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TRUSTED BY DIAMOND BAR, CA HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon50
    Verified solar panel services reviews

Top-Rated Solar panel pros in Diamond Bar - Updated Nov 2026

Avatar for Get Smarter Solar
Get Smarter Solar
4.8(
35
)
Solar Panel InstallSolar Panels For Electric System - Install - For BusinessSolar Panels For Electric System - Repair+1 more

Serving Diamond Bar, CA and surrounding areas

Approved

In business since 2012

Free estimates

Warranties offered

"Having Sunpower install our Solar panels has been a great experience. Arvin helped explain the system, process the paperwork, and made sure the installation and inspections were all done on time. Sunpower system has saved us alot in electrical costs. We are so happy with how this has turned out. Our system is actually performing 25% more efficiently than expected!! A big thanks to Arvin for all his help throughout this process."
Additional Photos
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+18

Response time4 days
Recommended by93%of homeowners
Avatar for SunLux
SunLux
4.6(
72
)
Solar Panel Install

Serving Diamond Bar, CA and surrounding areas

Approved

In business since 2015

Free estimates

Credit card accepted

"I had an issue with our solar panel not producing any electricity so I called and left message for Garrett from Sunlux. Not only did he call me back the same day, but he basically diagnose the problem over the phone and sent someone from Sunlux to come to my house the next business day to confirm diagnosis that we had a bad inverter. A few hours later that day Garret called not only to schedule an install of the new inverter, but to my surprise he also said that because we were having problems with pigeons living under the solar panels that he would install critter guard to prevent the pigeons from going underneath the panels for no charge. I would highly recommend Sunlux for their professionalism as well as their great customer service."
Home Solar Installation - Corona
Home Solar Installation - Corona 2
Home Solar Installation - Claremont 1
Home Solar Installation - Claremont 2
Moreno Valley Solar Install

+13

Response time2 days
Response rate92%
Recommended by96%of homeowners
Avatar for NRG Clean Power
NRG Clean Power
4.6(
52
)
Solar Panel Install

Serving Diamond Bar, CA and surrounding areas

Approved (Corporate)

In business since 1996

Free estimates

Warranties offered

"After having a nightmare working with two smaller companies, I decided to go to NRG Clean Power for my solar needs. I?m understating when I say the experience was like night and day: efficiency, communication, and progress the whole way forward. Before I knew it, my installation was complete and my solar equipment was operational. I want to thank Miles in particular for his hard work and constantly being available to answer my questions. Everyone does their job right at this company. Wonderful experience and I?m saving money while helping the environment!"
Rooftop Solar
Solar Installation
Solar Panel Install
Home Solar Install
Solar System Install

+5

23 neighbors recently requested a quote
Recommended by77%of homeowners
Avatar for Power On Solar
Power On Solar
4.6(
5
)
Solar Panel Install

Serving Diamond Bar, 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.

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+1

28 neighbors recently requested a quote
D & M Solar Solutions
5.0(
4
)
Solar Panel InstallSolar Panels For Electric System - Repair

Serving Diamond Bar, CA and surrounding areas

Approved

In business since 2023

Free estimates

Customers say: Quick response

"Hired D&M Solar Solutions for a Solar removal/Reinstallation and New roof got it done in 2 Days at a great price job was done about 6 months ago has rained many days and no more leaksâ ¦ Luis is a very responsible/Responsive person Kept me informed of the process â ¦Would recommend for any roofing and solar projects"
Response time1 day
9 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for OC Solar
OC Solar
4.8(
6
)
Solar Panel Install

Serving Diamond Bar, CA and surrounding areas

Approved

In business since 2001

Free estimates

Credit card accepted

"I brought to the attention the 1 panel that had a sagging corner, my comment was ignored. Just this month I received an e-mail asking if I could use any additional services to me, in response I asked about the sagging corner and an unrelated technical question. They addressed my question but not my sagging corner. This is the reason I did not give them all 5 stars."
Nellie Gail
Nellie Gail
Nellie Gail
Nellie Gail
Nellie Gail

+11

1 neighbors recently requested a quote
Recommended by80%of homeowners
Avatar for EVERYSUN INC
EVERYSUN INC
4.8(
6
)
Solar Panel Install

Serving Diamond Bar, CA and surrounding areas

Approved

In business since 2024

Free estimates

Credit card accepted

Everysun is a residential solar energy company focused on helping homeowners switch to clean, affordable, and reliable solar power. The company designs and installs solar panel and home battery systems that reduce electricity costs and increase energy independence. Serving homeowners in California, Everysun delivers high-quality installations, long-term warranties, and a customer-first experience by combining efficient engineering, transparent pricing, and dependable service from consultation to ongoing support.

Solar Installation
Roof Preparation
Work in Progress
Black Solar Panels
Completed Array

+1

4 neighbors recently requested a quote
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Solar Panels FAQs, answered by experts

Solar shingles and solar panels are not the same. While solar shingles use the same technology as traditional solar panels, they integrate with your existing roof. That means they are used to build your roof instead of simply resting on top of it. When comparing solar shingles and solar panels, it's helpful to know that solar shingles are more aesthetically pleasing than solar roof panels. They also do better in harsh weather due to limited uplift from strong winds.

Solar panels can protect your roof from hail, as they can withstand hail up to 1 inch in diameter that falls up to 50 mph. Your solar panels may experience damage if the hailstones are bigger and travel faster. Your roof can still suffer hail damage, and it’s essential to look for signs and repair issues right away. Roof damage can lead to leaks and water damage inside your home.

There are a few great questions to ask a solar contractor or inspector when you speak to them. You’ll probably want to find out about the energy yield and efficiency of your array, ensuring the actual output matches the amount you calculated when installing the array in the first place. It’s also a good idea to find out about any damage or wear and tear on the array and to inquire about how soon you need to make repairs or replacements to essential components.

In most states, solar installers need to be licensed and insured as solar professionals, although some states don’t have specific requirements for installers. You can use our state licensing tool to check if an installer you’re considering hiring holds the proper licensing. No matter where you live, a member of your solar panel installation company must be a certified electrician to connect your panels to your home and the electric grid.

You can start narrowing your search for a reputable solar company by finding local, regional, and national companies that service your area and maintain positive reviews online. You should also check the Better Business Bureau’s (BBB) website to see if the company has complaints filed against them. Next, contact the remaining candidates and ask about installation timelines, warranty coverage, and financing options. Choose a company that offers a labor warranty that lasts at least 10 years and prioritizes cash purchases and solar loans.

The Diamond Bar, CA homeowners’ guide to solar panel services

From average costs to expert advice, get all the answers you need to get your job done.