Massachusetts Department of Public Utilities

Built World

Reviewing long-term contracts for storage projects

Flatiron Energy closed about $850 million in financing on October 15 for Energizar, a battery storage plant in Chelsea, Massachusetts. The project is designed for 250 megawatts and 1,200 megawatt-hours, and Flatiron says it will be the largest battery plant on the East Coast when it opens in late 2027.

Updated Oct 16

Rule Changes

As of September 2026: Regains full safety oversight of MBTA

Four years after a federal investigation found a 'lax safety culture' at the MBTA, the Federal Transit Administration has closed its directive to the Massachusetts Department of Public Utilities and returned daily safety monitoring to the state. The FTA's Sept. 11 letter found the state agency now meets federal standards, though seven directives the FTA issued to the MBTA itself remain open under state supervision.

Updated Sep 22