15 Best Solar Companies in Westmont, CA (2025 Reviews)
We analyzed over 1500 solar companies in the nation,
and have selected the top 15 in Westmont based on:
Customer review scores
Service area for Westmont, CA
Company policies and services offered
Accreditations and certifications
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Average Westmont homeowner saves $2,318/year with solar panels
Why you can trust EcoWatch
Best Solar Companies in Westmont
On the hunt for the top solar companies in Westmont? Installing solar panels is an exciting venture that many homeowners find rewarding for their wallets, communities and the planet. Due to Westmont's very high level of sunshine on average, it's long been on the leading edge of solar energy.
If you’re planning on going solar, the first step to take is to find the best solar companies in Westmont and compare quotes. The good news is we did the hard work and compiled a list of the best solar companies to make it easier on you.To get free quotes from the best solar companies in Westmont, you can click "get quote" below.
Best Regional Coverage
Momentum Solar
- Great warranty coverage
- Representatives are experts on local policies
- Concierge service ensures steady communication
- Slightly limited service offerings
Best for Leasing
Sunrun
- 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 Westmont

SunPower by Sun Solar-OC
Reliable Customer Support
Limited information available on website
Services Offered
Panel Installation
Consultation
Cleaning and Maintenance
Battery Storage


ProSolar California
Reliable Customer Support
Informative Resources
Free Quotes
Limited information available on website
Services Offered
Battery Storage
Panel Installation
Tesla Powerwall
Financing Assistance

Powerfull Solar, Inc
Free Quotes
Prompt Service Delivery
Informative Resources
Reliable Customer Support
Limited information available on website
Services Offered
Consultation
Cleaning and Maintenance
Panel Installation
Financing Assistance
Solar Carports
Permit Assistance



Solar Source
Free Quotes
Family-Operated Business
Clear Pricing Policy
Informative Resources
Reliable Customer Support
Limited information available on website
Services Offered
Panel Installation
Financing Assistance
Permit Assistance

AmeriGreen Solar
Free Quotes
Reliable Customer Support
Prompt Service Delivery
Clear Pricing Policy
Limited information available on website
Services Offered
Panel Installation
Financing Assistance
Consultation

Altadena Energy & Solar
Clear Pricing Policy
Reliable Customer Support
Informative Resources
Free Quotes
Limited information available on website
Services Offered
Battery Storage
Panel Installation
Permit Assistance

Imperial Solar
Free Quotes
Informative Resources
Reliable Customer Support
Limited information available on website
Services Offered
Panel Installation
Consultation
Battery Storage
Grid-Tied Solar System


REPOWER OC
Free Quotes
Clear Pricing Policy
Reliable Customer Support
Prompt Service Delivery
Informative Resources
Limited information available on website
Services Offered
Panel Installation
Financing Assistance

SunSolar U.S.
Clear Pricing Policy
Informative Resources
Reliable Customer Support
Free Quotes
Prompt Service Delivery
Limited information available on website
Services Offered
Panel Installation
Solar Carports
Permit Assistance
Battery Storage
Consultation
Financing Assistance


CERVUS Solar & Construction
Prompt Service Delivery
Free Quotes
Reliable Customer Support
Informative Resources
Clear Pricing Policy
Limited information available on website
Services Offered
Panel Installation
Battery Storage
Skilled Repairs
Financing Assistance
Cleaning and Maintenance
Consultation
Methodology: How We Ranked the Best Solar Companies in Westmont
EcoWatch's solar experts analyzed each solar company in Westmont 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 Westmont
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 Westmont
The cost of installing solar panels has decreased significantly over the past several years, but it’s still a large investment for most homeowners.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:
- How much sunlight your roof gets: If your roof gets limited direct sunlight, your solar panel system won’t be able to produce as much energy, which will give you lower savings on energy bills than a roof that gets a lot of sunlight.
- 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 lets you deduct from your taxes a percentage of the project cost. You can also save money on your utility bills, which can generate an average of $28,000 of savings over 20 years.
- The type of solar panels you’re thinking of getting: More efficient models are more highly priced, so that will shape your budget for your solar project.
- Electricity consumption: The average home in Westmont doesn’t use much energy, and consequently may not see as many savings on their power bills.
So is buying solar panels worth it? Whether you hope to lower your electricity costs, greenhouse gas emissions or both, solar panels are a good investment for many Westmont homeowners.
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Solar Incentives in Westmont
In order to increase the number of homes and businesses that use solar power, federal, state and local governments – and even some utility companies – offer incentives to help make solar more economically viable and accessible.Everyone can take advantage of the federal Solar Investment Tax Credit (ITC), which allows you to claim 0 of how much you paid for your solar installation on your tax return, reducing the amount of taxes you owe that year. In addition, there may be some state and city incentives that can save you some extra money too. In our article on solar incentives, you can read about the incentives you qualify for in Westmont.
Environmental Impact of Switching to Solar in Westmont
Lots of people want to do what they can for the environment, which in many cases is the chief reason for installing solar panels.But you may be wondering – how much exactly can you help the environment by using solar power? The average person has a rather large carbon footprint. Between their car, which is responsible for over 10,000 pounds of carbon dioxide emissions each year, and electricity for their home, it can be overwhelming to figure out what to do. Going solar is a simple thing you can do to help.Since solar panels don’t release carbon dioxide emissions into the atmosphere when producing electricity, they’re a good trade for traditional energy sources. In fact, you could lower your carbon dioxide emissions by about 50 pounds each year. Since solar energy is plentiful and generates electricity without releasing carbon emissions, making the switch to solar power is one easy step you can take to help preserve the environment.
Best Regional Coverage
Momentum Solar
- Great warranty coverage
- Representatives are experts on local policies
- Concierge service ensures steady communication
- Slightly limited service offerings
Best for Leasing
Sunrun
- Expansive service area
- Many financing options
- Some reported issues with customer service
- Some reported issues with door-to-door sales
EcoWatch's Westmont, CA Solar Company Rankings FAQs
Which solar company is the best in Westmont?
In Westmont, SunPower by Sun Solar-OC is the most reputable local solar company. Our team of experts rates it 3.00 stars, so it's a great choice if you're planning on installing solar panels on your home.
Are solar panels really good for the environment?
Solar panels can be harmful for the environment when manufacturers use toxic chemicals in the construction. Chemicals can make solar panels difficult to dispose of safely once they’ve reached the end of their lifespan. Making solar panels uses a lot of energy as well. The energy payback period is about 1 to 4 years.
How long does it take to see a return on your investment after buying solar panels?
Solar panels usually pay for themselves in about 8.4 years, but your solar payback period will depend on your utility costs. The higher your typical electricity bill, the faster your solar panel system will pay for itself.
What is the best kind of solar panel?
There are three main types of solar panels: monocrystalline, polycrystalline and thin-film. In terms of efficiency and price, monocrystalline has the highest for both, then polycrystalline, and then thin-film. The best choice for you is highly influenced by the layout of your roof, your budget and how much efficiency you're looking for.
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.