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    Greentech Renewables

    5.0 (1 review)
    Open 8:00 am - 4:00 pm

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    Services - Greentech Renewables

    Add to existing system

    Add solar panels

    Add solar panels on roof

    6 More Services

    Add solar shingles on roof

    Solar system installation

    Solar rooftop panel installation

    Solar shingle installation

    Solar system maintenance

    Solar system repair

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    3 years ago

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    Windfree Solar

    Windfree Solar

    (12 reviews)

    Sauganash

    My experience with Windfree Solar Company has been awful. Consider carefully reading the contract,…read morenoting if subcontractors would do the solar panel installation, if so, will Windfree cover losses, if applicable. In addition, make sure all the permit is pulled with your municipal, along with the correct schematics for the solar panels, both were an issue here. After speaking with Adam Perri, Director of Windfree Solar, I was told, due to the workers were subcontractors, the destruction of my personal outdoor equipment and garage was not Windfree problem. All the woes, leaves me with the savings from the schematics of 77% savings, panned out to 18%. Monitoring for the solar panels based on the information I was given was a country outside the U.S., with no option to opt out of 3rd party advertisement. No thank you! Value=NONE!

    This company are bailed out from a 1-star review by the fact that they subcontract the installation…read moreto a pretty decent electrical contractor. Windfree Solar as a company are pretty sub par. These guys installed my solar panel system, Pretty decent size system. Living in Chicago there are certain permit requirements so you are limited as to who you can actually go with. People have asked me for a recommendation and I cannot in good conscience give these guys a nod. Their organization is atrocious. The only competent member of staff that I have dealt with is the sales person Renner. I had a project manager by the name of Mark Anderson, who was either woefully, incompetent or just didn't give a crap. And he was either fired or quit before the end of my project, which threw it into limbo. There were errors on the submittals for the permit, They were errors with the details of my system. Come time for inspection. Even organizing the initial measurements and details was not without some drama. So here we are almost 8 months after my system has been energized, come to find out that due to another error on my paperwork, the energy credits Which I am due to be paid well take an additional six months. The only reason I found this out is that somebody decided to email me to let me know that I needed to re-sign my paperwork, but then when I asked questions as to why I received no response. And that seems to be the theme of this company. I get that they are essentially a facilitator of the installation and supposedly able to take care of the paperwork required for this kind of project, but they took a pretty decent commission for those services. I know this because the actual Supplier of the solar panels has to write to me to tell me how much the solar panels actually cost. I don't begrudge them making money on that service, I would've appreciated that they actually did the service correctly for which they were paid. Doesn't seem unreasonable. That being said, I would recommend their installers for whom I will write a separate review but these guys... I would give a hard hard pass. You can do the paperwork yourself, and save yourself about $8000 and dealing with amateurs apparently.

    Certasun

    Certasun

    (20 reviews)

    Update on 4/27/26 Only by writing my honest review did I get…read morethe attention of the executives at this company and my phone call returned today. They decided to refund my $1800 for removal and not pursue working with me since their service could not "meet my satisfaction." Expecting a response within a week is reasonable for any active business this size. If you read the review of others here you will conclude that I am not the only customer who has experienced lagged and/poor communication. I suggest you improve your support workflow in order to thrive in this industry. In the few hours that have gone by, I was able to get a quote and schedule service with another local company. Original Review Do not rely on this company for good customer service from the operations end, good communication or follow-up. They require you to pay an invoice before any work is done. However, when it comes time to schedule the service no matter how many messages you leave or emails you send, don't expect to hear back from them. Research and find another company (if you need work done expeditiously)!

    My solar purchase and installation took well over 6 months in 2024. Although I purchased my panels…read morein June, they were not installed until the end of October. After the first winter I had some concerns about loose shingles and called. A service answered and took a message and it took weeks before I heard back, months before anyone came out to look. While I am happy with the solar system, a year and a half in I believe I may need more panels (I wanted to purchase more panels). So I reached out to CertaSun - they still have a service answering the phone and taking messages. Over a week later, I still haven't heard back. Their communication, responsiveness and customer service is disappointing. For the amount of $$ these systems cost, I expected better service.

    Passive Power

    Passive Power

    (1 review)

    From first contact to the final installation of our solar panels,Mentor showed highest…read moreprofessionalism and excellence. Because,I had no experience on solar system,mentor provided all of the information repeatedly with respect. He worked with us on a PERSONAL level,guided us throughout the process.five stars all together and a big THANKYOU. Mentor is a real MENTOR and I highly recommend him .

    From the owner: Our solar business specializes in providing residential customers with high-quality and reliable…read moresolar energy solutions. We understand the importance of transitioning to clean, renewable energy, and our goal is to make it easy and accessible for homeowners to harness the power of the sun. Our team of experts will work closely with you to assess your energy needs and design a customized solar system that fits your home and budget. Our solar systems are designed to be both efficient and cost-effective, offering homeowners the opportunity to save money on their energy bills while reducing their carbon footprint. We use only the best products and materials, and all of our installations come with a comprehensive warranty for added peace of mind. At our residential solar business, we believe in providing our customers with exceptional service and support every step of the way. Whether you are looking to reduce your energy costs, become more energy independent, or make a positive impact on the environment, we are here to help you achieve your goals. Contact us today to learn more about how we can help you harness the power of the sun!

    Greentech Renewables - solarinstallation - Updated June 2026

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