Roi Solar Power
Recently activeSolar installer based in California · installer record #10348 resolved from 74 public installation records.
Data through: California through Aug 2026 (monthly state program data).
At a glance
Roi Solar Power is a solar installer with 74 recorded installations totalling 520 kW, dated 2021 to 2026. All of its records are in California, where it ranks 1691st of 6,163 profiled installers by volume and 2,799th of 10,840 nationally. The median installed price across 34 priced systems from all years is $5.50/W before incentives.
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 | Roi Solar Power | California median | vs state |
|---|---|---|---|---|
| 2023 | 7 | $2.80/W | $4.06/W | −31% |
| 2022 | 8 | $3.07/W | $4.11/W | −25% |
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*33 reported | Hyundai 21% · JA Solar 21% · Qcells 21% · REC 9% | Qcells 24%2025, 17 reported |
| Inverters | 2026*33 reported | Tesla 36% · Enphase 27% · Sigenergy Technology 15% · PointGuard Energy 12% | Tesla 80%2025, 20 reported |
| Batteries | 2026*13 reported | Tesla 92% · Enphase 8% | Tesla 78%2025, 18 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 26, 2026 | Jackson, CA | 4.5 kW | — | Host-owned · battery |
| Aug 24, 2026 | Atwater, CA | 15.5 kW | — | Host-owned · battery |
| Jul 16, 2026 | Fremont, CA | 4.1 kW | — | Host-owned · battery |
| Jul 15, 2026 | Rio Vista, CA | 4.9 kW | — | Host-owned · battery |
| Jun 17, 2026 | Livermore, CA | 9.7 kW | — | Third-party |
| Jun 4, 2026 | Tracy, CA | 10.8 kW | — | Host-owned · battery |
| Apr 16, 2026 | Petaluma, CA | 3.7 kW | — | Host-owned |
| Apr 16, 2026 | Winters, CA | 9.6 kW | — | Host-owned · battery |
| Mar 25, 2026 | West Sacramento, CA | 8.8 kW | — | Host-owned |
| Mar 15, 2026 | Albany, CA | 5.4 kW | — | Host-owned |
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Service geography
Busiest cities
Record
- Installer ID
- PC-10348
- First recorded install
- Dec 14, 2021
- Last recorded install
- Aug 26, 2026
- Priced records
- 34
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How does Roi Solar Power compare with other installers in California?
By recorded installations Roi Solar Power ranks 1691st among the 6,163 installers based in California with five or more records. Its all-years median price of $5.50/W is about 29% above the California median of $4.26/W. Its median system, 7.5 kW, is about 27% above the state median of 5.9 kW. 9% of its recorded installations are third-party owned (lease or power-purchase agreement), against 29% across California. 54% include battery storage, compared with 16% of California records. Installers of similar recorded volume in California include New Energy Construction (74), Oc Solar Panels (74) and R T Maher Construction (74).
How has Roi Solar Power's installation volume changed?
Roi Solar Power's earliest dated installation on record is from 2021. It has recorded installations in 5 calendar years. The busiest year was 2025, with 23 installations. Its median price per watt moved from $2.57/W in 2021 to $6.36/W in 2025. The most recent recorded installation is dated Aug 26, 2026.
Where does Roi Solar Power install solar?
All recorded installations are in California. The cities with the most of its installations are Fremont, CA (5), San Jose, CA (5), Lafayette, CA (3), Livermore, CA (3) and Oakland, CA (3).
Frequently asked questions
How many solar installations has Roi Solar Power completed?
PanelCensus records 74 installations by Roi Solar Power, from Dec 14, 2021 to Aug 26, 2026, totalling 520 kW of capacity. Public reporting varies by state, so the company's true total may be higher.
What does Roi Solar Power charge for solar?
The median installed price across 34 priced systems from all years is $5.50/W before incentives (median system 7.5 kW, about $33,410). The California median is $4.26/W. Prices are the total project cost reported to state programs, so they can include work billed with the solar.
Where does Roi Solar Power install solar?
All 74 recorded installations are in California, the most of them in Fremont.
Is Roi Solar Power still installing solar?
The most recent installation attributed to Roi Solar Power in the public records is dated Aug 26, 2026; 2025 has 23 recorded installations. Records here run California through Aug 2026 (monthly state program data), so the newest installations may not appear yet.
Does Roi Solar Power install leased or PPA solar systems?
7 recorded installations by Roi Solar Power (9%) are third-party owned — a lease or power-purchase agreement; across California the share is 29%.
Does Roi Solar Power install battery storage?
40 recorded installations by Roi Solar Power (54%) include a battery.
Related installers and places
- All solar installers in California· 6,163 profiles
- Solar installations in California· 2,408,542 records
- New Energy Construction· 74 installations
- Oc Solar Panels· 74 installations
- R T Maher Construction· 74 installations
- Rps Solar· 74 installations
- COACHES HVAC EXTRAORDINAIR· 74 installations
- Jess Knolle Electric· 74 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, “Roi Solar Power, solar installer (California)”, https://panelcensus.com/installers/california/roi-solar-power-10348 (data as of September 21, 2026).