Utility Interconnection in Massachusetts

Here you will find information regarding Interconnection in Massachusetts.

Table of Contents


Interconnection is the process of connecting a distributed generation system to the electric grid. Prior to connecting, the distributed generation system owner must obtain written approval from the local utility in the form of an Interconnection Service Agreement and subsequent Authorization to Connect. While emergency generators are not required to follow this process, customers installing emergency generation should contact their utility.

The interconnection process is necessary to protect the reliability and safety of the electric grid. The Massachusetts Department of Public Utilities (DPU) regulates this process by requiring utilities to have standardized interconnection tariffs.

DER Interconnection Seminars Calendar

As part of an agreement filed by the DG Working Group in September 2013 utilities host Interconnection Workshops on a monthly basis. 

2024 Schedule of Workshops

February 7, 2024Eversource East: Simplified
March 13, 2024Eversource West: Expedited/Standard
April 11, 2024National Grid: Standard/Complex 
May 3, 2024MA-DPU: Solar and DG in Massachusetts 
May 8, 2024Eversource East: Expedited/Standard
June 12, 2024Eversource West: Simplified
July 18, 2024National Grid: Simplified, Register at MA DG Stakeholder Meetings
August 21, 2024Eversource West: Expedited/Standard, Email Elaine.Zimmerman@Eversource.com
September 18, 2024Eversource East: Simplified, Email Elaine.Zimmerman@Eversource.com
October 17, 2024National Grid: Standard/Complex, Register at MA DG Stakeholder Meetings
November 20, 2024Eversource West: Simplified, Email Elaine.Zimmerman@Eversource.com
December 11, 2024Eversource East: Expedited/Standard, Email Elaine.Zimmerman@Eversource.com

Utility Interconnection Reports

On the 15th of each month, the Electric Distribution Companies provide monthly interconnection reports.  Information pertaining to these reports are provided below.

Aggregated RAW DATA set through April 2024 (posted 5/17/24)

Utility Reporting Accuracy Email from DOER to EDCs (06/14/2023)

Hosting Capacity Maps

As of November 2019, the electric utilities in Massachusetts are now making Hosting Capacity Maps available for review.

Utility Interconnection Information Websites

MA Technical Standards Review Group

For information on the Common Technical Standards and the Technical Standards Review Group (TSRG), please visit the web page of the MA TSRG.


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