R D Winkle Company
R D Winkle Company appears in public records for 65 home solar installations from 2014 to 2025 in California. It mostly installs systems homeowners own.
- Installations on record
- 658 in the last 3 years
- Years active in records
- 122014–2025
- Price vs. state average
- +2%median $4.68/W (8 owned systems)
- Leased or PPA systems
- 0%of recent installs
- With a battery
- 5%recent installs
- Typical system
- 11.8 kWmedian size
Equipment they use most
Panels
Inverters
Microinverters on 62% and optimizers on 29% of recent systems. Equipment guide
Where they install
| State | Installations | License lookup |
|---|---|---|
| California | 65 | Check license |
California contractor license number in state records: 688062.0. Verify with the CSLB.
What the numbers suggest
- Prices on owned systems run close to the average in the same state and year.
- It mostly installs systems homeowners own.
- A long track record (12 years in records) is a good sign for honoring a workmanship warranty.
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.