Semper Solaris in El Cajon, California

Updated Mar 11, 2025

1 619-493-4361    1805 John Towers Ave, El Cajon, CA 92020
Semper Solaris is a leading local company in El Cajon offering top-quality solar, battery storage, roofing, and heating and air services.
4.7
799 Reviews
★★★★★
Google Rating
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About Semper Solaris

  • Semper Solaris was founded in 2012 with a mission to help California homeowners escape the ever-rising costs of traditional energy companies. Co-founders Kelly Shawhan, a former United States Marine Corps Captain, and John Almond, a seasoned business leader with a decade of experience in construction, saw an opportunity to bring military values—honesty, integrity, and hard work—into the world of solar power. With their combined experience and passion, they set out to help homeowners declare their independence from energy companies by embracing the then-emerging technology of solar power. Starting in the competitive solar market of San Diego, Semper Solaris grew by standing out through exceptional customer service and high-quality installations. Their military discipline and attention to detail became the foundation of every project, earning them a reputation as a trusted, local, veteran-owned business with thousands of 5-star reviews. Several years after launching, Semper Solaris expanded its services to include battery storage, roofing, and HVAC, knowing they could apply the same values to these verticals. Today, the company continues to offer comprehensive home improvement services while maintaining its strong connection to the veteran community. Through the Semper Cares initiative, Semper Solaris gives back by providing energy solutions to deserving veterans and hiring veterans whenever possible. As Semper Solaris grows into new states and adds more services, the company remains dedicated to instilling its core values into every employee and project. With a commitment to quality, service, and community, Semper Solaris is proud to be a leader in solar and home improvement services, and they will continue to expand to better serve homeowners across the country.

    • Solar Panel Installation: Professional installation of solar panel systems for El Cajon homes
    • Battery Storage Installation: Installation of solar backup battery systems to store energy
    • Roofing Installation: Complete roof replacement and repair services
    • Roofing Repair: Professional repair of damaged roofs
    • Heating and Air Conditioning: Installation and service of HVAC systems
    • Free Estimates: Complimentary quotes for all services
    • Solar Incentives Assistance: Help with accessing solar tax credits and incentives
    • Semper360 Program: Comprehensive home energy solutions

    • Solar Panels: High-quality residential solar panel systems
    • Tesla Powerwall: Battery storage system for solar energy
    • Enphase Batteries: Alternative battery storage solution
    • Owens Corning Roofing: Premium roofing materials
    • HVAC Systems: Heating and air conditioning equipment
    • Samsung Ductless Systems: Efficient heating and cooling without ductwork
    • Dual Fuel HVAC Systems: Versatile heating and cooling solutions
    • Solar Attic Fan: Energy-efficient attic ventilation
    • Whole House Fan: Complete home cooling solution
    • Solar Tube Skylights: Natural lighting systems
    • Gutter Guards: Protection for rain gutters
    • Rain Gutters: Water management systems
    • Radiant Barrier: Heat reflection technology
    • Rat Proof Attic: Pest protection systems
    • Attic Insulation: Energy-efficient home insulation

    • 50 Year Warranty: For roofing installations
    • Lifetime Warranty: For residential roofing

    • Preferred Contractor: For roofing installations

    • Owens Corning: Roofing materials partner
    • Tesla: Battery storage partner
    • Enphase: Battery storage partner
    • Samsung: HVAC systems partner
    • SDGE: Works with their grid systems for energy solutions

    • License: CSLB 978152
    • Hours: 7:00am to 12:00am
    • Location: 1805 John Towers Ave, El Cajon, CA 92020
    • Phone: (619) 357-4142 / (888) 210-3366

  • Phone
    1 619-493-4361

    Address
    1805 John Towers Ave, El Cajon, CA 92020

    Business Hours

    Monday: 7AM-12AM

    Tuesday: 7AM-12AM

    Wednesday: 7AM-12AM

    Thursday: 7AM-12AM

    Friday: 7AM-12AM

    Saturday: 7AM-12AM

    Sunday: 9AM-12AM


Reasons Why You Should Work With Semper Solaris

  • 1 Volume Residential Solar & Battery Installer in California
  • Expert team with unrivaled passion and expertise in the local area
  • Never compromise on quality: if it's not good enough for their own homes, they won't rest until it is
  • Ontime Services, Verified Professionals, and Top Manufacturers
  • Freedom from SDGE with battery storage solutions
  • Protection against Time-of-Use rate spikes
  • Safety net of power during SDGE outages
  • Less dependence on the SDGE grid
  • Maximizes solar investment and adds value to El Cajon homes
  • Cool Roof Protection available
  • $550 Refer-a-Friend program

Customer Reviews for Semper Solaris

  • Latest Review

    ★★★★★

    For now. The company has met my standards. The quality of work and craftsmanship is excellent. They pay attention when you ask for something to be done a certain way. And they go above and beyond to make sure that everything is done to the customers standards. For now, I am very pleased. I hope to be able to follow up years from now and continue to say that they did an amazing job. We did a huge job makeover, roofing, tiles, solar panels, battery, revamp electrical on the panel, heater, new ac units, wiring, etc. There are a few things we had to iron out with the team from time to time. But Rhami and Christian went above and beyond to resolve my problems and hesitation..
    Jon R.

  • ★★★★★

    The support person (David) was very helpful. We were able to diagnose the issue with a phone call and a teams visual. He did follow up and continued to monitor our situation.
    David Mckinsey

  • ★★★★★

    Janice took great care and persistent planning to get Omar and Jorge out to fix roof leak. Omar took the extra time to find a small hole that caused intermittent problems.
    Sloop B

  • ★★★★★

    I was in the hospital for a few days and didn't check our solar power app every day or so as usual until a few days after I had returned home. I discovered the system was not connecting to my app and I feared the solar power system might have been down (and losing $$ to SDG&E as a result!). My wife checked the display and saw the "Check DC Generator" alert and the red light, so we knew we had a problem. I called Semper Solaris and a virtual appointment with a technician was scheduled for a few days later. I was pleasantly surprised when Semper Solaris' technician Josh called me on the phone a couple of days later and asked if I had the time to troubleshoot with him then rather than when the virtual online appointment was scheduled. YES! I wasn't doing much of anything at home other than recuperating and was very happy to troubleshoot earlier than scheduled! Unfortunately, my mobility was limited, and my wife was out shopping. I could not easily go out to our detached garage to help Josh troubleshoot, so he emailed me some troubleshooting directions (complete with photos!) to correct what he suspected was the problem and promised to call me back in a couple of hours after my wife returned home. When she returned, I showed her the directions and photos and helped to explain what the procedure would be when Josh called again. Josh called back right on time, and my wife went to the garage as Josh put us in a 3-way phone conversation for troubleshooting. My wife had no problem following Josh's directions! After just a few minutes, the problem was corrected, and the system was operational once again! Thank you, Josh! We have kept the email and instructions you sent so if this anomaly ever reoccurs, then we will be prepared and hopefully not have to contact you again, although it was a pleasure working with you! Josh promised to closely monitor our solar power system for the rest of the week to ensure it continued operating as normal, and I did too! When he called me on Friday afternoon to tell me that it remains solidly operational, I agreed because I was closely monitoring it via my phone's app too. Josh closed out the trouble ticket and I thanked him again! We could not be happier with our solar power system since it was installed about 8 years ago! With SDG&E costs ever increasing, our system has without a doubt already paid for itself! Thank you, Semper Solaris and Josh!
    Frank Sutton

  • ★★★★★

    I have been a Semper Solaris customer for a little over 4 years now and have always received wonderful service. Anthony was here the other day to service my ductless air conditioning unit and he was friendly, professional and took his time to make sure everything was working properly. He even took time to answer my grandchildrens countless questions. Thank you once again for superb service and we will be requesting Anthony for future maintenance services.
    Barbara Brunelle

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Get in touch with Semper Solaris in El Cajon today!

Address: 1805 John Towers Ave, El Cajon, CA 92020

Phone: 1 619-493-4361

Hours:

Monday: 7AM-12AM

Tuesday: 7AM-12AM

Wednesday: 7AM-12AM

Thursday: 7AM-12AM

Friday: 7AM-12AM

Saturday: 7AM-12AM

Sunday: 9AM-12AM

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