National Grid
Simplified 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.


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

In order to submit a successful Simplified 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 three-phase DG system on a single-phase service), 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 upgraded service that is requested for an account with a pending IA will be put on hold until National Grid sends the Interconnecting Customer a Conditional Approval to Interconnect.

  2. The Interconnecting Customer should review the Terms and Conditions for the Simplified Process (in Exhibit A of the Interconnection Tariff).
  3. Prepare the Interconnecting Customer’s IA materials (and have these materials initialed and signed by the appropriate parties).
    1. Exhibit A – Simplified Interconnection Application (IA) form
    2. Exhibit H – Retail Customer Agreement (if applicable)
    3. Schedule Z – Information Required for Net Metering Service form
    4. Recent copy of the retail customer’s electric bill (for existing customers only)
    5. Exhibit I - Landowner Consent Agreement

    Note 2: In the Simplified Process, the Exhibit H must be submitted with the other IA materials in any instance where the owner and/or operator of the DG system is not the named responsible party on the host retail electric billing account (also known as the “Host Customer” or “Retail Customer”).

  4. Submit all of the Interconnecting Customer’s IA materials and proposed design diagrams (refer to the Pre-Application Process page if necessary) to National Grid via email at Distributed.Generation@nationalgrid.com:
    1. One-Line Diagram (P.E.-Stamp recommended, but not required for a Simplified Process IA)
    2. Site Plan
    3. Exhibit A (IA Form)
    4. Exhibit H (if applicable)
    5. Schedule Z
    6. Exhibit I (if applicable)
    7. Any other information pertinent to the application (if applicable)
  5. 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 about the status of the application and provide an application number.
    1. Once all the initial documents (see above) are received and approved, the application is considered complete (application not project).
    2. A representative of the DGS group will counter-sign and return the IA Form. (Visit the Project Completion Process page to view the next step of the process.)

    Note 3: If minor System Modifications are required to interconnect the proposed DG system to the National Grid Electric Power System, the Interconnecting Customer should refer to the “Simplified Process” section of the Interconnection Tariff for more information.

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.