How we verify data

Cali-Graf publishes only facts we can trace to a public source. Every section on every page names its source, and calculated values say how they were calculated.

Where the data comes from

Source	What we take	Coverage
Contractors State License Board (CSLB)	License status, classes, bond, workers' comp, business type	License master as of Oct 4, 2026
City of Anaheim	Building permits that name the contractor's license	Nov 1999 – Sep 2026
City of Chula Vista	Building permits that name the contractor's license	Mar 2026 – Oct 2026
City of Huntington Beach	Building permits that name the contractor's license	Jan 2024 – Oct 2026
City of Los Angeles	Building permits that name the contractor's license	Apr 2006 – Oct 2026
City of Palmdale	Building permits that name the contractor's license	Jun 2023 – Oct 2026
City of Rancho Cucamonga	Building permits that name the contractor's license	Mar 2024 – Oct 2026
San Diego County	Building permits that name the contractor's license	Oct 2024 – Oct 2026
California Energy Commission	Solar panel, inverter and battery listings with test data	Current CEC lists
Manufacturer datasheets and documents	Mechanical specs, warranties, certifications	Documents found on manufacturers' own sites
Kiwa PVEL, RETC	Independent reliability test results	Published scorecards and indexes
NLR (formerly NREL) PVWatts v8 and SAM	Typical-year production model, inverter library	6 Southern California cities
Contractors' own websites	Services and certifications the company claims — only after we confirm the site belongs to the license	Verified sites only

Our rules

Rankings come from permitsNo company pays to appear in a list or to change its place.
No homeowner dataFrom building permits we show only the type of work, the date, the jurisdiction and the ZIP code — never names or street addresses.
No data, no sectionWhen a source has nothing on a company or product, the section is not shown — we do not fill gaps with estimates.
Matched by license numberPermits are tied to a contractor by the CSLB license number on the permit, not by name.

Corrections

License and permit facts change when the source changes. If you see a mistake — a permit matched to the wrong company, a wrong spec — write to calisolargroup@gmail.com with the page address. We check it against the source and fix it.