Verified profile
Updated: 07 March 2023

Installing solar since 2018

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4.71 from 139 Reviews

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SolarReviews Expert Rating Score:

A score we give a solar company out of 100 based on 13 criteria that our SolarReviews industry experts believe are the best criteria to separate good and bad solar companies.


Rating breakdown

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Certasun reviews

Breakdown of consumer reviews

Sales Process


Price as quoted


On schedule


Installation quality


After sales support


Latest good review thumbs up

NewHome Owner | Algonquin, Illinois | 03/13/2023

Happy with the team, equipment and process, from start to finish. System details / pricing was accurate, system looks good, conduit is hidden, installers didn't leave a mess behind, etc. They handled the State credit, City permits and the HOA approvals, too. Will definitely be recommending CertaSun / SunPower to all the neighbors in our new development.

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Latest bad review thumbs down

Anonymous | Grayslake, Illinois | 12/27/2022

Unprofessional and false timelines

This company was awful to deal with. The sales process was fantastic, they break everything down for you and give a nice presentation. When you sign up, you’re given a timeline as to when you can expect installation and activation. I signed up at the beginning of April and my panels weren’t online until mid October. I was advised that installation was going to be in June and they’d be activated no later than July. That wasn’t the case. The operations team doesn’t communicate internally so you’ll get multiple calls from different people asking for the same thing. Additionally, they don’t listen to voicemails or respond to their customers. You may even get an “accidental” email that berates you as a customer and tells you what you can expect. The sales gentleman is completely off from his timeline. Do not get your hopes up on what he says because it’s inaccurate. Lastly, I just put my Christmas lights up in November and found a full can of WD-40 under a panel. Now, had that can pressurized from the sun and exploded, my panels and roof would have been severely damaged. There are other great companies out there and honestly, so far my solar power is quite minimal and almost pointless.

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All reviews


David Buddingh | Elmhurst, Illinois | 03/07/2023

Great Job

We loved our experience with Certasun and recommend them to anyone considering solar.

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Mike Miller | Naperville, Illinois | 02/20/2023

High Quality Solar Panels / Good Installation

As an Electrical Engineer, I was focused on getting the highest efficiency solar panels and the cleanest look on the roof. Certasun installation has NO conduits running on the roof. The crew was very efficient on installing the panels. The final installation looks great and performs as specified.

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Chuck & Dixie G | Yorkville, Illinois | 02/09/2023

Solar install.

Certasun was excellent from start to finish,Bill really knows his products.the installers were very helpful and friendly and very knowledgeable and respectful.The temperatures on installation day was below freezing and they were very friendly and considerate. The finished product looks great and is working great,.My wife and I are very pleased with the quality of the work .

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Channu K | Woodridge, Illinois | 02/03/2023

Good Service & Commitment

Good Service & Commitment; Completed the project as per the plan and info provided.

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David J | Oak Park, Illinois | 02/03/2023

Powerful and reliable system

Certasun did a fantastic job installing our 12-panel Sunpower system on a challenging roof. The installation looks much better than most others I've seen - close to the roof and no exposed conduit. The system provides more than 90% of our electricity to date (most months Comed bill is $14). Installation inside was very clean with monitoring box mounted where requested. Have had zero issues in past two years - system just works and generates power. Certasun was also very helpful and detailed with the financing and IL rebate process which all came through as expected. Highly recommend!

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Nicholson | Niles, Illinois | 02/01/2023


Everything was done well. Everything was explained. Installation was delayed for multiple reasons (some my fault), but eventually completed in a timely manner. A window was damaged in the process, but Certasun has promised to fix it.

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Nate D | Forest Park, Illinois | 01/08/2023

Transparent, professional, not salesy

Certasun was fantatic. They were honest and transparent throughout the whole process. Sales people were not pushy or annoying. The installers were the nicest contractors I've ever had work on my house; and they worked their butts off too. The *only* wrinkle in my experience was that it took several months to actually get the panels. But that seemed to be more of an industry-wide issue, rather than just Certasun's issue. In the end, they gave me slightly higher wattage panels for no extra cost to get my panels installed sooner.

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D Burrus | Chicago, Illinois | 01/04/2023

Solar panel installation

Certasun was outstanding to work with. The proposal included reasonable, even conservative, assumptions about system output given area weather conditions. They provided clear, detailed information throughout the process. The installation crew worked efficiently and kept the work site clean. Post-installation follow-up with local electrical inspectors and the utility was smooth and hassle-free for me as the homeowner. I would unreservedly recommend them to others.

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Mike (MEC) | Hampshire, Illinois | 12/21/2022

Going Solar with Certasun...

Reputable, Knowledgeable, Professional... this is Certasun!! We interviewed three companies amongst much internet research and speaking with other couple's experiences and choose Certasun for the three keys mentioned above in addition to their affiliation with the solar panel manufacturer SunPower. The deciding factor was their offer including the state dollar credit from day 1 when other companies putting it on the purchaser to 'apply for' the state credit after an 18-month (+/-) performance period to assure the state that solar power production was actually being produced to the levels stated in the proposed work. This was key and said to us that Certasun was placing 'skin in the game' by ensuring this production from the very first day!!

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Hem Shankar | Rolling Meadows, Illinois | 12/19/2022

Happy overall with my installation

Certasun was very much upfront starting from the presales process and transparent about every step of the process. Bill Wayne (salesperson) shared me every detail including slight increase in home owners insurance. Installation team did great job as well by showing the plan and discussing the need to change little bit as a result of vent introduced after the plan was prepared. Certasun did a great job from start to finish with our solar system installation. I am really happy I picked Certasun for this project.

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1 comment >
Reply from Certasun: Thank you very much for your review and sharing about your solar experience! We're so glad to hear you felt well informed by our team throughout the process, and that you are happy with the final project! We really appreciate you choosing Certasun.

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Service types

Residential solar - Grid tied

Residential solar - Hybrid solar systems

Energy monitoring

SunPower SunVault

About Certasun

We will never subcontract your installation to a third party. Our own well-trained, licensed electricians and installers will install your system carefully and in compliance with all safety codes and regulations.

Certasun uses SunPower equipment, the highest-quality, highest-efficiency, best-warrantied, best-looking products in the industry. SunPower equipment comes with a 25-year Complete Confidence warranty that covers both equipment and labor in the unlikely event of any problem.

Office locations


Illinois - Buffalo Grove

1582 Barclay Boulevard, Buffalo Grove IL, 60089


Better Business Bureau UL Certification

Contact Certasun

Location pin
Head Office
1582 Barclay Boulevard, Buffalo Grove IL, 60089