Diablo Solar Services
Recently activeSolar installer based in California · installer record #3568 resolved from 2,140 public installation records.
Data through: California through Aug 2026 (monthly state program data).
At a glance
Diablo Solar Services is a solar installer with 2,140 recorded installations totalling 15.5 MW, dated 2002 to 2026. All of its records are in California, where it ranks 138th of 6,163 profiled installers by volume and 226th of 10,840 nationally. Its median installed price for solar-only systems in 2023–2025 is $4.08/W before incentives, across 156 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 | Diablo Solar Services | California median | vs state |
|---|---|---|---|---|
| 2024 | 12 | $4.33/W | $3.80/W | +14% |
| 2023 | 140 | $4.05/W | $4.06/W | −0% |
| 2022 | 126 | $3.86/W | $4.11/W | −6% |
| 2021 | 110 | $3.78/W | $3.98/W | −5% |
| 2020 | 148 | $4.19/W | $3.97/W | +6% |
| 2019 | 193 | $4.14/W | $3.95/W | +5% |
| 2018 | 133 | $4.05/W | $4.01/W | +1% |
| 2017 | 98 | $4.13/W | $4.05/W | +2% |
| 2016 | 108 | $4.31/W | $4.37/W | −1% |
| 2015 | 65 | $4.40/W | $4.58/W | −4% |
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.
Equipment
Module, inverter and battery brands
| Equipment | Year | Main brands (share of systems that reported one) | Year before |
|---|---|---|---|
| Modules | 2026*28 reported | Hyundai 57% · Panasonic 11% · SEG Solar 7% · Silfab 7%Main brand changed from Silfab (2025) | Silfab 63%2025, 75 reported |
| Inverters | 2026*28 reported | Tesla 64% · Enphase 18% · SolarEdge 7% · SunPower 7% | Tesla 70%2025, 73 reported |
| Batteries | 2026*17 reported | Tesla 94% · Enphase 6% | Tesla 95%2025, 59 reported |
Manufacturer on each recorded installation, as filed with the state program (Tracking the Sun for earlier years). Brand names are grouped by manufacturer family (e.g. Hanwha Q CELLS and Qcells North America count as Qcells). Not every state reports equipment, and battery brands come mainly from California and New Jersey. *2026 to date, from California records only.
Latest records
Most recent recorded installs
| Date | Location | Size | Price | Ownership |
|---|---|---|---|---|
| Aug 20, 2026 | Pinole, CA | 3.3 kW | — | Host-owned · battery |
| Jul 29, 2026 | Alamo, CA | — | — | Host-owned · battery |
| Jul 22, 2026 | Walnut Creek, CA | 6.3 kW | — | Host-owned · battery |
| Jul 20, 2026 | Castro Valley, CA | 10.3 kW | — | Host-owned · battery |
| Jul 2, 2026 | Danville, CA | 15 kW | — | Host-owned · battery |
| Jun 26, 2026 | Walnut Creek, CA | 3.2 kW | — | Host-owned |
| Jun 19, 2026 | Healdsburg, CA | 10.5 kW | — | Host-owned · battery |
| Jun 16, 2026 | Danville, CA | 6.7 kW | — | Host-owned |
| May 11, 2026 | Berkeley, CA | 1.7 kW | — | Host-owned |
| May 5, 2026 | Danville, CA | 7.9 kW | — | Host-owned · battery |
See all 2,140 installations →searchable & filterable; export to CSV with a free account
Service geography
- California
- 2,140
Busiest cities
Record
- Installer ID
- PC-3568
- First recorded install
- Oct 25, 2002
- Last recorded install
- Aug 20, 2026
- Priced records
- 1,724
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How does Diablo Solar Services compare with other installers in California?
By recorded installations Diablo Solar Services ranks 138th among the 6,163 installers based in California with five or more records. Its 2023–2025 solar-only median of $4.08/W is roughly in line with the California median of $3.95/W on the same basis. Its median system, 6.9 kW, is about 16% above the state median of 5.9 kW. 2% of its recorded installations are third-party owned (lease or power-purchase agreement), against 29% across California. 12% include battery storage, compared with 16% of California records. Installers of similar recorded volume in California include Swell Contractors (2,194), Cinnamon Solar (2,168) and South West Builders (2,149).
How has Diablo Solar Services's installation volume changed?
Diablo Solar Services's earliest dated installation on record is from 2002. It has recorded installations in 24 calendar years. The busiest year was 2019, with 194 installations. 2025, its latest year with records, has 76. Its median price per watt moved from $8.07/W in 2002 to $4.41/W in 2025. The most recent recorded installation is dated Aug 20, 2026.
Where does Diablo Solar Services install solar?
All recorded installations are in California. The cities with the most of its installations are Walnut Creek, CA (177), Danville, CA (112), Lafayette, CA (105), Martinez, CA (99) and Concord, CA (91).
Frequently asked questions
How many solar installations has Diablo Solar Services completed?
PanelCensus records 2,140 installations by Diablo Solar Services, from Oct 25, 2002 to Aug 20, 2026, totalling 15.5 MW of capacity. Public reporting varies by state, so the company's true total may be higher.
What does Diablo Solar Services charge for solar?
For solar-only systems installed in 2023–2025, the median reported price is $4.08/W before incentives, across 156 priced systems. The California median on the same basis is $3.95/W. Across all 1,724 priced systems since 2002, including battery systems, the median is $4.36/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 Diablo Solar Services install solar?
All 2,140 recorded installations are in California, the most of them in Walnut Creek.
Is Diablo Solar Services still installing solar?
The most recent installation attributed to Diablo Solar Services in the public records is dated Aug 20, 2026; 2025 has 76 recorded installations. Records here run California through Aug 2026 (monthly state program data), so the newest installations may not appear yet.
Does Diablo Solar Services install leased or PPA solar systems?
39 recorded installations by Diablo Solar Services (2%) are third-party owned — a lease or power-purchase agreement; across California the share is 29%.
Does Diablo Solar Services install battery storage?
254 recorded installations by Diablo Solar Services (12%) include a battery.
Related installers and places
- All solar installers in California· 6,163 profiles
- Solar installations in California· 2,408,542 records
- Swell Contractors· 2,194 installations
- Cinnamon Solar· 2,168 installations
- South West Builders· 2,149 installations
- Sunlight Solar· 2,137 installations
- Axia Solar· 2,124 installations
- Aloha Solar· 2,114 installations
Dataset updated . Sources: LBNL Tracking the Sun (through 2025), monthly state program records (California DGStats, NYSERDA, NJ Clean Energy, Illinois Shines) and permit records; installer resolved by exact-normalized name matching and, for state program records, by the systems both sources share.
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, “Diablo Solar Services, solar installer (California)”, https://panelcensus.com/installers/california/diablo-solar-services-3568 (data as of September 21, 2026).