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TRUSTED BY CASTRO VALLEY, CA HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon40
    Verified solar panel services reviews

Top-Rated Solar panel pros in Castro Valley - Updated Nov 2026

Avatar for ELLISON ELECTRIC AND SOLAR INC
ELLISON ELECTRIC AND SOLAR INC
5.0(
6
)
Solar Panel InstallSolar Panels For Electric System - Install - For Business

Serving Castro Valley, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Emergency services offered

"I recently had the pleasure of working with Ken at Ellison Electrical on a service panel upgrade for my electrical vehicle and completely rewired my new kitchen. Ken was incredibly patient, explaining every step of the process. He immediately understood the floor plan and installed everything to code. His attention to detail and knowledge was exceptional. The quality of his work is evident in every connection and fixture. The service panel upgrade was seamless, my kitchen looks amazing and now my home feels more secure and efficient. He was always punctual, respectful of my property. I highly recommend Ellison Electrical for any electrical project."
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+3

Response time2 days
Response rate100%
1 neighbors recently requested a quote
Avatar for NRG Clean Power
NRG Clean Power
4.6(
52
)
Solar Panel Install

Serving Castro Valley, 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."
Rooftop Solar
Solar Installation
Solar Panel Install
Home Solar Install
Solar System Install

+5

22 neighbors recently requested a quote
Recommended by77%of homeowners
Avatar for SOLARSESAME INC
SOLARSESAME INC
5.0(
6
)
Solar Panel Install

Serving Castro Valley, CA and surrounding areas

Approved

In business since 2022

Free estimates

Emergency services offered

"Had a great experience with Solar Sesame. The process was very quick, professional and tailored to my needs. I definitely recommend them as they are local and can handle any job, my Solar layout was complicated but we were able to do it thanks to Solar Sesame!"
11.21 kW, Shingle Roof
11.21 kW, Shingle Roof
11.21 kW, Shingle Roof
Solar Panel Install
Solar Panel Install

+20

Response time5 hrs
Response rate100%
31 neighbors recently requested a quote
Avatar for Power On Solar
Power On Solar
4.6(
5
)
Solar Panel Install

Serving Castro Valley, 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

29 neighbors recently requested a quote
Avatar for Soltari
Soltari
5.0(
3
)
Solar Panel InstallSolar Panels For Electric System - Install - For Business

Serving Castro Valley, CA and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

"I had Soltari install my solar panels and I’m really happy with how everything turned out. I was a little nervous going into it since I didn’t know much about the process, but they made it super easy to understand and handled everything. The team was professional, respectful, and just really easy to work with. They showed up when they said they would and made sure everything was done right. Now that it’s all up and running, I’m honestly so glad I decided to go with them. I’d definitely recommend them to anyone looking into solar 😊"
Tesla Powerwall
Full Backup Power
Energy Storage
Smart Monitoring
Emergency Power

+3

Response time6 hrs
Response rate100%
5 neighbors recently requested a quote
Avatar for Albert Nahman Plumbing, Heating, and Cooling
Albert Nahman Plumbing, Heating, and Cooling
4.4(
722
)
Solar Water Heater System - InstallSolar Water Heater System - Install - For BusinessSolar Water Heater System - Repair+1 more

Serving Castro Valley, CA and surrounding areas

Approved (Corporate)

In business since 1981

Free estimates

Warranties offered

"I have an old solar water heating unit that has a drip. I am considering replacing it with a tankless. Albert Nahman Plubming does not work on this type of water heating unit, and only offered to take it down and replace it. Since this may not be the best solution for me, I had to find another provider. Getting some guidance would have been helpful, rather than just offering to remove it.
"
Living room Mini-Split
Aquasana home Filtration
Almost no disturbance at EBMUD meter
Navien with filtration to protect the heat exchanger
New house valve and Pressure Reducing Valve

+73

Response time8 hrs
Response rate100%
44 neighbors recently requested a quote
Avatar for McCormick Home Builders, Inc.
McCormick Home Builders, Inc.
4.7(
42
)
Solar Panel InstallSolar Panels For Electric System - Install - For BusinessSolar Water Heater System - Install+3 more

Serving Castro Valley, CA and surrounding areas

Approved

In business since 2017

Free estimates

Customers say: True professional

MCCORMICK HOME BUILDERS INC We're a locally owned and operated company that values honesty and integrity and treats your home or business as if it were our own. We are experts in all aspects of roofing projects and our services are customizable to each individual project. We specialize in both installations and replacements. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guarantee your satisfaction! \n \n

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+1

Response time6 hrs
Recommended by17%of homeowners
Avatar for Sunrun Inc
Sunrun Inc
5.0(
1
)
Solar Panel Install

Serving Castro Valley, CA and surrounding areas

Approved

In business since 2007

Free estimates

Emergency services offered

"The #1 home solar & battery company in America. We know going solar can be complicated. We are here as your expert guide every step of the way. With our customers, we are creating a planet run by the sun. Unrivaled home solar and battery experience \nWith 900,000 homes and counting, no one has more installation expertise.Smart technology \nAn ecosystem of innovative products that put you in control of your home energy needs. Payment solutions for every home \nTailored plans including predictable monthly payments, little-to-no money down, and no-debt options. The Sunrun Guarantee \nThe industry's most comprehensive repairs, maintenance & monitoring program. \n"

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Solar Panels FAQs, answered by experts

A few disadvantages of installing solar panels on your roof include the high up-front costs and the potential for increased property taxes. Installing solar panels can increase the home’s value, which in turn can mean higher taxes. Depending on your area, you should check with your local tax offices for more information. Another potential pitfall is roof leaks from a poor installation, but this shouldn’t be an issue if you hire a reputable company.

Yes, you should tell your home insurance company about your solar panels. Even if you believe they’re covered by your existing policy, installing a solar panel system is a significant change to your home. This can affect coverage and premiums. By discussing your new solar panel installation with your insurance provider, you can be sure you have enough coverage and that the policy completely covers the panels against damage.

Not all homes are suited for solar panel systems. Older roofs or those in poor condition may need repairs or replacement before solar panels can be installed. Some other factors to consider are the amount of sunlight your roof receives, the roof’s orientation and pitch, and any shading from nearby trees or buildings.

Solar panels can pay for themselves in five to 15 years, depending on the cost of your system, how much energy it generates, whether you qualify for incentives or power buybacks, and the price of energy in your area. Solar panels pay for themselves over time as they lower electricity bills, so it will take time to recoup your initial investment. However, the longer you have your system, the more money you can save and earn.

Yes, going solar really saves money. In fact, according to some calculations, the average homeowner who switches from electric to solar power will save almost $2,000 a year on energy costs. While buying solar panels and switching to solar can be costly up front, the savings add up over time. If you can sell back extra energy or take advantage of tax incentives, your savings can be even higher.

The Castro Valley, CA homeowners’ guide to solar panel services

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