Skip to main content


SolarUnion is the only Diamond Certified Solar Company in the State of California that offers a 25-year performance guarantee on (i) parts, (ii) labor, (iii) roof attachments and (iv) power output.
We are rated highest in quality on customer satisfaction, insurance coverage, license and business practices. We offer a premium solar experience to our customers.
The SolarUnion Team includes in-house certified C46 and C10 solar electricians and carefully vetted installers with decades of experience installing residential solar across California. We can execute on concrete tile roofs, flat roofs, tar and gravel roofs, metal roofs and foam roofs.
Each premium SolarUnion solar system includes:
*All permits, inspections and conversations with electrical, building, structural, environmental and fire inspectors. SolarUnion also works with your electric company for interconnection of the solar system to the grid
*Optimizers (one per panel) to fight shading issues, maximize system performance, and monitor output panel by panel.
*Premium inverters (rated excellent), battery backup ready.
*Individually-designed solar systems that are tailored to your needs and preferences. Each customer is assigned a SolarUnion Project Manager from Day 1 who is the primary contact throughout the entire solar process - from design to interconnection. We work with each of our customers to make sure they are satisfied with the components, service, aesthetics and long-term performance of their premium solar system.
*Complimentary monitoring hardware and software, including a mobile app.
SolarUnion logo
Avg rating
Elite EnergySage badge
Screened & Verified

Get free solar quotes from local installers on EnergySage

Our pre-vetted network of installers compete for your business, which allows us to give you more options and the best deals.

Get Quotes
We are a full-service solar developer and installer founded in the heart of Silicon Valley. We sell, design, install and service high efficiency solar systems to deliver clean electrical power at affordable rates. Our clients (residential homeowners) start to enjoy savings from Day 1, with significant cumulative savings over the life of the system. Our goal is to transform the market and enable all Californians to unlock the power of clean energy.
Year Established
Phone Number
Reasons Why You Should Work With Us
  1. We offer a 25-year performance guarantee on (i) parts, (ii) labor, (iii) roof attachments and (iv) power output.

  2. We use in-house certified solar electricians and carefully vetted installers with decades of experience installing residential solar.

  3. Each customer is assigned a SolarUnion Project Manager from Day 1 who is the primary contact throughout the entire solar process

Elite EnergySage badge

Elite installers earn top ratings from customers, endorsements from vendors, and win customers more frequently than their peers.

We speak

English; Spanish

Services Offered

  • Installation
  • Financing
  • Energy Auditing
  • Construction
  • Electrical Contracting
  • General Contracting
  • Solar Repair & Maintenance

Workmanship Warranty

SolarUnion customers enjoy a 25-year power output, workmanship, parts and labor guarantee


Fully licensed electrical and solar contractor (C-10 Electrical and C-46 Solar)


Fully insured/bonded | Insurance policy in excess of $5,000,000 per event at the system level.


Panasonic Authorized Installer with Panasonic INC providing a 25 year warranty parts and labor warranty on all SolarUnion systems. LG Pro installer. REC Certified Professional installer. SolarEdge certified installer.

Industry Certifications

  • Better Business Bureau
  • Solar Energy Industries Association
  • SunPower Premier Dealer

Manufacturer Certifications

  • Certified Installer
  • Premium Installer

What Customers Are Saying

181 reviews
Average Rating 181 review(s)
Leave a Review
Excellent Service and Performance

Solar Union was easy to work with from my first interaction with them. I knew nothing about the different types of solar and they walked me through every step and even helped me compare different systems, setups and prices that competitors were offering. They were very responsive over e-mail and the phone and knowledgable enough to answer any questions I had. Honestly the entire experience was very positive, and the only hiccups came from issues with city permits or PGE applications, but the SolarUnion reps were always quick to provide any documents or guidance that would help move the process along -- none of the challenges had to do with SolarUnion themselves. Even after the install, the customer service is still very responsive and helpful with any questions about our setup. I'd recommend them to anyone in the market. The whole process was effortless, and for a project being built from the ground up, it was a breath of fresh air not having to worry about the solar system setup.

Posted by jjprine on Aug 14, 2023

Shortly after asking for quotes here, I got a phone call from SolarUnion. I had given no permission for any of my contact information to be release to installers. Note EnergySage's blurb on this from: ""We protect all your contact information until you decide to share it with our installer network." Somehow, they managed to get access to my phone number in violation of that policy. Anyway, that call was from "Gelica from SolarUnion" at (415) 992-3283. Even though I've closed off my Marketplace by saying I've picked another (non-EnergySage vendor), I continue to get spam phone calls from them. Oh, and BTW, SolarUnion's quote here (as were 3 of the 4 quotes I received) was non-responsive: I put exact requirements in my request and they ignored them.

Posted by dlessnau on Aug 05, 2023
SolarUnion FTW

We chose to work with SolarUnion after analyzing offers aggregated on Energysage. SolarUnion was able to install our system before the promised delivery date and the system is producing at or above projections. We enjoyed working with the SolarUnion team on this project

Posted by sprober1 on Aug 02, 2023
Solar Panel

They were fast and efficient. The solar panels is so efficient that the energy bill $30.00.

Posted by boblohr on Aug 01, 2023
Happy customer

My overall experience with SolarUnion was great. They helped us secure the NEM2.0 status in time, which made the solar installation more cost effective. I especially appreciate the expertise and great customer service from Josh Rhoades (Clean Energy Consultant), Erika Aguirre (Customer Experience Manager) and Itzel Navarro (Project Manager).

Posted by luninguh on Jul 31, 2023
Excellent work

I am very satisfied with the work Solar Union has done. Because this is an expensive project, I informed Renzo (Co-owner) that I will not be able to take on this project if I cannot get SF city rebate for low-income family. He assured me that they will not start the project until I get approval from the city to get a rebate and put the condition on my contract, which gives me option to back out of the contract if I do not qualify for the rebate. Fortunately, I was qualified for the rebate and the whole entire team took care of everything from acquiring permits, installing solar panels, getting city inspections approved, and getting PTO (Permission to operate from PG&E) in a timely fashion. I would recommend anyone who is thinking about installing solar panels to consider Solar Union because they are very professional and willing to go above and beyond to answer any questions or request you may have in a timely manner.

Posted by jennynmarlon on Jul 11, 2023



Other Locations

States Served