Approved Aggregation Documents

To implement Sherborn Power Choice, the Town had to develop an Aggregation Plan and submit it, along with supporting documents, to a state regulatory approval process. Sherborn’s Aggregation Plan was approved by the Massachusetts Department of Public Utilities on 12/27/23. The approved documents are as follows:

Aggregation Plan (PDF)
Education and Outreach Plan (PDF)

Electricity Supply Contract

The Town of Sherborn signed a 24-month electricity supply contract with Gridwealth Electric. The contract is in effect from June 2024 – June 2026 meter reads. Download the contract. (PDF)

  • Actual program prices charged include a $0.001/kWh operational adder.

How Aggregation Works

Municipal electricity aggregation is a form of group electricity purchasing. Electricity aggregation replaces your electricity supplier, and it changes the price that Eversource uses to calculate the Supply charge on your electric bill. In addition, aggregation can increase the amount of renewable energy in your electricity supply. But electricity aggregation does not replace Eversource as your electric utility. Learn more about how aggregation works.

Example Eversource bill

Learn how to find Sherborn Power Choice on your Eversource electric bill, and how to use your bill to figure out which program option you are enrolled in using this example Eversource bill.


Explore common electricity-related terms and what they mean on the Definitions page.

Tax-exempt account

Learn where to submit your tax-exemption documentation to maintain your account’s tax-exempt status in Sherborn Power Choice on the Tax-Exempt Accounts page.

Program implementation process

Implementing a municipal electricity aggregation program like Sherborn Power Choice is a regulated process that is overseen by the Massachusetts Department of Public Utilities (DPU). Learn more about the steps in the process.

Current Energy Mix Disclosure Label

This document is prepared and periodically updated by the program’s electricity supplier. It provides detail on the energy mix for all program options. Because these documents are updated only periodically, the currently available document may be for an earlier period of time. (Gridwealth Electric has not yet issued a disclosure label. Please check back soon.) (PDF)

Massachusetts Department of Public Utilities (DPU) Basic Service pricing information

The Massachusetts Department of Public Utilities (DPU) provides a Basic Service Information and Rates web page that includes an explanation of what Basic Service pricing is and what the components of the price are. On this page, you can also download an Excel spreadsheet that includes the current Basic Service prices for all Massachusetts utilities. Go to the page.