed information to NYISO. NYISO Open Access Transmission Tariff (OATT) § 32.1.3.

If the developer provides additional information for an initially incomplete SGIR, NYISO reviews the additional information and notifies the developer whether the SGIR is now complete or incomplete. NYISO Transmission Expansion and Interconnection Manual, at Attachment E.

The developer has ten (10) business days after receipt of the notice to submit the listed information or to request an extension to provide such information. If the developer does not provide the listed information or a request for an extension of time within the ten (10) days, NYISO will consider the SGIR withdrawn. NYISO Open Access Transmission Tariff (OATT) § 32.1.3.

8-NY-h.13 – Does the Facility Meet the Requirements for the Fast Track Process?

A fast track process is available to a developer proposing to interconnect a small generating facility with a CTO’s distribution system. If the small generating facility’s capacity does not exceed the size limits identified pursuant to NYISO Open Access Transmission Tariff (OATT) § 32.2.1 the developer should proceed to element 8-NY-h.16. NYISO determines fast track process eligibility based upon the generator type, the size of the generator, voltage line and location of and type of line at the point of interconnection. A small generating facility meets the requirements for the fast track process, if the facility is 2 MW or less connecting to the NYS distribution system and meets certain qualifications outlined in NYISO Open Access Transmission Tariff (OATT) § 32.2. NYISO Open Access Transmission Tariff (OATT) § 32.2.1.

However, all small generating facilities connecting to lines greater than 69 kilovolt (kV) are ineligible for the fast track process, regardless of size. NYISO Open Access Transmission Tariff (OATT) § 32.2.1.

If the small generating facility project meets the requirements for the fast track process, the developer should proceed to 8-NY-h.37 – Perform Initial Review. The fast track process is the procedure for evaluating an interconnection request for a certified small generating facility that meets the eligibility requirements of NYISO Open Access Transmission Tariff (OATT) § 32.2.1 of the SGIP and includes the NYISO Open Access Transmission Tariff (OATT) § 32.2 screens, customer options meeting, and optional supplemental review. NYISO Open Access Transmission Tariff (OATT) Appendix 1.

If the small generating facility does not meet the fast track process requirements, the developer should follow the provisions for the small generating facility study process pursuant to NYISO Open Access Transmission Tariff (OATT) § 32.3. NYISO Open Access Transmission Tariff (OATT) § 32.1.1.1. The study process is a procedure for evaluating an interconnection request that includes NYISO Open Access Transmission Tariff (OATT) § 32.3, a scoping meeting, Feasibility Study (FES), and Facilities Study (FS). NYISO Open Access Transmission Tariff (OATT) Appendix 1.


8-NY-h.14 to 8-NY-h.16 – Is a Scoping Meeting Required?

NYISO will coordinate with the developer and the CTOs to determine whether the Parties (NYISO, CTO, and the developer) mutually agree to omit the scoping meeting and proceed directly to the FES. NYISO Open Access Transmission Tariff (OATT) § 32.3.2.3; NYISO Transmission Expansion and Interconnection Manual, at Attachment E. If the Parties decide to omit the scoping meeting continue to 8-NY-h.19.

Otherwise, NYISO will hold a scoping meeting within ten (10) business days after NYISO deems the SGIR is complete, or as mutually agreed to by the Parties. NYISO Open Access Transmission Tariff (OATT) § 32.3.2.1. The purpose of the scoping meeting is to discuss the SRIG and review existing studies relevant to the SRIG. The Parties must discuss whether NYISO should perform a Feasibility Study (FES) or proceed directly to a System Impact Study (SIS), or a Facility Study (FS), or an Interconnection Agreement. NYISO Open Access Transmission Tariff (OATT) § 32.3.2.2. At the scoping meeting, NYISO, the CTO, and developer will bring to the meeting personnel, including system engineers and other resources as may be reasonably required to accomplish the purpose of the meeting. NYISO Open Access Transmission Tariff (OATT) § 32.3.2.1.

Before a CTO participates in a scoping meeting with its affiliates, NYISO will post on its OASIS an advance notice of the CTO’s intent to do so. NYISO Open Access Transmission Tariff (OATT) § 32.3.2.1.

8-NY-h.17 to 8-NY-h.19 – Is a Feasibility Study (FS) Required?

Unless the Parties agree to skip the FS, NYISO will provide the developer and CTO, as soon as possible, but not later than five (5) business days after the scoping meeting, a Feasibility Study Agreement (FESA) including an outline of the scope of the study and a non-binding good faith estimate of the cost to perform the study. NYISO Open Access Transmission Tariff (OATT) § 32.3.2.2. If the Parties decide to omit the FS continue to 8-NY-h.24. If the Parties decide to omit the FS continue to 8-NY-h.24.

Note: NYISO may require a deposit of the lesser of 50 percent of the good faith estimated FES costs or earnest money of $1,000 from the developer. NYISO Open Access Transmission Tariff (OATT) § 32.3.3.2.

If the developer requests a FES, in order to remain in consideration for interconnection, a developer must return an executed FESA within 15 business days. NYISO Open Access Transmission Tariff (OATT) § 32.3.2.3.

8-NY-h.20 to 8-NY-h.21 – Conduct Feasibility Study (FES)

Within 30 days of receipt of executed FESA, NYISO and the appropriate CTO must conduct the Feasibility Study (FES) and then provide the FES Report to the developer. NYISO Transmission Expansion and Interconnection Manual, at Attachment E.

The FES must identify any potential adverse system impacts that would result from the interconnection of the small generating facility. NYISO Open Access Transmission Tariff (OATT) § 32.3.3.1.

The scope of and cost responsibilities for the FES must comply with the FESA pursuant to NYISO Open Access Transmission Tariff (OATT) Appendix 6. NYISO Open Access Transmission Tariff (OATT) § 32.3.3.3.

8-NY-h.22 to 8-NY-h.23 – Is a System Impact Study (SIS) Required?

If the FES shows no potential for adverse system impacts and/or the Parties agree no SIS is required, NYISO must notify the developer and CTO within five (5) business days of the completion of the FES that the SIS has been waived. If the SIS is not required, the developer should go to 8-NY-h.30. NYISO Open Access Transmission Tariff (OATT) § 32.3.3.4.

If the FES shows the potential for adverse system impacts, the Parties will proceed to the appropriate SIS review process. NYISO Open Access Transmission Tariff (OATT) § 32.3.3.5.

8-NY-h.24 to 8-NY-h.25 – System Impact Study Agreement (SISA)

If the Parties (NYISO, CTO, and developer) decide not to perform the FES, then NYISO will provide the developer and CTO a System Impact Study Agreement (SISA) within five (5) business days after the scoping meeting. In addition, if the FES shows the potential for adverse system impacts, the Parties will proceed to the appropriate SIS review process. NYISO Open Access Transmission Tariff (OATT) § 32.3.3.5.

The SISA must include an outline of the scope of the study and a non-binding good faith estimate of the cost to perform the study. NYISO Open Access Transmission Tariff (OATT) § 32.3.2.3.

The developer must return an executed SISA and deposit for the estimated cost of the SIS to NYISO within 30 business days of receipt of the SISA. NYISO Open Access Transmission Tariff (OATT) § 32.3.4.6; NYISO Transmission Expansion and Interconnection Manual, at Attachment E.


8-NY-h.26 to 8-NY-h.27 – Conduct SIS

NYISO must conduct the SIS in coordination with the CTO, and any affected systems as applicable, within 30 business days of full execution of the SISA for a distribution SIS and/or 45 business days for a transmission SIS. NYISO Transmission Expansion and Interconnection Manual, at Attachment E. NYISO must conduct the SIS in accordance with the SISA, and NYISO Open Access Transmission Tariff (OATT) § 32.3.4.

The SIS must identify and detail the electric system impacts that would result if the proposed small generating facility were interconnected without project modifications or electric system modifications, focusing on the adverse system impacts identified in the FES, or to study potential impacts, including but not limited to those identified in the scoping meeting. A SIS must evaluate the impact of the proposed interconnection on the reliability of the electric system. NYISO Open Access Transmission Tariff (OATT) § 32.3.4.1.

After conducting the SIS, NYISO must prepare and issue a SIS report to the developer and CTO within five (5) days of the completion of the SIS. NYISO Open Access Transmission Tariff (OATT) § 32.3.5.1.

8-NY-h.28 to 8-NY-h.30 – Is a Facilities Study (FS) Required?

If a Facilities Study (FS) is required, NYISO must send the developer and CTO a Facilities Study Agreement (FSA) within five (5) business days of the scoping meeting, completion of the FES, or completion of the SIS, as applicable. NYISO Open Access Transmission Tariff (OATT) §§ 32.3.3.4.

The FSA must include an outline of the scope of the study and a non-binding good faith estimate of the cost to perform the study. NYISO Open Access Transmission Tariff (OATT) § 32.3.3.4. The developer must return the executed FSA to NYISO, or request an extension of time within 30 business days. NYISO Open Access Transmission Tariff (OATT) § 32.3.5.2. Note, NYISO may require the developer to submit a deposit of the good faith estimated costs for the FS. NYISO Open Access Transmission Tariff (OATT) § 32.3.5.5.

If an FS is not required, the developer should go to 8-NY-h.35 – Small Generator Interconnection Request Agreement (SGIA).

8-NY-h.31 to 8-NY-h.32 – Conduct Facilities Study (FS)

NYISO must conduct the Facilities Study (FS) in coordination with the CTO, and any affected systems as applicable within 30 days without upgrades, and within 45 days with upgrades. The facility study must specify and estimate the cost of the equipment engineering, procurement and construction work needed to implement the conclusions of the SISs, as appropriate. NYISO Transmission Expansion and Interconnection Manual, at Attachment E.

NYISO must then provide the FS Report to the developer. NYISO Transmission Expansion and Interconnection Manual, at Attachment E.

8-NY-h.33 to 8-NY-h.36 –Small Generator Interconnection Agreement (SGIA)

As soon as practicable upon completion of all required interconnection studies, NYISO must tender to the developer and CTO a draft Small Generator Interconnection Agreement (SGIA). NYISO Open Access Transmission Tariff (OATT) §§ 32.4.8.

The developer must sign and return the SGIA to NYISO, or request NYISO file an unexecuted SGIA with FERC within six (6) months (180 days) after tender of the draft SGIA. NYISO Open Access Transmission Tariff (OATT) §§ 32.4.8. If the developer does not sign and return the SGIA or request NYISO file an unexecuted SGIA within six (6) months (180 days), NYISO will consider the SGIR withdrawn. NYISO Open Access Transmission Tariff (OATT) §§ 32.4.8.

After the SGIA is signed by the Parties, the developer must adhere to the provisions of the SGIA. NYISO Open Access Transmission Tariff (OATT) §§ 32.4.8. NYISO and CTOs, upon execution of the SGIA or upon request to file an unexecuted SGIA with FERC, will file the SGIA with FERC, if required. NYISO Transmission Expansion and Interconnection Manual, at Attachment E.

8-NY-h.37 to 8-NY-h.42 – Perform Initial Review

Within fifteen (15) business days after NYISO notifies the developer it has received a complete Small Generator Interconnection Request (SGIR), NYISO in consultation with the CTO must perform an initial review using the screens set forth in NYISO Open Access Transmission Tariff (OATT) § 32.2.2.1. NYISO Open Access Transmission Tariff (OATT) § 32.2.2.

After the initial review, NYISO must notify the developer of the results of the review, and include with the notification copies of the analysis and data underlying the determinations under the screens. NYISO Open Access Transmission Tariff (OATT) § 32.2.2.

If the proposed interconnection passes the screens, NYISO approves the SGIR and provides an executable Small Generator Interconnection Agreement (SGIA) to the developer and the CTO within five (5) business days of completing the initial review. NYISO Open Access Transmission Tariff (OATT) § 32.2.2.2.

However, if the proposed interconnection fails the screens, NYISO must consult with the CTO and affected systems as appropriate, and determine whether the project may nevertheless be interconnected consistent with safety, reliability, and power quality standards. NYISO Open Access Transmission Tariff (OATT) § 32.2.2.3. If NYISO determines that the project may be interconnected consistent with the applicable SGIP standards, even if the interconnection fails the screens, NYISO will provide an executable SGIA to the developer and CTO within five (5) days of the determination. NYISO Open Access Transmission Tariff (OATT) § 32.2.2.3.


8-NY-h.43 to 8-NY-h.44 – Notify Developer of Determination

If the proposed interconnection fails the screens, but NYISO, in consultation with CTO, does not or cannot determine from the initial review that the small generating facility may nevertheless be interconnected consistent with safety, reliability, and power quality standard unless the developer is willing to consider minor modifications or further study, NYISO must provide the developer with the opportunity to attend a customer options meeting. NYISO Open Access Transmission Tariff (OATT) § 32.2.2.4. Specifically, if NYISO, in consultation with the CTO, determines the SGIR cannot be approved without minor modifications at minimal cost, supplemental study or other additional studies or actions, or incurring significant cost to address safety, reliability, or power quality problems, NYISO must notify the developer of that determination within five (5) business days after the determination and provide copies of all data and analyses underlying NYISO’s decision. NYISO Open Access Transmission Tariff (OATT) § 32.2.3.

Within ten (10) business days of NYISO’s determination, NYISO must offer to convene a customer options meeting with the developer and CTO to review possible facility modifications or the screen analysis and related results, to determine, in consultation with the CTO, what further steps are needed to permit the small generating facility to be connected safely and reliably. NYISO Open Access Transmission Tariff (OATT) § 32.2.3.

8-NY-h.45 – Hold Customer Options Meeting (If Applicable)

At the customer options meeting, the Parties will pursue one of three options:

  • CTO must offer to perform modifications and provide a non-binding good faith estimate of the limited cost to make such modifications to the CTO’s electric system. If the developer agrees to pay for the modifications to the CTO, NYISO will provide the developer and CTO an executable SGIA within ten (10) days of the customer options meeting;
  • NYISO must offer to perform a supplemental review in accordance with NYISO Open Access Transmission Tariff (OATT) § 32.2.4 and provide a non-binding good faith estimate of the costs of such review; or
  • NYISO must offer to continue to evaluate the SGIR under NYISO Open Access Transmission Tariff (OATT) § 32.3 of the Study Process.

NYISO Open Access Transmission Tariff (OATT) § 32.2.3.1.

If the developer does not agree to pursue one of the three options, above, the SGIR is withdrawn. NYISO Open Access Transmission Tariff (OATT) § 32.2.3.1.

8-NY-h.46 to 8-NY-h.50 – Supplemental Review Agreement

If the developer agrees to the supplemental review, the developer must agree in writing and submit a deposit to NYISO for the estimated costs of the supplemental review in the amount of the good faith estimate for the costs of such review by NYISO, in consultation with the CTO, both within fifteen (15) business days of the offer. If the developer does not submit the written agreement and deposit to NYISO within fifteen (15) business days, the SGIR will continue to be evaluated under NYISO Open Access Transmission Tariff (OATT) § 32.3 of the Study Process unless otherwise withdrawn. NYISO Open Access Transmission Tariff (OATT) § 32.2.4.1. The developer is responsible for NYISO’s and CTO’s actual costs for the supplemental review conducted by NYISO. NYISO Open Access Transmission Tariff (OATT) § 32.2.4.3.

Within 30 business days following receipt of the deposit for a supplemental review, NYISO, in consultation with the CTO, must:

  • Perform a supplemental review using the screens pursuant to NYISO Open Access Transmission Tariff (OATT) § 32.2.4;
  • Notify in writing the developer of the results; and
  • Include with the notification copies of the analysis and data underlying NYISO’s and CTO’s determination under the screens.

If NYISO determines that the project can be interconnected:

  • Without modifications, NYISO provides an executable SGIA to the developer and the CTO within five (5) business days of the determination;
  • With modifications to the small generating facility, NYISO provides an executable SGIA to the developer and the CTO within five (5) business days of receiving the developer’s supplemental review agreement;
  • With modifications to the CTO’s system, NYISO provides an executable SGIA to the developer and the CTO within ten (10) business days.

NYISO Open Access Transmission Tariff (OATT) § 32.2.4.1.1-2.2.4.1.3.

If NYISO determines that the project cannot be interconnected safely and reliably even with modifications, then evaluation of the SGIR continues under the Study Process, and the developer should go to 8-NY-h.16, to review the Study Process.


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