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Business ProfileSolar Companies in Berkeley, California

Semper Solaris

Taking Calls in Berkeley Today 4.60 (516 reviews)(650) 203-2589

Semper Solaris

Semper Solaris installs solar panels and battery storage in the Bay Area and offers maintenance and repairs for systems from other installers. Founded in 2012, it has a Bay Area location in Hayward.

Last Updated October 2, 2026.

Business Highlights
  • Semper Solaris is veteran-owned and operated.
  • Semper Solaris is a Tesla Certified Installer.

Service Area

Campbell, Livermore, Oakley, San Carlos, Concord, Mill Valley, Pittsburg, San Francisco, Tracy, Gilroy, Pleasanton, San Jose, Vacaville, Hayward, Oakland, Manteca, Napa and Fremont.

Local Business Taking Calls

Semper Solaris is one of 4 solar companies ProsGrade lists in Berkeley, California.

Taking Calls
Taking calls through ProsGrade
Listing details

3 services listed: Solar panel installation, Solar system service and repair and Battery storage installation. Open 7 days a week. Rated 4.6 from 516 reviews.

  • Verified listing details
  • Service information
  • Customer review signals
  • Photo gallery
  • Public contact information
  • Published local profile

How This Business Compares

How Semper Solaris compares with the other 3 solar companies on ProsGrade in Berkeley, using public Google ratings and review counts.

  • Has the most Google reviews (516) of the 4 Berkeley solar companies on ProsGrade.

Services Covered

3 services
  • Solar panel installationHigh-efficiency installations; American-made panels.
  • Solar system service and repairMaintenance, diagnostics and repairs for solar and battery systems.
  • Battery storage installationTesla Powerwall and Enphase batteries.

Reviews

What customers say

Customers praise clean work areas and professional, knowledgeable installation crews. One customer recalls Roland returning four years after installation with an update on solar regulations; another says Sebastian's team helped think through changes to a Powerwall plan for the home.

Customer Reviews

chris lou

I had my solar panels installed back in December 2021, And I’m happy that Roland recommended me to install a 5.65 KW solar system. Today, after 4years, Roland came to visit me to update me on the new regulations in the solar panel industry. How SDG&E is changing the billing regulations. I’m glad that I had installed my system back in 2021, as I’m grandfathered in to the 2.0 model. Hence I am saving quite a lot of money every year thanks to Roland. I want to emphasize that the job Semper Solaris did on the installation was very professional. As you can see from the pictures I have attached., the electrical conduit that went from the electrical panel to the roof did not loop around the rain gutters, which I found rather eye soaring on many homes in my Community. The exterior of my house looked really clean. In the case where I might purchase an EV vehicle in the future, Roland said that a Battery might not be the best solution in my case. Hence if anybody is looking to install a solar panel system or a battery, you should consult with Roland to determine the most efficient and advantageous system to be installed in your home. Thank you again, Roland for your professional advice and service.
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Victoria Willer

I decided to go solar with semper Solaris initially because of Sue Champagne who was so informative and gained our trust. She was knowledgeable and professional. I'm thrilled now that its up and running. The crew did a fantastic job and were super clean and made it a painless experience. Hard to do in construction. Extra cudos to Ruben who was fantastic
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John Norman

I recently purchased a Tesla power wall. The installation team from Semper Solaris (led by Sebastian) was great! The guys were professional, friendly, and knowledgeable! They respected my property and did an excellent job on the installation. They helped me think through some changes to the plan and what would be best for my home. I can’t recommend them highly enough!
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Michael Hansen

Semper Solaris kept the work area neat and cleaned up well upon departure, Roland was my energy consultant and answered all my questions I had and provided great customer service, the whole team was efficient and quick. I would definitely recommend this team as they are positioned to be around a long time for their customers. I see they do windows now and all other home energy products. I'll be sure to contact them when my HVAC goes out.
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Maka Nui

Our installer, Sebastian and his team were excellent, super communication and instructions with regards to our battery storage and the subpanel and the array that was placed on the roof. Always arrived on time. Great job. They will do our roof next.
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Frequently Asked Questions

How quickly can Semper Solaris schedule solar service?

Appointments are often available in just a few days across California.

What can Semper Solaris's solar diagnostics identify?

Diagnostics can identify inverter failures, wiring problems, battery malfunctions and low production.