Overview of solar power in the U.S. state of Massachusetts
Solar power in Massachusetts has been increasing rapidly, due to Section 1603 grants for installations that began before December 31, 2011,[2] and the sale of SRECs for $0.30/kWh,[3] which allows payback for the system within 5 or 6 years, and generates income for the life of the system. For systems installed after December 31, 2011, and before December 31, 2016, the 30% tax grant becomes a 30% tax credit. There has been an appeal to the Congress to extend the 1603 program, the grant program, for an additional year.[4][5]
Net metering is available with no aggregate limit for systems less than 10 kW, or three phase connected systems less than 25 kW. Larger systems are limited to 3% of total peak load.[6] Approximately 40 municipalities are exempt from net metering. Of these, most choose not to offer it.
The first solar park in the country is the 100 kW array installed in 1981 at Beverly High School.[7] The largest campus to have a solar program is Harvard's 555 kW array.[8][9]
Massachusetts' largest privately owned solar array is the 7.1 MW Happy Hollow Community Solar and Storage Farm, completed in March 2019.[10] The town of Harvard, Massachusetts has the most solar installations with 75 planned, of which 21 have been installed.[11] Holyoke is home to two arrays which total 4.5 MW which were completed on December 20, 2011.[12] A 1.8 MW solar farm in Pittsfield was completed in 2010.[citation needed] A 5.75 MW solar park in Canton was completed in 2012.[13][14] Two 6 MW solar parks are being built, one in Berkley, and the other in Carver.[15] As of August 2012, a total of 129 MW has been installed in the state.[16]
State officials had set a target of installing 250 MW of solar PV statewide by 2017 and in May 2013 upped the target to 1,600 MW by 2020 as the 250 MW goal had been met four years ahead of schedule.[17] Exceeding projections again, cumulative solar PV capacity in the state reached over 2 GW (2,000 MW) at the end of 2017.[18] The American Solar Energy Industries Association forecasts that another ~1.5 GW of solar PV will be installed in the state over the next four years (2018-2021).[19]
The U.S. Energy Information Administration meanwhile reports that solar power, including both utility-scale and small-scale projects, accounted for 7.7% of the electricity generated in Massachusetts in 2017 - the 5th highest percentage nationwide among the 50 states.[20][21][22]
Massachusetts has a robust program for solar on closed landfills, with more than 80 projects with over 250 MW of capacity.[23]