National Grid
Net Meter Installation 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 (and returned a signed Interconnection Service Agreement) under the Expedited or Standard Processes.

If you have not already visited it, please refer to the Construction Process page before proceeding. (In particular, Standard Process applicants should refer specifically to the Witness Test Process page before proceeding.)
  1. For any DG systems that are not interconnected using the Simplified Process, the Massachusetts Department of Public Utilities (DPU) has implemented a new system for determining and tracking Net Metering eligibility. Refer to the Net Metering webpage for more information regarding the MassACA system of assurance. It is the responsibility of the Interconnecting Customer to secure a Net Metering cap allocation (if applicable) prior to National Grid offering Net Metering Services to the host billing account.
  2. For any DG systems that are capable of exporting power (other than net metered customers ≤60 kW in aggregate generation), a dedicated phone line must be installed at the meter. Refer to the Phone Line and RTU Guidance for DG page for more information about phone line and RTU requirements. In any instance where a phone line is required, the Interconnecting Customer must provide the phone number to National Grid.
  3. Once the Interconnecting Customer has completed all of the relevant process steps and fulfilled all of the requirements specific to its IA, National Gridís Distributed Generation Services (DGS) group will request that a new net meter be installed. As part of this request, the DGS group will forward information along to the meter services and account services representatives in order to process the request, including:
    1. Account information (including the Schedule Z)
    2. Contact information
    3. Phone number for the dedicated phone line (if applicable)
    4. An estimated in-service date

    Note 1: For accounts metered via a programmable meter (i.e. meters tied into a CT cabinet or at a service transformer), the preparation work required to install a net meter can be substantial and may require several weeks of lead-time. In such cases, it is strongly recommended that the Interconnecting Customer (or one of its representatives) regularly communicate with the DGS group regarding any changes to the estimated in-service date prior to submitting the project completion documentation.

  4. Once the request for the new meter installation has been submitted, the meter installation is typically scheduled and completed within 15 business days.
  5. Once the new meter has been installed by National Grid, a representative of the DGS group will notify the Interconnecting Customer. (Visit the Project Completion Process page to view information about the remainder of the interconnection 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.

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DISCLAIMER: All content and information provided on this Ďprocessí 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 Gridís 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.