701 plants · 14.6 GW total capacity
Massachusetts has 701 power plants with 14.6 GW total capacity. The generation mix includes 525 solar, 58 battery, 40 gas plants.
Largest is Canal (1495 MW Residual Oil); oldest active is Cabot Holyoke (1893); newest is Rose Solar (2026); top owner is AES Distributed Energy (36 plants).
25 interconnection queue projects in Massachusetts totaling 8.4 GW of proposed capacity.