Great Sky Solar
Recently activeSolar installer based in Massachusetts · installer record #5379 resolved from 900 public installation records.
At a glance
Great Sky Solar is a solar installer with 900 recorded installations totalling 8.8 MW, dated 2014 to 2026. All of its records are in Massachusetts, where it ranks 17th of 487 profiled installers by volume and 461st of 10,537 nationally. Its median installed price for solar-only systems in 2023–2025 is $3.35/W before incentives, across 119 priced systems.
Track record
Install volume by year
Recorded installs per year; prices by year are in the table below.
Pricing
Price by year (solar only)
| Year | Priced systems | Great Sky Solar | Massachusetts median | vs state |
|---|---|---|---|---|
| 2023 | 118 | $3.37/W | $3.84/W | −12% |
| 2022 | 173 | $3.12/W | $3.73/W | −16% |
| 2021 | 148 | $2.93/W | $3.46/W | −15% |
| 2020 | 106 | $2.93/W | $3.46/W | −15% |
| 2019 | 75 | $2.98/W | $3.46/W | −14% |
| 2018 | 93 | $3.11/W | $3.88/W | −20% |
| 2017 | 38 | $3.47/W | $3.99/W | −13% |
| 2016 | 50 | $4.01/W | $4.50/W | −11% |
| 2015 | 14 | $4.93/W | $4.86/W | +1% |
Median installed price per DC watt before incentives, systems without a battery, by the year in the public record. Years with fewer than five priced systems are left out.
Why a company's own figure can differ from this one
- Timing. These prices come from state incentive filings, published about once a year, so the latest full year here is 2025. Prices moved down in many states after 2023; a company's current quotes can be lower (or higher) than its last full year on record.
- Dates. A filing is dated when the program processed it, not when the job was sold, so jobs can land in a different month or year than in the company's own books.
- What the price includes. The filed price is the whole project as reported to the program, which can include loan dealer fees, electrical panel upgrades or roof work. A company's internal figure often leaves those out.
- Batteries. Systems flagged with a battery are excluded here; a battery the filing didn't flag can still raise a year's median.
Latest records
Most recent recorded installs
| Date | Location | Size | Price | Ownership |
|---|---|---|---|---|
| Jan 29, 2026 | Cambridge, MA | 10.1 kW | $35,953 | — |
| Jan 13, 2026 | Cambridge, MA | 8.8 kW | $34,805 | — |
| Dec 29, 2025 | Cambridge, MA | 7 kW | $28,835 | — |
| Nov 14, 2025 | Cambridge, MA | 3.8 kW | $21,312 | — |
| Sep 15, 2025 | Cambridge, MA | 6 kW | $25,806 | — |
| Sep 9, 2025 | Cambridge, MA | 13.8 kW | $66,513 | — · battery |
| Aug 20, 2025 | Cambridge, MA | 4.2 kW | $21,879 | — |
| Aug 14, 2025 | Cambridge, MA | 16.7 kW | $55,845 | — |
| Aug 13, 2025 | Cambridge, MA | 11.9 kW | $43,162 | — |
| Jul 11, 2025 | Cambridge, MA | 10.4 kW | $9,000 | — |
See all 900 installations →searchable & filterable; export to CSV with a free account
Service geography
Busiest cities
Record
- Installer ID
- PC-5379
- First recorded install
- Apr 10, 2014
- Last recorded install
- Jan 29, 2026
- Priced records
- 833
Is this your company?
Owners can claim this profile free with a work email to keep the website and description current and post the company's own price figures beside ours.
If a record here isn't yours, a state is wrong, or a figure looks off, report a correction. We read every one and fix the record, usually within a few days.
How does Great Sky Solar compare with other installers in Massachusetts?
By recorded installations Great Sky Solar ranks 17th among the 487 installers based in Massachusetts with five or more records. Its 2023–2025 solar-only median of $3.35/W is about 11% below the Massachusetts median of $3.77/W on the same basis. Its median system, 9.3 kW, is about 24% above the state median of 7.5 kW. under 1% of its recorded installations are third-party owned (lease or power-purchase agreement), against 47% across Massachusetts. 2% include battery storage, compared with 4% of Massachusetts records. Installers of similar recorded volume in Massachusetts include Endless Mtn Solar Services (1,004), Isaksen Solar (1,002) and E2 Solar (949).
How has Great Sky Solar's installation volume changed?
Great Sky Solar's earliest dated installation on record is from 2014. It has recorded installations in 12 calendar years. The busiest year was 2022, with 182 installations. 2025, its latest year with records, has 12. Its median price per watt moved from $3.80/W in 2014 to $3.56/W in 2024. The most recent recorded installation is dated Jan 29, 2026.
Where does Great Sky Solar install solar?
All recorded installations are in Massachusetts. The cities with the most of its installations are Cambridge, MA (137), Arlington, MA (91), Boston, MA (73), Newton, MA (47) and Hopkinton, MA (27).
Frequently asked questions
How many solar installations has Great Sky Solar completed?
PanelCensus records 900 installations by Great Sky Solar, from Apr 10, 2014 to Jan 29, 2026, totalling 8.8 MW of capacity. Public reporting varies by state, so the company's true total may be higher.
What does Great Sky Solar charge for solar?
For solar-only systems installed in 2023–2025, the median reported price is $3.35/W before incentives, across 119 priced systems. The Massachusetts median on the same basis is $3.77/W. Across all 833 priced systems since 2014, including battery systems, the median is $3.10/W. Prices are the total project cost reported to state incentive programs, divided by the system's DC watts, so they can include electrical upgrades or other work billed with the solar.
Where does Great Sky Solar install solar?
All 900 recorded installations are in Massachusetts, the most of them in Cambridge.
Is Great Sky Solar still installing solar?
The most recent installation attributed to Great Sky Solar in the public records is dated Jan 29, 2026; 2025 has 12 recorded installations. Records reach PanelCensus months to a couple of years after installation, so recent activity may not appear yet.
Does Great Sky Solar install leased or PPA solar systems?
1 recorded installation by Great Sky Solar (under 1%) is third-party owned — a lease or power-purchase agreement; across Massachusetts the share is 47%.
Does Great Sky Solar install battery storage?
15 recorded installations by Great Sky Solar (2%) include a battery.
Related installers and places
- All solar installers in Massachusetts· 487 profiles
- Solar installations in Massachusetts· 159,600 records
- Endless Mtn Solar Services· 1,004 installations
- Isaksen Solar· 1,002 installations
- E2 Solar· 949 installations
- Second Generation Energy· 835 installations
- Ameresco· 790 installations
- Solar Rising· 784 installations
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, “Great Sky Solar, solar installer (Massachusetts)”, https://panelcensus.com/installers/massachusetts/great-sky-solar-5379 (data as of September 21, 2026).