15 Best Solar Companies in Fairfax, CA (2025 Reviews)

We analyzed over 1500 solar companies in the nation,
and have selected the top 15 in Fairfax based on:

  • Customer review scores
  • Service area for Fairfax, CA
  • Company policies and services offered
  • Accreditations and certifications

Average Fairfax homeowner saves $2,674/year with solar panels

By EcoWatch Local Advisors

Data Analysis: James Savino

Updated January 24, 2025

Why you can trust EcoWatch

We work with a panel of solar experts to create unbiased reviews that empower you to make the right choice for your home. No other site has covered renewables as long as us, which means we have more data and insider information than other sites. Our rankings are never affected by revenue or partnerships.

Best Solar Companies in Fairfax

If you’re a homeowner looking to capitalize on the solar incentives in Fairfax, it can be difficult to narrow down which company to go with. But, the hard work is worth it since adopting solar energy is typically a good choice. Because solar panels generate their own electrical power, they can greatly bring down your electricity bill each month, if not entirely eliminate it. In fact, you could look forward to about $32,000 of savings over 20 years.


In this article, we’ll introduce you to the top Fairfax solar installers so you can find the best one for your home’s renewable energy needs.To get an idea of what it would cost to put solar panels on your roof, you can click the button below to get a quote from a certified installer near you.

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EcoWatch Rankings for Solar Companies in Fairfax

Best Local Installer
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EcoWatch Rating

5.0/5

Pac Solar Corporation

  • Pros icon Free Quotes
  • Pros icon Informative Resources
  • Con icon Limited information available on website

Services Offered

  • Service icon Panel Installation
  • Service icon Battery Storage

Website: http://pacsolar.com/
Address: 118 Mitchell Blvd, San Rafael, CA 94903
Phone: 4152998989
Outstanding Local Installer
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EcoWatch Rating

5.0/5

Amy's Roofing and Solar

  • Pros icon Informative Resources
  • Pros icon Clear Pricing Policy
  • Pros icon Free Quotes
  • Pros icon Reliable Customer Support
  • Con icon Limited information available on website

Services Offered

  • Service icon Tesla Powerwall
  • Service icon Cleaning and Maintenance
  • Service icon Solar Panel Upgrades
  • Service icon Solar Carports
  • Service icon Panel Installation
  • Service icon Battery Storage
  • Service icon Financing Assistance
  • Service icon Skilled Repairs

Website: https://www.amyrs.com/
Address: 320 Jewett Rd, Petaluma, CA 94952
Phone: 7079819801
Outstanding Local Installer
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EcoWatch Rating

5.0/5

Bella Hem Solar, Inc.

  • Pros icon Informative Resources
  • Pros icon Reliable Customer Support
  • Pros icon Free Quotes
  • Pros icon Prompt Service Delivery
  • Pros icon Clear Pricing Policy
  • Con icon Limited information available on website

Services Offered

  • Service icon Permit Assistance
  • Service icon Panel Installation
  • Service icon Skilled Repairs
  • Service icon Cleaning and Maintenance
  • Service icon Consultation
  • Service icon Battery Storage

Website: http://www.bellahem.com/
Address: 7556 Windward Dr, Rohnert Park, CA 94928
Phone: 5106290790
Outstanding Local Installer
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EcoWatch Rating

5.0/5

Source Energy

  • Pros icon Reliable Customer Support
  • Pros icon Clear Pricing Policy
  • Pros icon Free Quotes
  • Con icon Limited information available on website

Services Offered

  • Service icon Financing Assistance
  • Service icon Consultation
  • Service icon Panel Installation

Website: https://sourcenergy.solar/
Address: 161 N Civic Dr #400, Walnut Creek, CA 94596
Phone: 9253196634
Outstanding Local Installer
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EcoWatch Rating

5.0/5

Taylor Energy Solar & Batteries

  • Pros icon Reliable Customer Support
  • Pros icon Informative Resources
  • Con icon Limited information available on website

Services Offered

  • Service icon Panel Installation
  • Service icon Tesla Powerwall
  • Service icon Battery Storage

Website: https://www.taylor-energy.com/
Address: 612 Petaluma Ave, Sebastopol, CA 95472
Phone: 7076201367
Outstanding Local Installer
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EcoWatch Rating

5.0/5

Solar Bill Review

  • Pros icon Free Quotes
  • Pros icon Informative Resources
  • Pros icon Prompt Service Delivery
  • Pros icon Reliable Customer Support
  • Con icon Limited information available on website

Services Offered

  • Service icon Consultation
  • Service icon Skilled Repairs
  • Service icon Panel Installation
  • Service icon Battery Storage

Website: https://solarbillreview.com/
Address: 11501 Dublin Blvd STE 200, Dublin, CA 94568
Phone: 9258332641
Outstanding Local Installer
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EcoWatch Rating

5.0/5

Kingdom Solar

  • Pros icon Clear Pricing Policy
  • Pros icon Free Quotes
  • Con icon Limited information available on website

Services Offered

  • Service icon Cleaning and Maintenance
  • Service icon System Decommissioning
  • Service icon Panel Installation
  • Service icon Permit Assistance
  • Service icon Battery Storage
  • Service icon Skilled Repairs

Website: http://www.kingdomsolar.com/
Address: 2388 Research Dr, Livermore, CA 94550
Phone: 9254818903
Outstanding Local Installer
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EcoWatch Rating

5.0/5

TN Electrical and Solar Services

  • Pros icon Free Quotes
  • Pros icon Informative Resources
  • Pros icon Reliable Customer Support
  • Pros icon Clear Pricing Policy
  • Con icon Limited information available on website

Services Offered

  • Service icon Cleaning and Maintenance
  • Service icon Consultation
  • Service icon Grid-Tied Solar System
  • Service icon Battery Storage
  • Service icon Panel Installation
  • Service icon Solar Panel Upgrades

Website: http://www.tnsolars.com/
Address: 1150 Murphy Ave #240, San Jose, CA 95131
Phone: 4082293632
Outstanding Local Installer
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EcoWatch Rating

4.9/5

Got Watts?

  • Pros icon Informative Resources
  • Pros icon Clear Pricing Policy
  • Pros icon Reliable Customer Support
  • Pros icon Prompt Service Delivery
  • Con icon Limited information available on website

Services Offered

  • Service icon Panel Installation
  • Service icon Financing Assistance
  • Service icon Skilled Repairs
  • Service icon Cleaning and Maintenance
  • Service icon Battery Storage
  • Service icon Permit Assistance
  • Service icon Solar Panel Upgrades

Website: https://www.gotwatts.com/
Address: 2045 Commerce Ave, Concord, CA 94520
Phone: 9254210411
Outstanding Local Installer
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EcoWatch Rating

4.9/5

Northern Pacific Power Systems

  • Pros icon Free Quotes
  • Pros icon Informative Resources
  • Con icon Limited information available on website

Services Offered

  • Service icon Grid-Tied Solar System
  • Service icon Panel Installation
  • Service icon Financing Assistance
  • Service icon Permit Assistance
  • Service icon Solar Panel Upgrades
  • Service icon Battery Storage
  • Service icon Cleaning and Maintenance

Website: https://www.northernpacificpower.com/
Address: 5580 Skylane Blvd Suite B, Santa Rosa, CA 95403
Phone: 7075287652
Outstanding Local Installer
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EcoWatch Rating

4.9/5

Ambrose Solar

  • Pros icon Clear Pricing Policy
  • Pros icon Free Quotes
  • Pros icon Informative Resources
  • Pros icon Reliable Customer Support
  • Con icon Limited information available on website

Services Offered

  • Service icon Financing Assistance
  • Service icon Cleaning and Maintenance
  • Service icon Panel Installation
  • Service icon Permit Assistance
  • Service icon Battery Storage

Website: http://www.ambrosesolar.com/
Address: 820 Eubanks Dr Suite A, Vacaville, CA 95688
Phone: 7079998036
Outstanding Local Installer
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EcoWatch Rating

4.9/5

United Solar Electric

  • Pros icon Informative Resources
  • Pros icon Free Quotes
  • Con icon Limited information available on website

Services Offered

  • Service icon Consultation
  • Service icon Panel Installation
  • Service icon Financing Assistance
  • Service icon Battery Storage

Website: https://www.unitedsolarelectric.net/
Address: 4501 O'Hara Ave, Brentwood, CA 94513
Phone: 9256794665
Outstanding Local Installer
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EcoWatch Rating

4.9/5

Infinium Solar, Inc.

  • Pros icon Reliable Customer Support
  • Pros icon Informative Resources
  • Pros icon Prompt Service Delivery
  • Pros icon Clear Pricing Policy
  • Pros icon Free Quotes
  • Con icon Limited information available on website

Services Offered

  • Service icon Financing Assistance
  • Service icon Panel Installation
  • Service icon System Decommissioning
  • Service icon Solar Carports
  • Service icon Battery Storage

Website: https://www.infiniumsolar.com/
Address: 1190 Dell Ave ste o, Campbell, CA 95008
Phone: 4085838101
Outstanding Local Installer
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EcoWatch Rating

4.8/5

Bay Valley Solar Roofing

  • Pros icon Free Quotes
  • Pros icon Informative Resources
  • Pros icon Reliable Customer Support
  • Pros icon Clear Pricing Policy
  • Con icon Limited information available on website

Services Offered

  • Service icon Financing Assistance
  • Service icon Battery Storage
  • Service icon Panel Installation
  • Service icon Skilled Repairs

Website: https://www.bayvalleyroofing.com/
Address: 1820 Arnold Industrial Way Ste A, Concord, CA 94520
Phone: 9254286614
Outstanding Local Installer
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EcoWatch Rating

4.8/5

VITAL ENERGY SOLUTIONS

  • Pros icon Free Quotes
  • Pros icon Informative Resources
  • Pros icon Prompt Service Delivery
  • Pros icon Reliable Customer Support
  • Con icon Limited information available on website

Services Offered

  • Service icon Permit Assistance
  • Service icon Panel Installation
  • Service icon Consultation
  • Service icon Financing Assistance
  • Service icon Battery Storage

Website: http://www.vitalenergysolar.com/
Address: 7064 Corline Ct Building B, Sebastopol, CA 95472
Phone: 7078003884

Methodology: How We Ranked the Best Solar Companies in Fairfax

EcoWatch's solar experts analyzed each solar company in Fairfax based on criteria such as its reputation in the industry, customer reviews, services, warranty coverage and financing. Using this solar methodology, we used the data we collected to rate and rank each company and narrow down our picks for the best solar companies in Fairfax


Below are some the criteria we examined specifically for California solar companies

  • Brand reputation and certifications (20%): We take each company's Better Business Bureau (BBB) score into consideration, as well as how long the installer has been in business (at least 5 years is required, 10 preferred) and what type of solar certifications it holds.
  • Customer reviews (20%): Trust is a top priority at EcoWatch, so we take customer experience under close consideration. We scour different review sites and customer testimonials when ranking our top solar companies, checking sites such as Trustpilot and Google Reviews. We also consider any potential complaints or lawsuits filed against these companies and award or remove points accordingly.
  • Warranty (20%): A company earns a perfect score in this category if it offers 25-year warranties that cover performance, product and workmanship. The industry standard that we measure companies against is 25-year product and performance warranties, along with a 10-year workmanship warranty. We also look closely into the track record of the post-installation support each company provides in terms of honoring its contracts
  • Solar services (10%): All of the companies we review install solar panels, but we award companies higher points if they offer additional services for customers, like battery installation, energy-efficiency audits, and EV chargers.
  • Pricing and financing (10%): It's hard to get exact quotes for solar projects, but we use marketplace research to determine how each company prices its equipment and installation services. Additionally, companies that offer more help for panel financing — like in-house loans, leases, or PPAs — score higher than those that don't.
  • Availability (10%): The bigger the service area, the higher the company will score.
  • Transparency and accessibility (5%): Solar installers that offer free consultations and easy contact methods score higher in this category.
  • Environmental, social and corporate governance factors (5%): A company earns a perfect score in this category if it offers public data disclosure, addresses end-of-life (EOL) products or processes, and demonstrates a commitment to uplifting the communities that it serves.

The Cost and Benefits of Solar in Fairfax

Solar panels are powered by a free energy source — the sun — but before you can take advantage of this you will first need to pay to install your system.The installation cost is just one important factor you should keep in mind when looking into installing solar panels. How much it'll cost and how much you can save depend on things such as:

  • Your income and budget: This determines what kind of solar panels you can get.
  • Incentives: One thing that can save you money on your solar project is the solar investment tax credit (ITC), which is a tax credit that’s equal to a percentage of the project cost. You can also save a decent amount of money on your utility bills, which can result in an average of $32,000 of savings over 20 years.
  • Average daily sunlight: Since Fairfax gets lots of sunlight, your solar panel system will most likely be able to generate enough energy to power your whole home, which affects how much your electricity bills will be.
  • Electricity consumption: The average household in Fairfax doesn’t use much energy, and consequently may not see as many savings on their power bills.

There are many wonderful benefits of solar in spite of the upfront cost of installation. It can help the environment and your wallet. In addition, it can raise the value of your home, leading to even more benefits if you decide to sell your home later.

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Solar Incentives in Fairfax

One of the great things about installing a solar panel system is earning federal and potentially state incentives.When you install solar panels, you can claim the federal tax credit, or ITC. This credit currently reduces your tax bill by 0 of the cost of your solar panels. Plus, there are often some state and city incentives that you can take advantage of to further cut back on the cost of solar of solar panels. For more information about incentives that apply to you, check out our article on solar incentives.

Environmental Impact of Switching to Solar in Fairfax

Replacing nonrenewable energy with solar power is a profound way to do what you can for a more sustainable future.Many homeowners might be wondering how much exactly they can impact the environment by switching to solar in Fairfax, though. In a city like Fairfax where commute times can be very long, installing solar panels can help help reduce the carbon footprint of driving a lot.While making solar panels emits carbon dioxide, the panels make up for it by greatly lowering the amount of CO2 you would have produced if you still used traditional energy. In Fairfax, you can reduce your carbon footprint by 50 pounds a year with solar panels. For homeowners who are worried about the environment, the upfront cost of solar is a small price to pay for the offset carbon emissions.

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EcoWatch's Fairfax, CA Solar Company Rankings FAQs

Which solar installation company is the best near me?

In Fairfax, Pac Solar Corporation is the most reputable local solar company. Our team of experts rates it 5.00 stars, so it's a good choice if you're planning to add solar panels to your house.

What are the pros and cons of solar power?

The greatest advantages of solar power are that it can lower or, in some cases, totally eradicate your electricity bills, improve the value of your home and bring down your carbon footprint. The biggest disadvantages are that solar panels can be pricey to install, you may not save a lot if you don’t use a lot of electricity and whether you can install solar panels depends on your roof configuration.

How long does it take for solar to pay for itself?

The average payback period for solar panel installation is about 7.3 years, but the exact period depends on local electricity costs, incentives and net metering programs.

How often do solar panels need to be replaced?

Though the average lifespan of solar panels is 25 to 30 years, that doesn't mean they are completely unusable. What this means is the amount of energy they produce will have decreased by about 0.8% each year since installing them. You can opt to replace them once you've had them for that long or you can keep using them at a lower efficiency after that time.

Our goal is to reach as many people as we can with sensible solutions like solar energy. Our team of full-time local researchers collects solar price and installation data for every city in America then compiles it to create these digestible city guides. If you want to read our solar expert’s opinion on the top solar companies featured here, follow this link.