SolarUnion

Diamond Certified Company Report
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SolarUnion
202 SURVEYS
10 CONSECUTIVE YEARS
SINCE APRIL 2016
CERT 2351

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202
Verified Customers
Surveyed
Customer Loyalty
Customer Satisfaction
Helpful Expertise

Company Credentials

  • Liability Insurance
  • Business Practices
  • Current Complaint File
  • Workers Compensation
  • License Verification
  • Legal & Finance

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Diamond Certified Company Report SUMMARY UPDATE November 2024

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SolarUnion

Rated Highest in Quality and Helpful Expertise for 10 Consecutive Years.

location
1700 Montgomery Street Suite 108, San Francisco, CA 94111

Quick Summary

  • Diamond Certified since 2016
  • Provides solar services for residential and light commercial clients throughout California
  • Offers a 25-year, bumper-to-bumper performance guarantee
  • Available 24/7 to handle emergencies

Top News Updated

TRENDING PROJECTS

SolarUnion is developing robotics and artificial intelligence to optimize the upgrade of its main service panels. This innovative approach aims to enhance efficiency and precision in the company’s installations, ensuring its systems are not only effective but also future-ready.

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NEW PRODUCTS & SERVICES

SolarUnion has introduced a new service called Repairs & Retrofits that’s designed to assist both existing customers and those from companies that are no longer in business. The service focuses on repairing solar systems, as well as removing and reinstalling them for roof repairs or complete system replacements. SolarUnion can also help customers enhance their setups by adding new panels.

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Top Survey Responses

From a recent Diamond Certified Survey Response: “They made sure I got the most for my money, which was important to me. They didn’t pressure me into buying anything and they had top-tier equipment for a reasonable price.”

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From a recent Diamond Certified Survey Response: “They answered all my questions and got the work done on time. I had a maintenance issue but they came right out on a Friday to fix it right away. They’re very attentive.”

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Awards & Milestones

SolarUnion has been selected as a vetted installer for the Bay Area SunShares program for the second consecutive year. This initiative simplifies and makes solar/energy storage more affordable for Bay Area residents by leveraging collective buying power and negotiating discounts with trusted installers.

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SolarUnion has earned the designation of Panasonic Solar Premium Installer. This award reflects the company’s commitment to excellence in solar installation and dedication to providing high-quality solutions for its customers.

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SolarUnion
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SolarUnion

Solar
|
San Francisco  Sonoma Counties
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202 SURVEYS
10 CONSECUTIVE YEARS
SINCE APRIL 2016
CERT 2351

Rated Highest in Quality & Helpful Expertise Performance Guaranteed

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Diamond Certified Researched Articles on SolarUnion

researched article

A solar panel installation project by SolarUnion

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SolarUnion provides a complete range of solar services for residential and light commercial clients throughout California. The company designs, sells, installs, and operates photovoltaic (PV) solar systems and battery (storage) backup solutions using proven technology from manufacturers with strong warranties. Its certified solar technicians are trained in-house to conduct solar-readiness audits, savings estimates and roof inspections; perform electrical panel upgrades; install solar electric vehicle charging stations; and more. In the face of increasing challenges from global warming, SolarUnion helps diverse property holders reduce their carbon footprint, constantly adapting the latest technological tools to further that process.

With a vast knowledge of financing options, SolarUnion helps customers own their systems from Day 1 while providing a comprehensive performance guarantee, with reliable warranties and complimentary monitoring, to add transparency and assess system performance. This solid path to energy independence and financial gains for homeowners has been critical for the company’s success.

SolarUnion provides a 25-year, bumper-to-bumper performance guarantee, which beats competitors who only offer standard manufacturers’ warranties or limited 10-year workmanship guarantees. “Our 25-year roof attachment guarantee is second to none,” emphasize Founders Ivan La Frinere-Sandoval and Renzo Castillo. “All of our warranties are transferable.”

Diamond Certified Researched Capabilities on SolarUnion

Service Area

serving area
Northern,
Central and
Southern California
Headquartered in San Francisco
Serving Northern, Central and Southern California Headquartered in San Francisco

Main Services

Solar
  • Commercial Solar Installation
  • Solar Energy Solutions
  • Solar Generators
  • Solar Panel Cleaning
  • Solar Panel Financing
  • Solar Panel Installation
  • Solar Panel Leasing
  • Solar Panel Maintenance
  • Solar Repair
  • Solar Roof Tiles
  • Solar System Installation
  • Solar Systems

Additional Services

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Company Info

Hours
Mon
08:00 am - 08:00 pm
Tue
08:00 am - 08:00 pm
Wed
08:00 am - 08:00 pm
Thu
08:00 am - 08:00 pm
Fri
08:00 am - 08:00 pm
Sat
08:00 am - 08:00 pm
Sun
08:00 am - 08:00 pm
Closed
Contact
SolarUnion

Capabilities Table

Company Name
SolarUnion
Managers
Renzo Castillo & Ivan La Frinere-Sandoval, Founders
Years in Industry
30+ (Combined)
License
990354
Memberships
Better Business Bureau
Founded
2014
Payment Accepted
american express,
discover,
mastercard,
visa

Key Factors

Select Photos From SolarUnion

1 of 25Picture of SolarUnion enhances energy efficiency with expertly installed solar panels on a residential rooftop, reflecting their focus on quality outcomes. Consistently achieving a Highest in Quality rating underscores their commitment to excellence. Copyright ©2025 Diamond Certified Resource

 - SolarUnion
SolarUnion enhances energy efficiency with expertly installed solar panels on a residential rooftop, reflecting their focus on quality outcomes. Consistently achieving a Highest in Quality rating underscores their commitment to excellence. Copyright ©2025 Diamond Certified Resource
Picture of SolarUnion enhances energy efficiency with expertly installed solar panels on a residential rooftop, reflecting their focus on quality outcomes. Consistently achieving a Highest in Quality rating underscores their commitment to excellence. Copyright ©2025 Diamond Certified Resource

 - SolarUnion
Picture of Solar panels glisten under the autumn canopy, a testament to SolarUnion's commitment to quality outcomes. Their expertise ensures optimal energy solutions for homes like this. Copyright ©2025 Diamond Certified Resource

 - SolarUnion
Picture of SolarUnion showcases a pristine array of solar panels glistening under the sun, reflecting their commitment to quality outcomes. As a company recognized for expertise and quality, SolarUnion ensures the highest standards in solar energy solutions. Copyright ©2025 Diamond Certified Resource

 - SolarUnion
Picture of SolarUnion's sleek solar panel installation integrates seamlessly with the urban skyline, reflecting a commitment to sustainable energy solutions. The company focuses on quality outcomes, consistently achieving a Highest in Quality rating. Copyright ©2025 Diamond Certified Resource - SolarUnion
Picture of On a clear day, SolarUnion's expertly installed solar panels gleam atop a rooftop, capturing the essence of clean energy. Renowned for high customer satisfaction, the company ensures sustainable solutions. Copyright ©2025 Diamond Certified Resource

 - SolarUnion
Picture of Sunlight dances across a rooftop array of solar panels, a testament to SolarUnion's dedication to quality outcomes and renewable energy solutions. Their installations are a reflection of excellence, consistently achieving a Highest in Quality rating. Copyright ©2025 Diamond Certified Resource - SolarUnion

Diamond Certified Expert Contributor Advice & Tips

Erika Aguirre is customer experience manager at SolarUnion, a Diamond Certified company. She can be reached at (888) 815-6633 or erika@solarunion.com.

Erika Aguirre is customer experience manager at SolarUnion, a Diamond Certified company. She can be reached at (888) 815-6633 or erika@solarunion.com.

Erika Aguirre: A Solar Disposition

By James Florence, Diamond Certified Resource Reporter

Looking for a career change, Erika Aguirre found the right fit working in the solar energy industry. “I have a degree in communication and my area of specialty is marketing,” she explains. “Before I got into solar, I was working in the restaurant industry, doing marketing for the TGI Friday’s franchise. I was feeling ready for a career change, so I started looking around and saw a listing for a position with a solar company. I liked th...

Read Full Article - Erika Aguirre: A Solar Disposition

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SolarUnion Ratings and Survey Responses (reviews)

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SolarUnion
202 SURVEYS
  • 4.3
  • star image
  • star image
  • star image
  • star image
  • star image
10 CONSECUTIVE YEARS
SINCE APRIL 2016
CERT 2351

Diamond Certified Ratings Dashboard

Customer Satisfaction

Customer Loyalty

Helpful Expertise

Company Credentials

  • Liability Insurance
  • Business Practices
  • Current Complaint File
  • Workers Compensation
  • License Verification
  • Legal & Finance
SolarUnion

Based in San Francisco, CA

4.3 avg. star score from 202 Verified Customer Phone Survey Responses

(Reviews: Scroll down to read them.)

Our surveys of only verified real customers produce the country’s most accurate ratings of local companies. SolarUnion scored Highest in Quality and Helpful Expertise and passed the credential-based checks to earn Diamond Certified.

A Star Equivalent Score is calculated for each verified customer rating by weighting the 1–10 Quality score, the YES/NO Loyalty (intent to return) score and the YES/NO Helpful Expertise score. If Helpful Expertise wasn’t surveyed or didn’t apply, it’s simply not shown.