PanelCensus

Key Solar

Recently active

Solar installer based in Massachusetts · active in 2 states · installer record #6989 resolved from 33 public installation records.

At a glance

Key Solar is a solar installer with 33 recorded installations totalling 13.9 MW, dated 2017 to 2025. Its records are concentrated in Massachusetts (112%), where it ranks 163rd of 463 profiled installers by volume and 4,241st of 10,536 nationally. The median installed price across 34 priced systems is $2.14/W before incentives.

Recorded installs
33
Total capacity
13.9 MW
DC nameplate
Median system
221.2 kW
≈ $426,116
Median price
$2.14/W
pre-incentive · 34 priced
Third-party owned
27%
lease / PPA
Battery attach
9%
First recorded
2017
Last recorded
2025

Track record

Install volume by year

2011
1
2017
3$2.56/W
2018
7$2.19/W
2019
4$2.12/W
2020
7$2.36/W
2021
5$1.87/W
2022
5$2.16/W
2023
1$1.98/W
2024
2$2.22/W
2025
2$1.97/W

Bars: recorded installs · right column: this installer's median $/W that year.

Latest records

Most recent recorded installs

DateLocationSizePriceOwnership
Sep 4, 2025Dighton, MA3,551.2 kW$3,846,941Host-owned · battery
Mar 20, 2025Boston, MA426.4 kW$1,217,083Host-owned
Oct 10, 2024Haverhill, MA442.3 kW$908,879—
Oct 10, 2024Haverhill, MA381.4 kW$908,879Host-owned
Sep 13, 2023Hopkinton, MA25.3 kW$50,000Host-owned
Sep 6, 2022Norfolk, MA227.5 kW$780,795Third-party
Aug 29, 2022Framingham, MA31.4 kW$36,048Host-owned
Jul 1, 2022Millville, MA87.4 kW$201,257Host-owned
May 13, 2022Sudbury, MA214.8 kW$360,264Host-owned
Jan 24, 2022Grafton, MA304.9 kW$658,025Host-owned

See all 33 installations →searchable & filterable; export to CSV with a free account

Service geography

Massachusetts
37
Rhode Island
1

Busiest cities

Framingham, MA 6Hopkinton, MA 3Braintree, MA 2Grafton, MA 2Dennis, MA 2Brewster, MA 2Medway, MA 2East Bridgewater, MA 2

Record

Installer ID
PC-6989
First recorded install
Jun 19, 2017
Last recorded install
Sep 4, 2025
Priced records
34

Is this your company?

Installers will be able to claim this profile, correct records and add licensing, NABCEP credentials and service details. Create a free account to be ready when claims open.

How does Key Solar compare with other installers in Massachusetts?

By recorded installations Key Solar ranks 163rd among the 463 installers based in Massachusetts with five or more records. Its median price of $2.14/W is about half of the Massachusetts median of $4.17/W (the installer's median covers every state it works in). Its median system, 221.2 kW, is about 30 times the state median of 7.5 kW. 27% of its recorded installations are third-party owned (lease or power-purchase agreement), against 47% across Massachusetts. 9% include battery storage, compared with 4% of Massachusetts records. Installers of similar recorded volume in Massachusetts include Moss Hollow Solar (35), Kosmo Solar (34) and Samuel Pillsbury (34).

How has Key Solar's installation volume changed?

Key Solar's earliest dated installation on record is from 2011. It has recorded installations in 10 calendar years. The busiest year was 2018, with 7 installations. 2025, its latest year with records, has 2. Its median price per watt moved from $2.56/W in 2017 to $1.97/W in 2025. The most recent recorded installation is dated Sep 4, 2025.

Where does Key Solar install solar?

Recorded installations span 2 states: Massachusetts (37, 112%) and Rhode Island (1, 3%). The cities with the most of its installations are Framingham, MA (6), Hopkinton, MA (3), Braintree, MA (2), Grafton, MA (2) and Dennis, MA (2).

Frequently asked questions

How many solar installations has Key Solar completed?

PanelCensus records 33 installations by Key Solar, from Jun 19, 2017 to Sep 4, 2025, totalling 13.9 MW of capacity. Public reporting varies by state, so the company's true total may be higher.

What does Key Solar charge for solar?

The median installed price across 34 priced systems is $2.14/W before incentives (median system 221.2 kW, about $426,116). The Massachusetts median is $4.17/W.

Where does Key Solar install solar?

Recorded installs span 2 states, led by Massachusetts (37) and Rhode Island (1). Its busiest city is Framingham, MA.

Is Key Solar still installing solar?

The most recent installation attributed to Key Solar in the public records is dated Sep 4, 2025; 2025 has 2 recorded installations. Records reach PanelCensus months to a couple of years after installation, so recent activity may not appear yet.

Does Key Solar install leased or PPA solar systems?

9 recorded installations by Key Solar (27%) are third-party owned — a lease or power-purchase agreement; across Massachusetts the share is 47%.

Does Key Solar install battery storage?

3 recorded installations by Key Solar (9%) include a battery.

Related installers and places

Dataset updated . Sources: LBNL Tracking the Sun + permit and program records; installer resolved by exact-normalized name matching.

About this data

Source: Lawrence Berkeley National Laboratory's Tracking the Sun, merged with city permit records, state incentive programs and the USGS U.S. Large-Scale Solar Photovoltaic Database / EIA-860 plant registers, as published September 21, 2026 — PanelCensus refreshes it as each source publishes new records. See the methodology for how records are matched, cleaned and scored.

Cite as: PanelCensus, “Key Solar, solar installer (Massachusetts)”, https://panelcensus.com/installers/massachusetts/key-solar-6989 (data as of September 21, 2026).