Quattro Solar
Recently activeSolar installer based in California · installer record #9791 resolved from 214 public installation records.
At a glance
Quattro Solar is a solar installer with 214 recorded installations totalling 3.2 MW, dated 2011 to 2025. All of its records are in California, where it ranks 859th of 6,010 profiled installers by volume and 1,390th of 10,537 nationally. Its median installed price for solar-only systems in 2023–2025 is $4.59/W before incentives, across 13 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 | Quattro Solar | California median | vs state |
|---|---|---|---|---|
| 2024 | 5 | $4.48/W | $3.80/W | +18% |
| 2020 | 6 | $3.68/W | $3.97/W | −7% |
| 2019 | 22 | $3.68/W | $3.95/W | −7% |
| 2018 | 32 | $3.53/W | $4.01/W | −12% |
| 2017 | 20 | $4.13/W | $4.05/W | +2% |
| 2016 | 9 | $4.82/W | $4.37/W | +10% |
| 2015 | 5 | $4.79/W | $4.58/W | +5% |
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 |
|---|---|---|---|---|
| Dec 4, 2025 | Mill Valley, CA | 8.5 kW | $65,000 | Host-owned · battery |
| Nov 5, 2025 | Novato, CA | 2.8 kW | $8,500 | — |
| Oct 31, 2025 | Corte Madera, CA | 4.7 kW | $21,645 | Host-owned |
| Oct 6, 2025 | Napa, CA | 4.3 kW | $21,000 | Host-owned |
| Aug 20, 2025 | Walnut Creek, CA | 11.7 kW | $83,400 | Host-owned · battery |
| May 14, 2025 | Fairfax, CA | 599.5 kW | $1,456,511 | — |
| May 14, 2025 | Fairfax, CA | 94.3 kW | $605,000 | Host-owned |
| Jul 19, 2024 | Mill Valley, CA | 9.7 kW | $81,821 | Host-owned · battery |
| Jun 26, 2024 | Novato, CA | — | $93,300 | Host-owned · battery |
| Jun 26, 2024 | Dillon Beach, CA | 2 kW | $5,500 | Host-owned |
See all 214 installations →searchable & filterable; export to CSV with a free account
Service geography
- California
- 214
Busiest cities
Record
- Installer ID
- PC-9791
- First recorded install
- Aug 31, 2011
- Last recorded install
- Dec 4, 2025
- Priced records
- 152
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How does Quattro Solar compare with other installers in California?
By recorded installations Quattro Solar ranks 859th among the 6,010 installers based in California with five or more records. Its 2023–2025 solar-only median of $4.59/W is about 16% above the California median of $3.95/W on the same basis. Its median system, 5.4 kW, is roughly in line with the state median of 5.9 kW. 0% of its recorded installations are third-party owned (lease or power-purchase agreement), against 29% across California. 23% include battery storage, compared with 16% of California records. Installers of similar recorded volume in California include Solcon Solar (215), SEMPER SOLARIS CONSTRUCTION INC (215) and Killua Energy (214).
How has Quattro Solar's installation volume changed?
Quattro Solar's earliest dated installation on record is from 2011. It has recorded installations in 15 calendar years. The busiest year was 2018, with 40 installations. 2025, its latest year with records, has 7. Its median price per watt moved from $6.68/W in 2011 to $5.64/W in 2025. The most recent recorded installation is dated Dec 4, 2025.
Where does Quattro Solar install solar?
All recorded installations are in California. The cities with the most of its installations are San Rafael, CA (21), Petaluma, CA (18), Novato, CA (18), Mill Valley, CA (14) and Fairfax, CA (11).
Frequently asked questions
How many solar installations has Quattro Solar completed?
PanelCensus records 214 installations by Quattro Solar, from Aug 31, 2011 to Dec 4, 2025, totalling 3.2 MW of capacity. Public reporting varies by state, so the company's true total may be higher.
What does Quattro Solar charge for solar?
For solar-only systems installed in 2023–2025, the median reported price is $4.59/W before incentives, across 13 priced systems. The California median on the same basis is $3.95/W. Across all 152 priced systems since 2011, including battery systems, the median is $4.34/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 Quattro Solar install solar?
All 214 recorded installations are in California, the most of them in San Rafael.
Is Quattro Solar still installing solar?
The most recent installation attributed to Quattro Solar in the public records is dated Dec 4, 2025; 2025 has 7 recorded installations. Records reach PanelCensus months to a couple of years after installation, so recent activity may not appear yet.
Does Quattro Solar install leased or PPA solar systems?
0 recorded installations by Quattro Solar (0%) are third-party owned — a lease or power-purchase agreement; across California the share is 29%.
Does Quattro Solar install battery storage?
50 recorded installations by Quattro Solar (23%) include a battery.
Related installers and places
- All solar installers in California· 6,010 profiles
- Solar installations in California· 2,408,542 records
- Solcon Solar· 215 installations
- SEMPER SOLARIS CONSTRUCTION INC· 215 installations
- Killua Energy· 214 installations
- Sunpower By The Solar Quote· 214 installations
- Cal Contractor Services· 213 installations
- High Point Solar· 213 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, “Quattro Solar, solar installer (California)”, https://panelcensus.com/installers/california/quattro-solar-9791 (data as of September 21, 2026).