In 2022, Massachusetts had a total summer capacity of 12,767 MW through all of its power plants, and a net generation of 21,026 GWh.
[2] In 2023, the electrical energy generation mix was 76.1% natural gas, 10.2% solar, 4.8% biomass, 2.7% hydroelectric, 1% wind, 0.5% petroleum, and 4.8% other.
The state's last remaining nuclear power plant was retired in May 2019.
[3] Distributed small-scale solar, including customer-owned photovoltaic panels, delivered an additional net 3,668 GWh to the state's electricity grid in 2023.
This compares as about 84 percent more than the amount generated by Massachusetts' utility-scale solar facilities that year.