California
76 cities ranked#1statewide: Sunrun
See which panels and inverters homeowners actually install, understand what changed with federal incentives in 2026, and find the installers that put in the most systems in your city.
Pick your state to see the top solar companies in each city we rank, from public installation records.
#1statewide: Sunrun
#1statewide: Sunrun
#1statewide: Sunrun
#1statewide: Sunrun
#1statewide: Sunrun
#1in Albuquerque: Solar Works Energy
#1in San Antonio: Greenstar Power
#1statewide: Everlight Solar Construction
#1statewide: Trinity Solar
We rank installers in the 17 states where public records or city permits name the company that installed each home system. Figures cover each state's latest three years of records; the share of homes with solar is from the U.S. Energy Information Administration. For every other state, see how many homes have solar in each state.
From public installation records of home systems installed in 2021–2023 (Tracking the Sun, Lawrence Berkeley National Laboratory).
| Panel brand | Share of home systems | Note |
|---|---|---|
| Qcells | 25% | The most common brand on US homes. |
| SunPower | 12% | SunPower filed for bankruptcy in 2024; panel warranties depend on the manufacturer (Maxeon). |
| LONGi | 10% | One of the world's largest panel makers. |
| REC | 7% | |
| LG | 5% | LG stopped making solar panels in 2022; existing warranties are still honored by LG. |
| JA Solar | 5% | |
| Silfab | 4% | Manufactures in North America. |
| Canadian Solar | 4% |
Panels keep getting better: the median panel installed on homes converted 16.4% of sunlight into electricity in 2015 and 20.8% in 2023. A higher-efficiency panel fits more power on the same roof; it doesn't make each kilowatt cheaper.
Converts DC to AC directly beneath each solar module on the roof.
Panel-level optimizers paired with a high-efficiency central inverter.
Panels wired in series directly into a single central inverter.
The 30% credit homeowners used to claim when buying a system (Section 25D) ended on December 31, 2025.
No federal credit for systems installed on or after January 1, 2026. The Section 25D Residential Clean Energy Credit was terminated by the One Big Beautiful Bill Act. A quote that still subtracts 30% from the price is out of date.
The Section 48E credit is claimed by the business that owns the system. Homeowners can benefit from it indirectly through a solar lease or power purchase agreement, available through the end of 2027.
Not affected by the federal change. They vary by state and utility, so ask each installer which ones apply to your address.
What each type of system involves, what it costs and what to ask installers before you sign:
How a home system is installed, what it costs and what to ask installers.
Explore Guide →Removing and reinstalling panels for a new roof, and when to upgrade.
Explore Guide →Sizing panels and batteries for cabins and remote properties.
Explore Guide →How solar hot water systems work, what they cost and how they're maintained.
Explore Guide →Ballasted racks for flat roofs and what the roof has to carry.
View Guide →When a ground array beats the roof, and what it costs.
View Guide →How solar shingles compare with panels on price and output.
View Guide →How much backup one battery gives you, and what batteries cost.
View Guide →How buying from Tesla compares with a local installer, and what to ask first.
View Guide →What a home battery costs installed, from real records, and when it pays off.
Read Guide →Common questions about solar installation timelines, warranties, and contractor vetting.