Interconnection Guide for
Distributed Generation

This guide provides information on the Massachusetts interconnection process for customers and developers. This process is an essential step when installing solar, small wind, and other on-site generation technologies classified as distributed generation (DG). Every distributed generation installation must be reviewed and approved for interconnection to the distribution system by the local electric utility, in addition to the appropriate local municipal inspectors.

For those interested in Commonwealth Solar, this is the place to learn about the separate application that must be submitted to the electric utility to start the formal interconnection process, and to learn about the time frames listed in the Interconnection Tariff.

For those who want to jump directly to the Interconnection Tariffs for each electric utility, which provide all the standards, rules and other details about the Massachusetts uniform interconnection process: