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Certasun is a top-rated solar company serving the Chicago and Milwaukee areas. We provide residential solar, battery storage, and EV charger installation with integrity and professionalism.


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 They tell us we’re doing something right.

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.

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.

We don’t take installation shortcuts. Don’t assume all solar panel installations look the same — they don’t.

We will advise you on available financing options, but won’t push you to use any one of them.

Learn more about us at!
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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
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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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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.

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.


Business Incorporation: 0676322-7


We are fully insured and bonded.


Certified by the State of Illinois to install solar.

Industry Certifications

Manufacturer Certifications

  • Sunpower Authorized Dealer

What Customers Are Saying

7 reviews
Average Rating 7 review(s)
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Great experience with Certasun

From the analysis through the contract preparation and signing, pre-installation, set up and now usage, my experience with Certasun has been great. Communication was fantastic throughout the process from all involved and pretty much everything has gone to plan during that time. My system went operational recently and I am blown away at my production. Wish I had done it years ago! Only setback was the inspection but that was something beyond Certasun's control and they rectified the issue right away and the second inspection went through without a hitch.

Posted by brett.safron on Jul 05, 2024
Certasun = Outstanding!

Certasun is an outstanding company to work with. During my bidding process, I did consult with other solar installers. Certasun was by far the best value for my particular project, and after going through the entire process, I'm very happy we chose them. From the very beginning, I felt comfortable working with their salesman, and that level of comfort carried over to their customer service and installers. I was readily kept updated throughout the entire process from accepting their proposal, establishing a loan, the permitting phase, and ultimately the installation and going live on the grid. Id highly recommend Certasun for your solar project because you're getting a company with the knowledge, professionalism, as well as friendliness that you deserve.

Posted by aquaman1995 on Jun 22, 2024
Very good service

From the quote to the installation, good communication and the service provided was good.

Posted by pgrangeon1 on Jun 20, 2024
Solar Panel Installation and addition

From the very beginning to the end, I was very happy with their work. They were very professional and cooperative. I do not hesitate to recommend their services to anyone. They helped me with my state incentive for solar program.

Posted by pipaliyam on Jun 19, 2024
Worst service and warranty!

I don’t know why people are giving them five stars. We bought a house a month ago with solar panels from Certasun. It turns out that the system is not working, and the former owner, whom we will sue for misleading us, didn't inform us, although he was receiving the information from the app. We contacted Jennifer Rickel and Paul Doughty from Certasun. Except for promises that they would fix the problem, Paul Doughty misled us that we needed to register with Comed by sending an address of SunPower. And we have an official answer from SunPower that Certasun is responsible for the warranty. So, for more than two months, we have been unable to use any electricity produced by our solar panel system. Besides, Certasun technical service phone never answers and the robot never reply!

Posted by adrian.a.nedelcu on Sep 15, 2022
Great experience and efficiently working solar panels

Great experience working with Certasun. Got the job done as promised and the solar panels are working efficiently.

Posted by sivanatarajan on Dec 15, 2021



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