Del Sol Energy
Recently activeSolar installer based in California · installer record #3458 resolved from 1,054 public installation records.
At a glance
Del Sol Energy is a solar installer with 1,054 recorded installations totalling 10.6 MW, dated 2009 to 2025. All of its records are in California, where it ranks 245th of 6,010 profiled installers by volume and 403rd of 10,537 nationally. Its median installed price for solar-only systems in 2023–2025 is $3.55/W before incentives, across 160 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 | Del Sol Energy | California median | vs state |
|---|---|---|---|---|
| 2025 | 6 | $3.38/W | $3.29/W | +3% |
| 2024 | 26 | $3.52/W | $3.80/W | −7% |
| 2023 | 128 | $3.56/W | $4.06/W | −12% |
| 2022 | 119 | $3.45/W | $4.11/W | −16% |
| 2021 | 123 | $3.23/W | $3.98/W | −19% |
| 2020 | 108 | $3.32/W | $3.97/W | −16% |
| 2019 | 128 | $3.35/W | $3.95/W | −15% |
| 2018 | 92 | $3.65/W | $4.01/W | −9% |
| 2017 | 83 | $3.66/W | $4.05/W | −10% |
| 2016 | 57 | $3.80/W | $4.37/W | −13% |
| 2015 | 13 | $3.85/W | $4.58/W | −16% |
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 29, 2025 | Tiburon, CA | 8.8 kW | $56,124 | Host-owned · battery |
| Dec 23, 2025 | Brentwood, CA | 6.2 kW | $29,930 | Host-owned · battery |
| Dec 22, 2025 | Antioch, CA | 0.9 kW | $19,048 | Host-owned · battery |
| Dec 17, 2025 | Antioch, CA | 5.7 kW | $27,750 | Host-owned · battery |
| Dec 17, 2025 | Livermore, CA | 7 kW | $31,500 | Host-owned · battery |
| Dec 4, 2025 | Moraga, CA | 5 kW | $0 | Host-owned · battery |
| Dec 4, 2025 | Stanford, CA | — | — | Host-owned · battery |
| Dec 2, 2025 | Fremont, CA | 9.7 kW | $51,438 | Host-owned · battery |
| Nov 26, 2025 | Martinez, CA | 10.1 kW | $46,673 | Host-owned · battery |
| Nov 13, 2025 | Oakley, CA | 6.6 kW | $32,389 | Host-owned · battery |
See all 1,054 installations →searchable & filterable; export to CSV with a free account
Service geography
- California
- 1,054
Busiest cities
Record
- Installer ID
- PC-3458
- First recorded install
- Apr 15, 2009
- Last recorded install
- Dec 29, 2025
- Priced records
- 1,007
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How does Del Sol Energy compare with other installers in California?
By recorded installations Del Sol Energy ranks 245th among the 6,010 installers based in California with five or more records. Its 2023–2025 solar-only median of $3.55/W is about 10% below the California median of $3.95/W on the same basis. Its median system, 7.6 kW, is about 29% above 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. 15% include battery storage, compared with 16% of California records. Installers of similar recorded volume in California include Sol R Us Electrical Engineering (1,068), 360 Solar Energy (1,065) and Pacific Solar (1,060).
How has Del Sol Energy's installation volume changed?
Del Sol Energy's earliest dated installation on record is from 2009. It has recorded installations in 13 calendar years. The busiest year was 2023, with 144 installations. 2025, its latest year with records, has 64. Its median price per watt moved from $7.86/W in 2009 to $5.00/W in 2025. The most recent recorded installation is dated Dec 29, 2025.
Where does Del Sol Energy install solar?
All recorded installations are in California. The cities with the most of its installations are Brentwood, CA (438), Oakley, CA (123), Antioch, CA (84), Discovery Bay, CA (60) and Byron, CA (35).
Frequently asked questions
How many solar installations has Del Sol Energy completed?
PanelCensus records 1,054 installations by Del Sol Energy, from Apr 15, 2009 to Dec 29, 2025, totalling 10.6 MW of capacity. Public reporting varies by state, so the company's true total may be higher.
What does Del Sol Energy charge for solar?
For solar-only systems installed in 2023–2025, the median reported price is $3.55/W before incentives, across 160 priced systems. The California median on the same basis is $3.95/W. Across all 1,007 priced systems since 2009, including battery systems, the median is $3.57/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 Del Sol Energy install solar?
All 1,054 recorded installations are in California, the most of them in Brentwood.
Is Del Sol Energy still installing solar?
The most recent installation attributed to Del Sol Energy in the public records is dated Dec 29, 2025; 2025 has 64 recorded installations. Records reach PanelCensus months to a couple of years after installation, so recent activity may not appear yet.
Does Del Sol Energy install leased or PPA solar systems?
0 recorded installations by Del Sol Energy (0%) are third-party owned — a lease or power-purchase agreement; across California the share is 29%.
Does Del Sol Energy install battery storage?
154 recorded installations by Del Sol Energy (15%) include a battery.
Related installers and places
- All solar installers in California· 6,010 profiles
- Solar installations in California· 2,408,542 records
- Sol R Us Electrical Engineering· 1,068 installations
- 360 Solar Energy· 1,065 installations
- Pacific Solar· 1,060 installations
- Kurios Energy· 1,049 installations
- Jamar Electric San Diego· 1,046 installations
- Ecosolar Usa· 1,045 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, “Del Sol Energy, solar installer (California)”, https://panelcensus.com/installers/california/del-sol-energy-3458 (data as of September 21, 2026).