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Ambrose Solar

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LAST UPDATED: May 19th, 2023

Ambrose Solar (also called SunPower by Ambrose) is a SunPower Master Certified solar installer based in Vacaville, California. Founded in 2013, the solar company has been installing some of the best solar PV systems, battery backup solutions, and solar storage options in the industry.

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The Good

  • SunPower Master Certified
  • High-Quality Solar Equipment
  • Robust Warranties
  • Multiple Financing Options

SunPower Master Certified

As the name suggests, SunPower by Ambrose is a SunPower Master Certified solar installer. This designation is only awarded to superior solar companies that either meet or exceed SunPower’s rigorous selection process. Every facet of the company, from customer service to installation, to post-installation satisfaction meets SunPower’s stringent criteria, and sets Ambrose Solar apart from the majority of solar providers.

This certification is also given to companies that are invested in their local communities, and have demonstrated an expert knowledge of and commitment to the unique needs and challenges facing their local market, along with local regulations and permitting requirements. 

High-Quality Solar Equipment

That SunPower by Ambrose primarily installs equipment manufactured by industry-leader SunPower should come as no surprise. SunPower builds a premier suite of solar panel modules that are second to none, averaging an energy efficiency quotient of 22.8 percent (industry high). All SunPower panels also come with a 25-year warranty.

In addition to solar panels and inverters from SunPower, Ambrose Solar also provides solar energy storage through the SunPower SunVault system. Like the Tesla Powerwall (which Ambrose Solar also installs), the SunPower SunVault stores additional solar energy that can keep the lights on at night or protect the home against a sudden power outage or utility grid interruption. The SunVault is smart, and can automatically adjust when the system draws power from the utility grid to maximize savings. Last of all, the system can be easily monitored in real-time through a handy mobile app.

Robust Warranties

As mentioned above, Ambrose Solar attaches SunPower’s standard manufacturer’s warranty of 25 year to every solar panel installation. The company also carries a 25-year warranty that covers against problems caused by installation errors, meaning not only does Ambrose Solar install superlative solar energy systems, but the company guarantees its work for the entire 25-year lifespan.

Multiple Financing Options

Not only can homeowners in the Solano Valley purchase a solar PV system out-of-pocket through Ambrose Solar, they can also finance their system through a third-party loan or home-equity line of credit (HELOC) for zero money down and low interest rates. Interested parties can also lease a system through Ambrose Solar, which acts much like a rental agreement. The advantage of a lease is two-fold: low monthly payments, and no burden of ownership (i.e. installation and maintenance costs are the sole responsibility of Ambrose Solar).


The Bad

  • No NABCEP Certification
  • Solano Valley Only

No NABCEP Certification

Despite offering one of the best solar products on the market in SunPower’s Equinox system, Ambrose Solar does not appear to have a certification from the North American Board of Certified Energy Practitioners (NABCEP). The lack of this certification in no way implies that Ambrose Solar does subpar work. However, in a flooded California market with hundreds of solar providers, every advantage, no matter how small, counts. The NABCEP authors rigorous certification programs that heighten the installation and technology literacy standards of the solar industry.

Solano Valley Only

Ambrose Solar is only available to residents in the Solano Valley of California, and is just one of hundreds of companies present in this region. Promoting verified Ambrose Solar Reviews from actual, satisfied customers, can be an effective way to improve the company’s reputation and further set it apart from the competition.


The Bottom Line

Overall, Ambrose Solar could not have landed a better partner in the industry than SunPower. The Master Certified status alone is endorsement enough that the company is far and above many other solar providers in the area in terms of customer satisfaction and quality of solar installation. The addition of verified customer reviews and NABCEP certification will only bolster the company’s already stellar reputation. Customers in and around Vacaville, California are encouraged to obtain a free quote from this company.

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Sharon Vacaville, CA

I want to say from the beginning of my solar battery project to the end I had a great experience with Ambrose Solar. I started out with Kelsey C who was amazing. I was then put in touch with Darlyn N, Noelle F and lastly Stephanie R. What a great team! The installation was a breeze and that team was also fabulous! Thanks again!

4 months ago


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Billy Wren Fairfield, CA

Sales representative was honest and forthcoming. He answered all of our questions. I had done a lot of investigation into solar panels and companies. They made a complete plan and executed it from installation to activation on time and delivered on all of their promises. It’s been nice not having a $500 monthly electricity bill even running the air conditioning and our pool pumps.

1 year ago


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Christopher Vacaville, CA

Customer Review Video

1 year ago Edited June 22, 2022