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Certasun

Certasun is a top-rated local company serving the Chicago and Milwaukee areas. We provide home solar, battery, and EV charger installations with integrity and professionalism. Here's what makes us different:

1. A GREAT CUSTOMER EXPERIENCE
You don’t need to believe us — just look at our reviews! You deserve a solar company that respects your time, intelligence, and home. We’re serious about making sure our customers feel like they’re getting the most care when they work with us. We are incredibly proud of our near perfect reviews on Google and SolarReviews.com. They tell us we’re doing something right.

2. WE DO EVERYTHING IN-HOUSE
It is not possible to guarantee a great customer experience when important parts of your project — such as sales, installation, or incentive processing — are handled by subcontractors.

3. OUR INTERESTS ARE ALIGNED WITH YOURS
We guarantee the energy production of your system over its lifetime. We also guarantee you’ll get the incentives you see in your installation agreement.

4. YOUR SYSTEM WILL LOOK GREAT
We don’t take installation shortcuts. Don’t assume all solar panel installations look the same — they don’t.

5. YOU DECIDE HOW TO PAY
We will advise you on available financing options, but won’t push you to use any one of them.

Learn more about us at certasun.com!
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4.8
Reviews
EnergySage Rating
4.8
EnergySage Reviews
EnergySage Rating
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Headquartered in Buffalo Grove, Illinois, Certasun strives to be the best local solar company serving northeast Illinois and southeast Wisconsin. We want you to feel confident and excited about going solar. Whether your goal is to save money, reduce your reliance on the grid, or help the planet, we will serve you with integrity and professionalism. We handle every detail of your project in-house, with our own employees, so that we can ensure the entire organization is accessible to you and focused on delivering the best experience and outcome.
Year Established
2018
Phone Number
3126380800
Reasons Why You Should Work With Us
  1. We provide a top of the line customer experience

  2. Your installation will look & perform great

  3. Our low-pressure, educational approach is loved by homeowners

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Elite installers earn top ratings from customers, endorsements from vendors, and win customers more frequently than their peers.

We speak

English

Certasun is the local expert in residential rooftop solar, solar batteries, and residential electric vehicle charger installations. When you work with Certasun, you get much more than just equipment. We will consult with you to find the clean energy solutions that meet your needs. We ensure you’ll get a product — and an experience — that will go above and beyond your expectations.

Services Offered

  • Installation
  • Electrical Contracting
  • Solar Repair & Maintenance

Certasun wouldn’t be where we are today without our outstanding team. We work hard every day to provide a customer experience that’s in line with our values: being honest, knowledgeable, accessible, and trustworthy. As a full-service solar installer, our employees handle every detail in-house from start to finish. The lifecycle of a Certasun solar project begins with our team of knowledgeable solar consultants who will work with you to find the solar solution that works best for you. You’ll move on to work with a project manager in our operations team, who will work with our engineering and permitting departments to get your project moving. Your system will be installed by our expertly trained team of electricians and solar installers who will drive your project to completion. We won’t forget about you after you’re installed; our customer success team will be there to monitor your system and address any future questions.

Associated product manufacturers

Associated financing companies

Workmanship Warranty

Our workmanship warranty is 10 years and includes a 10 year guarantee against roof leaks caused by the solar system.

Licenses

Business Incorporation: 0676322-7

Insurance

We are fully insured and bonded.

Certifications

Certified by the State of Illinois to install solar.

Industry Certifications

Manufacturer Certifications

  • REC Certified Solar Professional

What Customers Are Saying

4.8
16 reviews
4.8
Average Rating 16 review(s)
Response
4.7
Quality
4.7
Value
4.6
Service
4.7
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EnergySage Shopper
Nice folks, everything works, best for bottom line.

All the folks I interacted with from getting the quotes, chosing the design and system options, installation, permitting, etc were nice, knowledgeable, and helpful. The process from beginning to end takes a couple months or more, but my system was installed and operational faster than I expected. Some delays in the process came from my side, my misunderstanding. Certasun reps were very understanding and helped me through the entire process. I got a few quotes from other solar installation companies and Certasun had the best finanacial bottom line for me. They told me about rebates/net metering options and educated me on the full amount of SREC and other tax credits I am entitled to and helped me to apply for all of them. Other companies failed in this regard. I strongly recommend checking out and going with Certasun!

Posted by roberttseng on Mar 12, 2025
Top of line product and service

I found Certasun to be top notch from beginning to end. Attempting to work with Wisconsin based installers was a disaster. Ceratsun’s sales rep was knowledgeable, not pushy and listened carefully. I asked for a larger system to cover changes in future life style changes. That change came in March when I bought an EV and today, I’m pleasantly surprised that panels provide all the energy the car needs. The project manager I worked with was outstanding: very patient with my questions. While the total installation time was a little longer than anticipated, all great things take time. Certasun provided all forms for Wisconsin Focus on Energy rebates and federal tax rebates. When I compare the visual look of Sunpower panels to others in the area, I am more than very satisfied with the outcome. Thank you!

Posted by ssdankert on Jun 23, 2025
Certasun Met the Deadline

We used Certasun to install our Solar panels in fall of 2024, right before the regulations changed unfavorably in Illinois. They tried their best - and succeeded - in getting the job done on time which made a big difference. Additionally our project manager (Sally) was always very responsive to our concerns and with updates throughout the process. Now that the process is complete, Sally has given us some guidance re: rebates and tax benefits. We've been quite happy with our solar so far - nothing like electric bills that include nothing but the $15 a month cost of using the grid!

Posted by steven.long.67 on Jun 05, 2025
Great experience with Certasun

I shopped around for a solar provider and selected Certasun due to a combination of price and and their claims of taking responsibility for installation and renewable energy credits. I am happy to say that Certasun surpassed my expectations. As a homeowner, it was completely hands-off, Certasun took care of everything, even installed smoke detectors without charge when the village code changed and preemptively notified me and fixed an invertor issue a month or so after installation.

Posted by rrhill8950 on May 30, 2025
Certasun Was the Right Choice

After researching and getting quotes from several companies I am confident we made the right choice going with Certasun.  After their onsite inspection report I decided to go with more panels so Paul and the team responded quickly with a new plan and quote. Their value on cost per KW was in line with other companies and the equipment brands were what I wanted. Certasun secured paperwork with Illinois Shine, ComEd, and obtained Chicago permits quickly.  Installation took one day, with a follow up.  The install team was professional and friendly. They explained things and left the site very clean.  Unfortunately the Chicago inspector took over a month to respond. Sally and the team stayed on top of it and kept me informed of his arrival.  After passing the inspection, my system started generating electricity the same day.         Throughout the process Certasun was very responsive. They left me confident that the job, and the paperwork, were done correctly.

Posted by apatscott on Mar 16, 2025
Excellent Buisness

This company followed thru on everything they said they would do. Not only was the installation very professional but their front office was outstanding. I never had a problem getting a hold of someone to have a question answered. I didn’t know anything about solar but no worries because Certasun handled everything. The company was highly recommended to me and they didn’t disappoint. We would definitely recommend Certasun to anyone interested in going with solar. Great Job Certasun!!!

Posted by biggferg on Mar 13, 2025

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