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9 Years In Business

Company Details

  • Bilingual

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18120 Bollinger Canyon Road
San Ramon, CA 94583


  • Mon: 9:00 AM - 6:00 PM
  • Tue: 9:00 AM - 6:00 PM
  • Wed: 9:00 AM - 6:00 PM
  • Thu: 9:00 AM - 6:00 PM
  • Fri: 9:00 AM - 6:00 PM
  • Sat: 10:00 AM - 3:00 PM
  • Sun: Closed
View All Details & Credentials

Service Details

    Areas of Expertise

    • Solar Installs
    • Solar Repairs
    • Grid-tied Solar Sytems Services
    • Off-grid Solar Sytems Services
    • Ground-mounted System Services
    View All Offerings and Cities Served

    Cost Information

    • Free Estimates
    • Warranty Offered
    • Credit Cards Accepted


    2 Verified Reviews
    • 5
    • 4
    • 3
    • 2
    • 1

    Highly rated for

    • Quality
    • Value
    • Customer Service
    Showing 1-2 of 2 results
    5.0 Charlene S. Vallejo, CA

    Carsten did an excellent job installing our solar panels! He made the entire process seamless and easy, from initiating the PG&E application and obtaining the city permit, to installation and finally connecting to the grid. I was a little nervous about working with such a new company, but have no regrets choosing Gomaxxx now that the process is complete. We also received a quote from a large solar panel company, but Carsten charged a much fairer price and we wanted to support a local business. We met with Carsten a couple of times before signing the contract to review the design plans and ask him questions. He was very professional, knowledgeable, and provided thorough explanations. He was patient with answering our questions and promptly responded to all follow-up emails. We requested that the installation be completed before the end of the year. When we found out that the panels in our original design plan wouldn't be available until early next year, Carsten selected a different brand of panels, which I think were even better and would be available immediately. The installation took a little more time than expected, but Carsten kept us informed throughout and he took his time to ensure everything was properly done. We are very pleased with the quality of the materials and workmanship. When we received final approval from the city inspector and PG&E (which happened only one day after installation was complete!), Carsten turned our system on and even did some trouble-shooting to connect our inverter to wifi so we could monitor our production in real time. It's been about one week since our system has been in operation and we are very happy with our production so far! While everything happened very quickly, we never felt rushed, and Carsten was great to work with throughout the process. He provided detailed and well-prepared documentation of the design and wiring, as well as all of the equipment manuals. I wouldn't hesitate to work with Carsten again and highly recommend Gomaxxx to anyone interested in going solar.

    Response from Company:

    Thanks Charlene for the nice review. It was my pleasure to install that system for you, which works great and is producing as predicted.

    5.0 Justin ..

    Good work.


    GOMAXXX, Inc.
    9kW Solar System, Vallejo
    5.2kw Gried-tied System
    5.2kW Gried-tied System

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