Option One Solar
Option One Solar appears in public records for 1,518 home solar installations from 2018 to 2026 in California. It mostly installs systems homeowners own.
- Installations on record
- 1,518467 in the last 3 years
- Years active in records
- 92018–2026
- Price vs. state average
- −18%median $3.63/W (453 owned systems)
- Leased or PPA systems
- 1%of recent installs
- With a battery
- 87%recent installs
- Typical system
- 10.4 kWmedian size
Equipment they use most
Panels
Inverters
Microinverters on 18% and optimizers on 4% of recent systems. Equipment guide
Where they install
| State | Installations | License lookup |
|---|---|---|
| California | 1,518 | Check license |
California contractor license numbers in state records: 985340.0, 985430.0. Verify with the CSLB.
What the numbers suggest
- Prices on owned systems run well below the average in the same state and year.
- It mostly installs systems homeowners own.
- A long track record (9 years in records) is a good sign for honoring a workmanship warranty.
- Batteries are a large share of its installs. Check whether a battery actually pays off for you before agreeing to one.
Before you sign with any installer
- Verify the contractor license and look for complaints with your state board and attorney general.
- Get at least three quotes and compare them in our quote comparison tool.
- Ask who does the installation (their own crews or subcontractors) and who backs the workmanship warranty.
- Read our solar sales red flags.
Other active installers in California
- Sunrun 393,217 installs
- Tesla Energy 342,090 installs
- SunPower 145,397 installs
- Freedom Forever 65,288 installs
- Bright OPS 15,565 installs
- Citadel Roofing And Solar 19,239 installs
- GAF Energy 9,795 installs
- Sunnova 19,138 installs
Data: California DGStats (through Aug 2026). Installer names are normalized from public records and may combine related business names. We don't accept payment from installers. Something wrong? Request a correction.