Solar Companies in Antioch, CA: Who Installed the Most Systems in 2025

Installers who connected the most home solar systems in Antioch in 2025

Counts from utility records, not a ranking or endorsement. Check each license's status and complaint history on the CSLB's Check a License page (checked Sept. 24, 2026).

Source: California Distributed Generation Statistics (CPUC), Interconnected Project Sites data set, data through May 31, 2026 (checked Sept. 24, 2026).

Home solar in Antioch by the numbers

PG&E approved 891 home solar systems in Antioch in 2025, from 73 installers; the top three were named on 56% of them. The busiest year since 2021 was 2022, with 1,669 (2025: -47%). Another 240 were approved from January through May 2026.

2025 mix: 56% leased or on a power purchase agreement, 44% owned by the household; 59% with a battery; median size 6.02 kW DC. Contra Costa County: 43% leased or PPA, 58% with a battery, median 6.48 kW.

Hiring a solar company in Antioch

Solar companies in Antioch get an instant permit through SolarAPP+ and the City's Citizen Access portal for eligible rooftop systems, and connect them to PG&E. Antioch is not an MCE member, unlike Pittsburg next door, so PG&E supplies the generation and its Solar Billing Plan sets your export credits. Nine in ten Antioch permits in 2024 included a battery. Compare at least three written bids built on your own PG&E bill.

Start with your Antioch electricity bill

Antioch is PG&E territory on the California Energy Commission's utility map, and no community choice provider serves the city: MCE's member list stops at Pittsburg and Oakley on either side. PG&E therefore charges for both generation and delivery, and PG&E's Solar Billing Plan values what you export. Each bidder should model that plan, including PG&E's Energy Export Bonus Credits for customers who start before 2028, from your own twelve months of usage.

Antioch's instant solar permit

The City describes its SolarAPP+ route as available only to registered contractors whose projects match the SolarAPP+ eligibility checklist, which covers the majority of residential, roof-mounted retrofit systems. The contractor submits the project to SolarAPP+ for review, pays the $25.00 processing fee, downloads the approval documents and uploads them into Citizen Access when applying. A one-time fee payment covers the solar permit, and once the documents are uploaded and the fees paid, the permit issues automatically.

Every SolarAPP+ photovoltaic inspection needs a printed SolarAPP+ inspection checklist, a single-line diagram and the permit card on site. A missing document is a common reason an inspection has to be rescheduled, so it is fair to ask who on the installer's side is responsible for having them there.

What Antioch's permit numbers show

Antioch's reports to the Energy Commission show one of the steepest climbs in the East Bay: 279 residential solar permits in 2023 and 1,306 in 2024. Battery storage went from about 47% of permits to about 90%, and the share issued online rose from about 6% to 38% as the instant route took hold.

A battery on nine in ten permits says something about how Antioch systems are being sold under the Solar Billing Plan, which values the power you import and export separately, by the hour. A battery lets a home use its own midday solar in the evening instead of exporting it. Whether it pays for itself on your bill is a separate question, and each bidder should answer it with your usage, not a neighborhood average.

What an Antioch quote needs to explain

A comparison to ask for

Because almost every 2024 Antioch permit included storage, a solar-only bid and a solar-plus-battery bid can differ by the price of a battery. Ask for both, priced separately, with the battery's usable kWh and backed-up circuits, and compare what each leaves on your PG&E bill under the Solar Billing Plan rather than a single savings figure.

Verify the company behind the Antioch quote

Match the business name and license number on each Antioch proposal to the CSLB record, then use our contractor verification steps, the quote comparison guide and the PPA, loan, lease and cash comparison.

Antioch solar quote questions