Who repairs solar systems in California, including ones they did not install?
As of November 2026, these 6 companies say on their own websites that they repair residential solar systems another company installed: Citadel Roofing & Solar, EnergyAid (an Otovo company), Forme Solar Electric, Semper Solaris, Solar Optimum and SolarTech. EnergyAid is owned by Otovo, which publishes this list. Each entry below gives what the company publishes itself: where it works, what it does, any published prices and how to reach it. Most do not publish repair prices, so ask for a written quote before any work starts.
How this list was made
We included a company only if its own website, checked November 9, 2026, says it services systems installed by someone else and shows current service pages. Entries are in alphabetical order. We do not rank or rate the companies, and nothing here is a review. Every fact comes from the company's own site, linked in its entry. Prices and service areas change, so confirm them with the company before you book.
Otovo publishes lists for the four states where Otovo service records show the most homeowner work orders in the 12 months to November 2026. The others are Arizona, Nevada and Texas.
Solar repair companies in California (as of November 2026)
Citadel Roofing & Solar
- Website: citadelrs.com
- Systems installed by others: Its solar maintenance page says it services systems even if Citadel did not install them.
- Service area: Northern, Central and Southern California; it names Sacramento, Stockton, Modesto, Fremont and Roseville among others.
- Services: diagnostics, panel and inverter repair or replacement, electrical repairs, help with warranty claims, critter guards, performance monitoring, change-of-ownership inspections, cleaning, system expansions and batteries.
- Published prices (as of November 2026): price not published.
- How to reach them: (800) 400-2852, or citadelrs.com/contact-us.
- Source: citadelrs.com/residential/solar-maintenance/, checked November 9, 2026
EnergyAid (an Otovo company)
- Website: energyaid.net
- Systems installed by others: EnergyAid is owned by Otovo, which publishes this list. Its About page says it serves homeowners left without support when their original installer went out of business.
- Service area: California, Arizona and Nevada; California offices in Santa Ana, San Bernardino, San Diego, San Jose, Sacramento and Fresno.
- Services: inspections, including real-estate inspections; inverter service and repair; panel cleaning; critter guards; battery installation and service; solar removal and reinstallation; new installations; membership plans.
- Published prices (as of November 2026): inspection and panel cleaning prices not published on energyaid.net; membership plans are described at energyaid.net/membership.
- How to reach them: 877-787-0607, or the form on energyaid.net.
- Source: energyaid.net/locations, checked November 9, 2026
Forme Solar Electric
- Website: formesolar.com
- Systems installed by others: Its repair page says it services systems installed by other companies.
- Service area: Orange, Los Angeles, Riverside, San Bernardino and San Diego counties.
- Services: low or no production, string inverter and Enphase microinverter faults, offline monitoring, tripping breakers, wiring and junction-box faults, batteries that will not charge; also panel removal, maintenance and cleaning.
- Published prices (as of November 2026): a flat $350 repair visit; parts are quoted in writing before further work.
- How to reach them: (714) 694-2262, or formesolar.com/contact.
- Source: formesolar.com/services/solar-panel-repair-near-me/, checked November 9, 2026
Semper Solaris
- Website: sempersolaris.com
- Systems installed by others: Its solar service page says it services systems whether or not it installed them.
- Service area: California.
- Services: maintenance, diagnostics, inverter replacement, battery repair, monitoring and performance problems, panel cleaning, inspections. The company also does roofing and HVAC.
- Published prices (as of November 2026): price not published; the page offers a free estimate.
- How to reach them: (888) 210-3366, or sempersolaris.com/contact-us.
- Source: www.sempersolaris.com/solar-service/, checked November 9, 2026
Solar Optimum
- Website: solaroptimum.com
- Systems installed by others: Its maintenance page offers to repair orphaned systems (systems whose installer no longer services them).
- Service area: California; the page says some restrictions apply.
- Services: system audits, tune-ups, panel repair and replacement, panel removal, cleaning, string inverter and microinverter repair, battery diagnosis and replacement, monitoring troubleshooting.
- Published prices (as of November 2026): price not published.
- How to reach them: (818) 745-1496 for site visits; main line (800) 552-9970.
- Source: www.solaroptimum.com/maintenance/, checked November 9, 2026
SolarTech
- Website: solartechonline.com
- Systems installed by others: Its service page says it services systems SolarTech did not install.
- Service area: California and Arizona, with offices in El Cajon (San Diego), Inglewood, Anaheim, Riverside and Phoenix.
- Services: system health checks and troubleshooting, repair, panel removal and reinstallation, cleaning, monitoring, critter guards, battery additions and upgrades, care plans.
- Published prices (as of November 2026): repair prices not published. It says the remote review is free and the on-site diagnostic visit is paid, without stating the amount; its care plans give 10%, 15% or 20% off repair labor.
- How to reach them: (619) 485-5521; support (619) 716-0452.
- Source: solartechonline.com/service-and-maintenance/, checked November 9, 2026
Before you book a repair
- Note the inverter brand and any error code first. Otovo's error code guides explain what SolarEdge, Enphase, Tesla and other codes mean and what you can safely check yourself.
- Check what your warranties still cover. Equipment makers usually replace a faulty part but do not pay you for the labor; see what a maintenance plan, a manufacturer warranty and an installer warranty each cover.
- If your installer has closed, read who services solar panels when the installer is gone.
- Ask for the price of the diagnostic visit and of the repair in writing before work starts.
Is an entry out of date, or does your company belong on this list? Email [email protected] with a link to the page on your own website that shows it, and we will check it.