4.6 
93 *The Angi rating for Solar Panel Service companies in Vacaville, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Solar Panel Service needs.
*The HomeAdvisor rating for Solar Panel Service companies in Vacaville, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Solar Panel Service needs.
Last update on June 25, 2026
Serving Vacaville, CA and surrounding areas
Approved
In business since 1980
Free estimates
Warranties offered
"Project is not done yet but contract was signed,"
+10
Serving Vacaville, CA and surrounding areas
Approved
In business since 2019
Free estimates
Warranties offered
"We had a 19 panel solar system installed at our home in Oakley by United Solar. They were very responsive and got the job done quickly! We will be back for any expansions or upgrades in the future."
+7
Serving Vacaville, CA and surrounding areas
Approved
In business since 2014
Free estimates
Warranties offered
"Very reliable fast with the job pricing was amazing. Would recommend this company to anyone customer service was very good and helpful"
+4
Serving Vacaville, CA and surrounding areas
Approved (Corporate)
In business since 1996
Free estimates
Warranties offered
"We are so excited that NRG helped us to install Solar Panels on our house in San Francisco! Their entire team was wonderful from their first presentation providing us with all the information to the completion of the installation. Their installation staff was wonderful and completed the project without a hitch. Nicole Greenwood our customer service rep kept us informed of each step along the way and made everything easy. We had gotten estimates from two other companies and are glad we went with NRG. No worries and a wonderful experience. We will recommend NRG without reservation. Thanks to your whole team! Marge B."
+5
Serving Vacaville, CA and surrounding areas
Approved
In business since 2023
Free estimates
Emergency services offered
"Jeff was great to work with. He took the extra time to discuss questions we had while making sure our solar project was managed seamlessly from start to finish. Everything was planned for and taken care of, down to the small details where his crew took the time to color match the new electrical conduit on the roof as well as on the exterior wall of the house. The entire process was completed in a timely matter, from the initial planning stages, through permits, installation and inspections."
+1
Serving Vacaville, CA and surrounding areas
Approved
In business since 2022
Free estimates
Emergency services offered
"I had a wonderful experience with Solar Sesame. My salesperson Emanuel was professional, courteous and truly awesome to work with... Thank you guys so much..."
+20
Serving Vacaville, CA and surrounding areas
Approved
In business since 2016
Free estimates
We specialize in all your home solar panel and battery installs. We pride ourselves on the quality work we provide, while delivering great customer service! Check out our home solar offerings below and call -or- click to schedule a free estimate today.
+1
Serving Vacaville, CA and surrounding areas
Approved
In business since 1991
Free estimates
Emergency services offered
"Unfortunately my husband s company is moving us to the midwest. Even though we had a signed contract with Rick and Teresa at Sunriver Solar, they we very understanding and basically told us not to worry about it and to enjoy our next adventure. They even asked if they could help us with any of the moving stuff!!! They are a delight to work with, they do everything, they kept us up to date on what was going on, and, even though we could not work with them, we would highly recommend them. You really cannot go wrong with Sunriver Solar."
+12
Serving Vacaville, CA and surrounding areas
Approved
In business since 1981
Emergency services offered
Warranties offered
"Technician was prompt and work was completed quickly."
+36
Serving Vacaville, CA and surrounding areas
Approved
In business since 2019
Free estimates
Warranties offered
"I have to have my roof replaced of the 3 companies that came out Spartan was the only one who addressed the leak I was concerned about. The other companies were going to charge me a bunch of money and let it still leak. They were not going to address it until it was an issue and tell me it was not covered. Spartan was top notch start to finish. The guys working on the house were awesome as well as every one I worked with. I would highly recommend them."
+24
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