Alcor Solar has closed. Your solar pool heater still needs care.
Alcor Solar closed indefinitely as of October 1, 2026. Corda Solar is a licensed East Bay solar contractor, and we service the solar pool heating systems Alcor installed, from winterization and spring start-up to repairs and panel replacement.
Fall shut-down season runs mid-October through November
Winterizing before the first cold nights protects your collectors and plumbing from freeze damage.
What Alcor’s closure means for your system
Most solar pool heating systems run for decades. The company that installed yours closing doesn’t change that, but a few things do need a new home.
Your system keeps working
The collectors, valves, sensor and controller don’t depend on Alcor. They just need the same seasonal care and occasional repairs.
Seasonal service needs a new provider
If Alcor handled your fall winterization and spring start-up, those visits won’t happen this year unless you schedule them with someone else.
Panel warranties may still apply
Collector warranties usually come from the manufacturer. Alcor is no longer available to provide service. Bring us your paperwork and we’ll help you sort out what’s still covered.
Older panels are reaching end of life
Alcor installed systems across the East Bay since 1981. If yours has leaks, cracked headers or brittle panels, we’ll quote a replacement.
Solar pool heating service for former Alcor customers
We work on Aquatherm, Sealed Air and other common solar pool collectors, on tile, composition and flat roofs.
Fall shut-down and winterization
Drain the collectors, set the valves, secure the system and inspect for problems before winter.
Spring start-up
Refill, check for leaks, test the sensor and controller, and get your pool warming for the season.
Solar pool heater repair
Leaks, sensors, valve actuators, vacuum relief valves, controllers and diverter valves.
Collector replacement
Replace aging or damaged solar pool panels, including systems 15 to 40 years old.
Remove and reinstall for re-roofing
We take the panels down before your roofer starts and put them back when the roof is done.
Solar for your home
Corda Solar also designs and installs rooftop solar and batteries, which can offset the power your pool pump uses.
Annual start-up and shut-down service for former Alcor customers
- Fall winterization visit
- Spring start-up visit
- Visual inspection each visit, with a written list of anything that needs attention
- Priority scheduling in your neighborhood’s service route
Pricing assumes normal roof access. Steep, tall or fragile-tile roofs may need a quote.
Where we service solar pool heaters
Throughout Contra Costa and Alameda counties.
- Danville
- San Ramon
- Alamo
- Walnut Creek
- Lafayette
- Orinda
- Moraga
- Concord
- Clayton
- Pleasant Hill
- Martinez
- Pleasanton
- Dublin
- Livermore
- Antioch
- Brentwood
- Oakley
- Blackhawk
Questions from Alcor customers
Is Alcor Solar still in business?
Alcor Solar announced it would close indefinitely beginning October 1, 2026. Corda Solar is a separate company that services solar pool heating systems Alcor installed.
Who can service my Alcor solar pool heater?
Corda Solar is a licensed C-46 solar contractor serving Contra Costa and Alameda counties. We handle winterization, spring start-up, repairs and panel replacement on Alcor-installed systems.
Do I need to winterize my solar pool heater?
Yes. Draining and closing the system for winter protects the collectors and plumbing from freeze damage and keeps it ready for spring. Most shut-downs happen from mid-October through November.
Is my panel warranty still valid now that Alcor closed?
Panel warranties generally come from the manufacturer, not the installer, so yours may still apply. Alcor is no longer available to provide service. Send us your paperwork and we’ll help you contact the manufacturer.
Do you work on Aquatherm and Sealed Air collectors?
Yes. We service and replace collectors from Aquatherm, Sealed Air and other common solar pool heating brands.
My roof is being replaced. Can you remove and reinstall my pool solar panels?
Yes. We remove the collectors before your roofer starts and reinstall them afterward. If the panels are near end of life, we can replace them at the same time.
Book your solar pool heater service
Tell us about your system and we’ll call you to schedule. Fall shut-down spots fill by neighborhood, so earlier requests get earlier dates.
Thanks, we’ve got your request.
We’ll call you within one business day to schedule. Need us sooner? Call or text (925) 725-6622.