15 Best Solar Companies in Walnut, CA (2023 Reviews)

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

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

Average Walnut homeowner saves $2,108/year with solar panels

By EcoWatch Local Advisors

Data Analysis: James Savino

Ranking Methodology: Karsten Neumeister

Updated September 15, 2023

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 Walnut

Choosing the best solar panel installation company for your home is an important decision, but it's one that can pay off big in Walnut. After 20 years of offsetting your energy costs with a solar system, you can save about $25,000 on your electricity bills.

In this article, we'll tell you about the top Walnut solar installers so you can find the best one for your home's solar energy needs. We suggest shopping around for multiple quotes and comparing them to find the best installer for your home. To get free, no-pressure quotes from the best solar installers in Walnut, click the link below.

Best National Provider

SunPower

★★★★★
5.0

  • Most efficient panels on the market
  • National coverage
  • Cradle to Cradle sustainability certification
  • Great warranty coverage
  • Expensive
  • Customer service varies by local dealer

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 Warranty Coverage

ADT Solar

★★★★★
4.0

  • Industry-leading warranty coverage
  • Expansive service area
  • Some reported communication issues
  • No leases or PPAs

EcoWatch Rankings for Solar Companies in Walnut

Best Local Installer
ecowatch badge icon

EcoWatch Rating

4.4/5

SunPower by Sun Solar-OC

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

Services Offered

  • Service icon Expert panel installation
  • Service icon Tailored solutions
  • Service icon Energy storage solutions
  • Service icon Business installations
  • Service icon Home installations

Website: https://sunpowerbysunsolaroc.com/
Address: 4085 E La Palma Ave Suite B, Anaheim, CA 92807
Phone: 9497349695
Outstanding Local Installer
ecowatch badge icon

EcoWatch Rating

3.0/5

SunPower by True Power 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 Home installations
  • Service icon Energy storage solutions
  • Service icon Business installations
  • Service icon Tailored solutions
  • Service icon Integrated roofing
  • Service icon Expert panel installation

Website: http://www.truepowersolar.com/
Address: 201 Clark Ave, Pomona, CA 91767
Phone: 7146768888
Outstanding Local Installer
ecowatch badge icon

EcoWatch Rating

3.0/5

Los Angeles Solar Pros

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

Services Offered

  • Service icon Home installations
  • Service icon Business installations
  • Service icon Expert panel installation
  • Service icon Energy storage solutions
  • Service icon Integrated roofing
  • Service icon Tailored solutions

Website: http://www.lasolarpros.com/
Address: 7807 Telegraph Rd, STE K-L, STE K-L, CA 90640
Phone: 3237651040
Outstanding Local Installer
ecowatch badge icon

EcoWatch Rating

3.0/5

Simple Solar Energy Solutions

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

Services Offered

  • Service icon Home installations
  • Service icon Expert panel installation
  • Service icon Energy storage solutions
  • Service icon Integrated roofing
  • Service icon Tailored solutions

Website: http://www.simplesolares.com/
Address: 7755 Center Dr Ste. 1100, Huntington Beach, CA 92647
Phone: 8448576527
Outstanding Local Installer
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EcoWatch Rating

4.2/5

Sun Synergy Consulting, Inc. SunPower Authorized Company.

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

Services Offered

  • Service icon Energy storage solutions
  • Service icon Home installations
  • Service icon Tailored solutions
  • Service icon Expert panel installation

Website: http://sunsynergyinc.com/
Address: 200 Spectrum Center Dr STE 300, Irvine, CA 92618
Phone: 9514288382
Outstanding Local Installer
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EcoWatch Rating

4.9/5

Los Angeles Solar

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

Services Offered

  • Service icon Tailored solutions
  • Service icon Expert panel installation

Website: http://los-angeles-solar.business.site/
Address: 14807 Aetna St, Van Nuys, CA 91411
Phone: 8188733302
Outstanding Local Installer
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EcoWatch Rating

3.0/5

Levion Solar

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

Services Offered

  • Service icon Tailored solutions
  • Service icon Home installations
  • Service icon Expert panel installation

Website: https://levionsolar.com/contact
Address: 2020 Iowa Ave, Riverside, CA 92507
Phone: 9515542202
Outstanding Local Installer
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EcoWatch Rating

5.0/5

Solar My Home Chino

  • 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 Integrated roofing
  • Service icon Home installations
  • Service icon Skilled repairs
  • Service icon Expert panel installation
  • Service icon Energy storage solutions
  • Service icon Business installations

Website: https://solarmyhomechino.com/
Address: 5181 6th St, Chino, CA 91710
Phone: 9097745065
Outstanding Local Installer
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EcoWatch Rating

5.0/5

Sustainable Electric Solutions, Inc

  • 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 Expert panel installation
  • Service icon Home installations
  • Service icon Tailored solutions
  • Service icon Business installations
  • Service icon Energy storage solutions

Website: http://www.drivingthefuture.com/
Address: 308 W Monterey Ave, Pomona, CA 91768
Phone: 8005242970
Outstanding Local Installer
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EcoWatch Rating

4.9/5

West Covina Solar

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

Services Offered

  • Service icon Expert panel installation
  • Service icon Home installations
  • Service icon Tailored solutions

Website: http://westcovinasolar.com/
Address: 1338 Center Ct Dr #109, Covina, CA 91724
Phone: 6266065338
Outstanding Local Installer
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EcoWatch Rating

4.9/5

Palm Coast Solar Cleaning

  • 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 Energy storage solutions
  • Service icon Expert panel installation
  • Service icon Home installations
  • Service icon Business installations
  • Service icon Tailored solutions
  • Service icon Integrated roofing

Website: http://www.palmcoastsolarcleaning.com/
Address: 902 N Azusa Ave, Azusa, CA 91702
Phone: 6262145477
Outstanding Local Installer
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EcoWatch Rating

4.9/5

SoCal Solar Panel Cleaning Company

  • 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 Business installations
  • Service icon Tailored solutions
  • Service icon Energy storage solutions
  • Service icon Home installations
  • Service icon Integrated roofing

Website: https://socalsolarpanelwashing.com/
Address: 2552 Foothill Blvd APT 322, La Verne, CA 91750
Phone: 9095521381
Outstanding Local Installer
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EcoWatch Rating

4.9/5

SolarMax Technology

  • 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 Business installations
  • Service icon Home installations
  • Service icon Tailored solutions
  • Service icon Integrated roofing
  • Service icon Expert panel installation
  • Service icon Energy storage solutions
  • Service icon End-to-end services

Website: https://www.solarmaxtech.com/
Address: 3230 Fallow Field Dr, Diamond Bar, CA 91765
Phone: 9092459952
Outstanding Local Installer
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EcoWatch Rating

4.9/5

SunGuide Solar Inc

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

Services Offered

  • Service icon Tailored solutions
  • Service icon Home installations
  • Service icon Expert panel installation
  • Service icon Energy storage solutions

Website: http://www.mysunguide.com/
Address: 1057 E Imperial Hwy #307, Placentia, CA 92870
Phone: 6269414181
Outstanding Local Installer
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EcoWatch Rating

4.7/5

All In One Roofing And Solar

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

Services Offered

  • Service icon Integrated roofing
  • Service icon Home installations
  • Service icon Tailored solutions
  • Service icon Expert panel installation
  • Service icon Business installations
  • Service icon Skilled repairs

Website: http://www.allinoneteam.com/
Address: 680 N Berry St # A, Brea, CA 92821
Phone: 7144763304

Methodology: How We Ranked the Best Solar Companies in Walnut

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


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 Walnut

Even though solar panels can save you a good amount of money on energy bills over time, it's necessary to know the upfront costs. Some key factors that affect the cost of installing a solar panel system on your home and how much it could save you over time are:

  • The amount of sunlight your rooftop gets: Thanks to Walnut's very high amount of average daily sunlight, you should be able to save a lot on your power bills.
  • Your current energy bills: Solar panels can substantially decrease, or entirely eliminate, your utility bills. In Walnut, you can save an average of $63 a month.
  • Incentives: Something that can reduce the cost of 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 a decent amount of money on your utility bills, which can lead to an average of $25,000 of savings over 20 years.
  • System size and type: Some models are more costly than others, so the one you get can raise or lower your initial investment. Plus, the more solar panels you need, the more it'll cost.

Thanks to the cost of solar panels being lower than before as well as various solar incentives, they are a worthwhile investment for many homeowners.

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Solar Incentives in Walnut

If you're considering switching to solar energy, a variety of government incentives and tax credits can dramatically bring down the cost of the project and expedite the return on your investment. These incentives normally consist of cash rebates, tax breaks and/or solar renewable energy credits. They can cut the cost of going solar by 30%, upwards of 50% in some cases. In our article on solar incentives, you can see the incentives you qualify for near you.

Environmental Impact of Switching to Solar in Walnut

There are a few important reasons why many people are considering solar energy: to help their wallet and the environment. Many homeowners might be wondering how much exactly they can impact the environment by switching to solar in Walnut, though. In a place like Walnut where commute times can be very long, going solar can help help reduce the carbon footprint of driving a lot. In fact, if you adopt solar power, you could reduce your carbon dioxide emissions by about 50 pounds each year. As you can see, using solar power has so many other rewards apart from saving money. One of the most important ones is that you can help save the planet too.

Best National Provider

SunPower

★★★★★
5.0

  • Most efficient panels on the market
  • National coverage
  • Cradle to Cradle sustainability certification
  • Great warranty coverage
  • Expensive
  • Customer service varies by local dealer

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 Warranty Coverage

ADT Solar

★★★★★
4.0

  • Industry-leading warranty coverage
  • Expansive service area
  • Some reported communication issues
  • No leases or PPAs

EcoWatch's Walnut, CA Solar Company Rankings FAQs

Which solar company is the best in Walnut?

The highest-rated local solar company in Walnut is REPOWER OC, with a rating of 4.01 stars.

What are some of the advantages and disadvantages of installing solar panels?

A few of the biggest pros are that it reduces your power bills, it's environmentally friendly, and it provides a significant return on your investment (ROI). The most notable cons are that solar panels don't work as well when there's limited direct sunlight, the installation cost is pricey and solar panels aren't always aesthetically pleasing.

Is it worth installing solar panels on my house?

Solar panels can be a fruitful investment for many homeowners, but truthfully, they might not be worth it for everyone. If your home doesn't get a lot of direct sunlight or your electricity bills are already pretty low, solar panels might not be for you.

When is the best time of year to install solar panels?

Although summer is the most popular time people install solar panels, the best time is actually winter. You can save money since there's decreased demand during the winter months, and it lets you be up and running with solar for the more expensive power bills you may get during the summer.

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.