National Grid
Standard Application Process

The information contained or referred to herein is for reference purposes only, and shall not be relied upon for any purposes. The user of this webpage should independently verify all information before proceeding forward with any project.


All Applications Must Be Submitted Through Our Customer Application Portal.

Unsure how to use the portal? Watch this video for step-by-step instructions.
Questions? Visit our help page.

If you have not already visited it, please refer to the Pre-Application Process page before proceeding.

In order to submit a successful Standard Process Interconnection Application (IA) to interconnect a distributed generation (DG) system, please complete the following steps in order:
  1. If the customer is in need of a new electrical service (e.g. there is no existing electric account at the proposed project location) or upgraded electrical service (e.g. proposing to install a 500kW DG system behind an existing residential meter), request it before proceeding! New customers are not required to send a copy of a recent electric bill, but they must provide a Work Request number and pending Account Number on the IA form. (Please contact customer service at 1-800-322-3223 to create the Work Request Number and to receive the Pending Account Number. More information can be found on the Apply for Service page.)

    Note 1: Any new or upgraded service that is requested for an account with a pending IA will be put on hold until the Interconnecting Customer signs an Interconnection Service Agreement.

  2. Prepare the Interconnecting Customer’s IA materials (and have these materials initialed and signed by the appropriate parties).
    1. Exhibit C – Expedited/Standard Interconnection Application (IA) form
    2. Legal Information Document
    3. Schedule Z – Information Required for Net Metering Service form
    4. Exhibit I - Landowner Consent Agreement
    5. IA fee check made payable to National Grid
      1. $4.50 per kW(AC) – Minimum $300 / Maximum: $7,500
      2. Pay online through JPMorganChase or you can mail your check to the below address. If mailing a check, please scan the check before mailing it and upload an image of the check to the Portal. Note that this image file must be in a .jpeg, .png, .gif or .jpg format.
    6. National Grid
      Attn: Mark Cook
      PO Box 29805
      New York, NY 10087-29805

    Note 2: In order to proceed directly to the Standard Process (as opposed to the Expedited Process), ensure that the “Yes” option is checked on the IA form for the statement: “I am opting to forego the Expedited Process. Please review this application under the Standard Process.”



    Note 3: In the Standard Process, the Exhibit H should NOT be submitted with the other IA materials; it will be provided by National Grid as part of the Interconnection Service Agreement. However, contact information for the named responsible party on the host retail electric billing account (also known as the “Host Customer” or “Retail Customer”) should be provided in the IA form and the Legal Information Document.

  3. Submit all of the Interconnecting Customer’s IA materials and proposed design diagrams (refer to the Pre-Application Process page if necessary).
    1. Submit the following materials to National Grid Customer Application Portal.
      1. Copy of any Pre-Application Reports related to the application provided by National Grid
      2. P.E.-stamped One-Line Diagram and Three-Line Diagram
      3. Site Plan
      4. Technical Specifications (pdf files only)
      5. Exhibit C (IA Form)– with Standard Process requested!
      6. Legal Information Document
      7. Schedule Z
      8. Exhibit I (if applicable)
      9. Copy of IA fee check
      10. Any other information pertinent to the application (if applicable)
  4. Once the IA materials are received at National Grid, a representative of National Grid’s Distributed Generation Services (DGS) group will communicate with the contacts listed on the IA form and Legal Information Document about the status of the application.
    1. Once all the initial documents (see above) are received and approved, the application is considered complete (application not project).
    2. Complete applications are forwarded to a Technical Support Consultant (in the Technical Sales & Engineering Support department – part of the DGS group) to perform an initial technical review.
  5. Once the initial technical review is completed, National Grid will offer the Interconnecting Customer an executable Exhibit E – Impact Study Agreement, including a cost estimate and anticipated timeline for the Impact Study.
    1. Upon the receipt of a signed Exhibit E, National Grid will prepare and issue an invoice (as per the payment terms offered in the Exhibit E and as indicated on the Legal Information Document).
    2. The Interconnecting Customer pays the invoiced cost in full.
    3. The Interconnecting Customer may be required to provide additional information, documentation, and/or corrections (as identified during the initial technical review) before proceeding.
    4. Upon receipt of the full payment (and all necessary revised documentation), National Grid will initiate the Impact Study. (Visit the Study Process page to view the next step of the process.)
Please refer to the Interconnection Documents webpage for a list of all relevant interconnection process documents.

Please refer to the Interconnection Process webpage for a high-level overview of the distributed generation (DG) interconnection process.

Contact E-mail: Distributed.Generation@nationalgrid.com

DISCLAIMER: All content and information provided on this ‘process’ webpage, including links to other National Grid webpages or documents and all of the content and information provided therein, is solely to provide customers, contractors, and other parties with additional useful guidance regarding National Grid’s typical distributed generation interconnection process and matters related thereto. In all instances, the content and information provided by National Grid is superseded by the applicable laws, rules, regulations, tariffs, and regulatory decisions governing the distributed generation interconnection process and all matters related thereto in the relevant jurisdictions, all as may be amended from time to time. The content and information contained herein is not intended to be all inclusive of every process or action available to users with respect to the interconnection of distributed generation. It is the sole responsibility of users of this website to independently verify the process to interconnect its distributed generation, as well as the status of any changes, pending changes, or updates to the process described herein. National Grid shall not be held liable under any circumstances for any errors, omissions, inaccurate, and/or out-dated content or information provided herein.