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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 Panels For Electric System - RepairSolar Panel InstallSolar Panels For Electric System - Install - For Business+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."
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+18

Response time4 days
3 neighbors recently requested a quote
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

20 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

25 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 well pumps range from needing 200 watts of power to as much as 12,000 watts for heavy-duty pumps. Since the most common and cost-friendly solar panels are 100-watt panels, you’ll need between two and 12 panels. The average is between two and eight panels for standard pumps. Based on the average cost of solar panels ($1 to $1.50 per watt), you’d pay between $200 and $1,800 for your well pump solar panels—not including installation.

Ideally, you want to place them facing true south. This is different from what a compass shows, which is called the magnetic south. You can find true south by using an online calculator as long as you know the longitude and latitude of your property. Solar panel placement is key to maximizing the energy you generate, so this is an important step.

You can install solar panels on a flat or pitched roof, but keep in mind that they will need to rest at a 30- to 50-degree tilt for optimal sun absorption. It costs more to install solar panels on a flat roof because you will need to install a framing system and likely hire a structural engineer. If your roof has a pitch of more than 40 degrees, it may not be a good candidate for solar panels.

While you can minimally overshoot the number of solar panels you need for your home, it's not smart to go too far. Not only is the extra cost unnecessary, but your state may put caps on how much energy your home can produce and send back to the grid. It is always best to work with a solar energy professional to determine the best system size for you.

In almost every case, solar panels need to be removed to replace roof shingles. In some cases, such as solar installations where the panels are on raised platforms above the roof surface, installers may be able to install new shingles without removing the solar installation. However, to get a quality roofing installation, panels need to come off. Most roofing contractors won’t remove or reinstall solar panels as part of a roofing project, so you’ll need to contact your solar provider.

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.