National Grid
Project Completion 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.

The information on this page only applies to distributed generation (DG) Interconnection Applications (IA) that have already received a counter-signed IA form under the Simplified Process or that have already received a Conditional Approval under the Expedited or Standard Processes.

If you have not already visited it, please refer to the Construction Process page before proceeding.
  1. Once the Interconnecting Customer's DG system has been constructed and installed, it is the responsibility of the Interconnecting Customer or one of its representatives (e.g. the installer) to submit the appropriate project completion documentation for review by National Grid prior to energizing the system (other than for testing purposes). Please refer to the Completion Documentation page for more information.
  2. Additionally, Interconnecting Customers that have applied for Net Metering must wait for their traditional, detented utility revenue meter to be replaced with a new bi-directional net meter. Attempting to operate a DG system behind a traditional meter may result in billing issues! Please refer to the Net Meter Installation Process page for more information.
  3. Note 1: Qualifying Facilities may also need to have a new meter installed to properly register their generation. Please also refer to the links above for more information

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  4. Once the Interconnecting Customer has completed all of the relevant process steps and fulfilled all of the requirements specific to its Interconnection Application, National Grid will issue an Authorization to Interconnect. Interconnecting Customers are NOT permitted to operate any generation capacity prior to receiving an official Authorization to Interconnect and will be held liable for any damages that may occur as a result of unauthorized operation. (Visit the Authorization to Interconnect page to view the next step in 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.