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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

"Roberto Sanchez Solar System, I interviewed 4 solar panel companies and I chose NRG because Will was able to explain everything well. He answered all my questions to my complete satisfaction. Friendly and honest, Will made the sales process very smooth and personable. Tiffany helped and coordinated the project to make sure everything goes well. She always got back to my emails and phone calls promptly. Installers completed the solar panels when I was at work. Came home and he solar panels were on the roof. Definitely a nice install and quality work was delivered. Lisa helped out with the financing on the HVAC. She was patient and I believe got me a lower amount that before. Solar edge app is great to use and straight forward. Highly recommended company thanks NRG. I am excited to use my new solar system!"
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

"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..."
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 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

Yes, a solar panel can power a TV without a battery, but only if the sun is shining and the panel is generating enough energy. Your solar panel and TV must have the same voltage, and you should install a charge controller and inverter between them so power surges don’t destroy your TV. To watch TV at night, in the early morning and late afternoon, and on cloudy days, your home must be tied to the power grid.

Learn about common solar blockers in your area to determine how often you should wash solar panels and the best cleaning method:

  • Soot: If you have a fireplace, soot can disperse and accumulate on the solar panels.

  • Debris, dirt, and leaves: These natural elements require light cleaning. Being close to trees or living in a desert area can cause more of these to accumulate.

  • Pollen: Areas with a high pollen count require more frequent solar panel cleaning, and sticky plant material requires a deeper cleaning.

  • Bird droppings: Bird droppings are binding and more difficult to remove. Keep this in mind if you live near a lot of surrounding trees. 

Installing solar panels is worth it if you’re frustrated with paying high utility bills, live in a sunny location, and qualify for tax credits and incentives. Most homeowners cut between $650 and $1,500 from their utility bills each year by installing solar panels. Over the course of your panel’s warranty, you could save anywhere from $16,300 to $37,500, though those in sunny areas with high energy costs could save more than $100,000.

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.

In most cases, solar panels are covered by homeowners insurance because they are considered a permanently attached part of the home, and you may not need additional coverage. However, it is essential to read the fine print of your specific policy to understand the extent of the coverage, as some policies might only cover certain types of damage, such as hail. Always check with your insurance provider before installing solar panels to ensure your policy provides adequate coverage for your investment.

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.