SolarData USA

Solar Energy in Massachusetts - Installation Data & Costs

Total Installations
140,908
Total Capacity
3,954 MW
Average Cost
$4.31/W

Median: $4.17/W

National Rank
#6

92% residential

28.25¢
Electricity Rate (kWh)
3.8h
Peak Sun Hours/Day
9.6 yrs
Est. Payback Period
$8,808
Est. Annual Savings

Environmental & Community Impact

CO₂ Offset/Year
4,420,603 tons
CO₂ Offset/System/Year
22.1 tons
Installations per 10K Residents
201.8
State Population
6,984,205
Est. Annual Production/System
31,180 kWh

Estimates based on average system size, 3.8h peak sun hours/day, 80% derating factor, and 30% federal ITC. Sources: NREL, EIA, EPA eGRID (0.709 metric tons CO₂/MWh).

System Overview

Avg System Size
28.1 kW
Battery Adoption
2.9%
Third-Party Owned
52.7%

Cost Trend ($/W)

Avg Cost per Watt

200120032005200720092011201320152017201920212022

Installation Growth (Last 5 Years)

Top Solar Installers in Massachusetts

InstallerInstallations
Sunrun36,668
Tesla Energy23,018
Trinity Solar12,458
Direct Energy Solar Formerly Astrum3,361
Roof Diagnostics Solar3,086
Boston Solar2,932
Sungevity Development2,795
Next Step Living2,360
Sunbug Solar2,356
Rgs Energy2,042

Most Popular Panel Brands in Massachusetts

BrandInstallations
Trina Solar26,879
Jinko Solar Co., Ltd17,500
LG Electronics Inc.17,064
Qcells North America13,345
SunPower8,653
REC Solar8,513
CSI Solar Co., Ltd.7,554
Hanwha Qcells (Qidong) Co. Ltd.6,904
Yingli Energy (China)3,740
SolarWorld3,551

Solar by County - Massachusetts

CountyInstallationsCapacity
Middlesex30,085572.8 MW
Worcester19,056947.8 MW
Essex14,374225.6 MW
Bristol13,185410 MW
Norfolk11,818272.6 MW
Barnstable11,097186.2 MW
Plymouth11,012401.1 MW
Hampden7,896310.5 MW
Hampshire6,231172.1 MW
Suffolk6,12982.1 MW
Berkshire3,931186.9 MW
Franklin3,153110.6 MW
Dukes1,27621.8 MW
Nantucket2395.1 MW

Massachusetts Solar Incentives

Tax credits, rebates & programs

Is Solar Worth It in Massachusetts?

Data-backed analysis

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