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

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

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

Average Cupertino homeowner saves $2,577/year with solar panels

By EcoWatch Local Advisors

Data Analysis: James Savino

Ranking Methodology: Karsten Neumeister

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 Cupertino

Looking for energy freedom in Cupertino? Installing solar panels can be a rewarding course of action since you can enjoy lots of benefits after adopting solar power. It’s no surprise that Cupertino, somewhere with lots of sunlight, has tons of solar growth, so many of the best solar companies in the country have opened up there to help residents embrace renewable energy.


If you want to start making use of the great number of perks of solar, we’re here to help you narrow down your options to find the Cupertino solar installer that’s perfect for you.To get free quotes from the leading solar companies in Cupertino, click the "get quote" button below.

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Best Regional Coverage

Momentum Solar

★★★★★
4.5
  • Great warranty coverage
  • Representatives are experts on local policies
  • Concierge service ensures steady communication
  • Slightly limited service offerings

Best for Leasing

Sunrun

★★★★★
4.0
  • Expansive service area
  • Many financing options
  • Some reported issues with customer service
  • Some reported issues with door-to-door sales

EcoWatch Rankings for Solar Companies in Cupertino

Best Local Installer
ecowatch badge icon

EcoWatch Rating

4.5/5

SunPower

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

Services Offered

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

Website: https://us.sunpower.com/
Address: 880 Harbour Way S Suite 600, Richmond, CA 94804
Phone: 5105400550
Outstanding Local Installer
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EcoWatch Rating

3.0/5

SunPower by The Solar Quote

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

Services Offered

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

Website: http://www.sunpowerbythesolarquote.com/
Address: 2819 W March Ln #154, Stockton, CA 95219
Phone: 8889446765
Outstanding Local Installer
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EcoWatch Rating

5.0/5

TN Electrical and Solar Services

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

Services Offered

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

5.0/5

Solar Bill Review

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

Services Offered

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

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

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

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 Panel Installation
  • Service icon Consultation

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

Pac Solar Corporation

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

Services Offered

  • Service icon Battery Storage
  • Service icon Panel Installation

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

4.9/5

Infinium Solar, Inc.

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

Services Offered

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

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

4.9/5

Allterra Solar

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

Services Offered

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

Website: http://www.allterrasolar.com/
Address: 125-B McPherson St, Santa Cruz, CA 95060
Phone: 8314252608
Outstanding Local Installer
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EcoWatch Rating

4.9/5

Got Watts?

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

Services Offered

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

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

United Solar Electric

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

Services Offered

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

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

EcoWatch Rating

4.8/5

Highlight Solar

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

Services Offered

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

Website: https://www.highlightsolar.com/
Address: 1624 Remuda Ln, San Jose, CA 95112
Phone: 8669269997
Outstanding Local Installer
ecowatch badge icon

EcoWatch Rating

4.8/5

Sandbar Solar & Electric

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

Services Offered

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

Website: https://sandbarsc.com/
Address: 2656 Mission St, Santa Cruz, CA 95060
Phone: 8314698888
Outstanding Local Installer
ecowatch badge icon

EcoWatch Rating

4.8/5

Your Energy Solutions

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

Website: http://yourenergysolutions.com/
Address: 290 Rickenbacker Cir, Livermore, CA 94551
Phone: 8888880711
Outstanding Local Installer
ecowatch badge icon

EcoWatch Rating

4.8/5

NorthStar Solar Inc

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

Services Offered

  • Service icon Battery Storage
  • Service icon Panel Installation

Website: http://www.gonorthstarsolar.com/
Address: 822 Hartz Way STE 240, Danville, CA 94526
Phone: 9254007479

Methodology: How We Ranked the Best Solar Companies in Cupertino

EcoWatch's solar experts analyzed each solar company in Cupertino 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 Cupertino


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 Cupertino

Solar panels run off a free energy source — the sun — but before you can take advantage of this you will first need to pay to set up your panels.The cost and possible savings vary depending on some important factors such as:

  • The kind of solar panels you can purchase: This is dependent on your income and budget.
  • Incentives: Those who purchase and install a solar system this year can save 0 of their total solar spend by using the federal solar investment tax credit. You can also save about $31,000 on your energy bills over 20 years excluding incentives.
  • Average daily sunlight: Since Cupertino 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 you can save on your energy bills.
  • Energy consumption: Installing solar panels may be too steep of an option for homes that don’t consume a good amount of energy a month.

So is a solar panel system worth it? Whether you want to decrease your electric bills, carbon emissions or both, solar panels are a good investment for many Cupertino homeowners.

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Solar Incentives in Cupertino

Since solar power is better for the environment than burning fossil fuels, there are some government incentives available to encourage its adoption.There are several federal, state and local rebates and tax credits that let you earn a decent amount of money back after paying for solar panels. Take a look at our article on solar incentives to learn what incentives are available to you.

Environmental Impact of Switching to Solar in Cupertino

One of the best reasons to switch to solar power is to reduce your reliance on nonrenewable energy sources like burning fossil fuels, which are hazardous for the environment.Many homeowners might be wondering how much exactly they can impact the environment by switching to solar in Cupertino, though. One thing that can dramatically influence your carbon footprint is your commute time and how much you drive generally. If you install solar panels and drive an electric car, you can greatly cut back on your carbon dioxide emissions by charging your car at home.In Cupertino, the average homeowner can lower their carbon footprint by 50 pounds a year once they go solar. The great things about solar power are abundant — just like solar power is! That's why so many Cupertino residents have been happy with making the switch to solar.

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Best Regional Coverage

Momentum Solar

★★★★★
4.5
  • Great warranty coverage
  • Representatives are experts on local policies
  • Concierge service ensures steady communication
  • Slightly limited service offerings

Best for Leasing

Sunrun

★★★★★
4.0
  • Expansive service area
  • Many financing options
  • Some reported issues with customer service
  • Some reported issues with door-to-door sales

EcoWatch's Cupertino, CA Solar Company Rankings FAQs

What is the most reputable solar panel installer in Cupertino?

In Cupertino, SunPower is the best local solar company. Our team of experts rates it 4.50 stars, so it's a good choice if you're planning on installing solar panels on your house.

What are a few of the biggest advantages and disadvantages of installing solar panels?

The biggest advantages of solar power are that it can lower or, for some, 100% cut your electricity bills, improve the value of your home and cut back on your carbon footprint. The disadvantages are that solar panels can be costly 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.

Is it worth installing solar panels on my house?

Solar panels need a significant upfront investment that costs over ten thousand dollars, but whether or not solar panels are worth it depends on a variety of factors like the cost of electricity near you and how much direct sunlight your roof gets.

How efficient are solar panels?

Solar panel efficiency is the amount of energy from the sun that is converted into electricity. Most panels today have an efficiency rating of about 15 to 25%. If your panels are more efficient, you'll need fewer of them for your home's energy needs.

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.

Company research was conducted by Melissa Smith and Karsten Neumeister. Local data analysis was conducted by James Savino. See something we missed or could do better? Email the editor.