Clean, Reliable, Renewable Energy Join the
Solarunion Family

When you're ready to experience premium, affordable home energy technology and storage solutions, we'll be there for you.

San Francisco Solar Company

Serving All of California with Our Premium Diamond Certified Services

Diamond Certified logoOur California solar experts at SolarUnion are dedicated to helping you harness the clean and renewable power of the sun in your home. We deliver the high-quality service, parts, and designs that you need—creating long-lasting, intelligent designs that can grow with you into the future. Our solar developers offer a turnkey solution with asset management for the entire life of your solar asset. Unlike traditional solar installers, our commitment to our clients goes beyond the installation alone. When you choose us, we treat you like family and always make sure to explain the entire solar process from start to finish. Every one of our installations carries a 25-year performance guarantee, which means we always fix underperforming systems at no cost to you, including labor and parts. We also offer an industry-leading 25-year roof integrity warranty.

We have offices throughout California, including San Diego, Stockton, and San Francisco, which enables us to provide unparalleled installation and service to the entire state.

No matter where you live, from San Diego to Sacramento, or beyond, SolarUnion stands ready to serve, providing the utmost care and personalized attention for every one of our customers.

Our services include:

Call us at (888) 815-6633 today to learn more about the benefits of solar energy and storage solutions in your home!

OUR MISSION Powering Autonomy with Resilience & Reliability

To make premium home energy technology accessible to all homeowners at an affordable rate that will reliably take care of their energy needs for 25 years.

Call (888) 815-6633 to Be A Part of the SolarUnion Family

Our Solar & Storage Services

SolarUnion is a full-service solar and storage electricity developer founded in the heart of Silicon Valley. We market, finance, build, and operate photovoltaic (PV) solar systems and this dedication to being your one-stop shop allows us to deliver clean electricity and storage solutions at affordable rates.

Customer Testimonials

We're Committed to Your Satisfaction
  • I recommend SolarUnion to anyone looking for a no-pressure, friendly, fast solar installation!

    “SolarUnion installed our solar panels back in 2019. I'm copying this review from the one I left on Yelp for convenience, but I'm happy to say that two years later we've still experienced no problems. ...”

    - Zack S.
  • Thank you Solar Union for your advice and clean installation

    “Solar Union installed an efficient panel system that addressed our electricity needs. They also connected us to a Tigo monitoring system that gives constant feedback on how well the panels are working ...”

    - Susan T.
  • I highly recommend Solar Union

    “Excellent, prompt installation and of top rated panels. We're very happy with results, including reducing carbon footprint and reducing PG&E bill from $100/mo to $10/month.”

    - Howie C.S.
  • I have told all my friends and neighbors about the benefits of our solar installation!

    “Dear Mr. Castillo and Mr. Sandoval, This note is just to inform you that the solar production at my residence for year two has exceeded the contracted amount. I am quite pleased, and the system has ...”

    - Larry
  • Operational in 5 weeks!!!

    “Unbelievable. Went from site inspection to system being fully operational in 5 weeks.”


The SolarUnion Philosophy

We want to be a reliable, long-term partner for our clients, so we focus on providing them with quality installations, strong guarantees, and timely maintenance for their solar investments. Our goal is to be your energy partner, which is why we make sure you are fully satisfied with our services. We have handled thousands of jobs and our experienced specialists are ready to help you with your every solar need.
  • We Treat Customers Like Family

    You can hold us accountable for decades. We will stand behind our work and do whatever it takes to remedy any issues you have.

  • Our Guarantee to You

    We offer a comprehensive Trifecta guarantee that covers for parts, labor and production for 25 years.

  • The Most Reliable Home Energy Provider

    We value delivering certainty when it comes to installing and maintaining clean, reliable solar energy.

  • We're Committed to Educating

    Solar is complicated and SolarUnion is here to educate homeowners not to push sales. We hire solar advocates, not sales reps.

  • We Respect the Roof

    We treat our customers' roofs like they are our own. An install will not be rushed if it means jeopardizing the integrity of the roof.

  • Making Solar Accessible to All

    Our goal is to help foster the adoption of renewable energy. No matter the type of roof or your credit, you can go solar.

  • SolarEdge
  • Quick Mount
  • SMA
  • REC
  • SunPower
  • LG
  • Panasonic Solar
  • Trina Solar
  • Diamond Certified

Be A Part of What's Happening at SolarUnion

Schedule Your Consultation Today

Fill out the form below or call us at (888) 815-6633 to get started with us.

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