Cancel

    Open app

    Search

    621 Energy

    5.0 (1 review)
    Open 9:00 am - 5:00 pm

    Services - 621 Energy

    Solar system installation

    621 Energy Photos

    You might also consider

    Recommended Reviews - 621 Energy

    Your trust is our priority, so businesses can't pay to alter or remove their reviews. Learn more about reviews.
    Yelp app icon
    Browse more easily on the app
    Review Feed Illustration
    Photo of S R.
    0
    2
    0

    8 years ago

    Helpful 0
    Thanks 0
    Love this 0
    Oh no 0

    You might also consider

    Verify this business for free

    People searched for Solar Installation 477 times last month within 25 miles of this business.

    Verify this business

    Revision Energy - Team photo 2023

    Revision Energy

    (13 reviews)

    Arlington Heights

    I hope your system never needs a warranty service. impossible to get a human on the phone and wait…read moretimes are apparently 10-12 weeks once someone deems it worth it to respond to emails. there goes this year's peak production. you might be better going somewhere else.

    We had a Sunbug system installed in 2019, and until this year I would have rated them 4-5 stars…read more The system was a good value and the sales and installation process back in 2019 were positive. But in January we noticed that one of the panels wasn't producing. We contacted Sunbug's service department, who did some remote diagnostics and hypothesized that the issue was caused by a faulty optimizer. They said it would be a few weeks before they could visit to perform the service, so we anticipated seeing them in February or March. After 6 weeks of radio silence, we followed up and were told they had us scheduled for April 14. The day the service was scheduled, we were informed that another job was taking too long and they would have to reschedule for the following week. After a few more weeks of silence, we followed up again. This inquiry was ignored, so 10 days later we followed up again. This time they said there was no update -- they were just too busy to do the work or provide updates. I had asked if they could recommend a partner that might have more capacity to service and was told no but that I was welcome to shop around. I am sure demand for solar is very high and qualified technicians are hard to come by, but I can't think of another situation that has taken approximately 6 months (and counting) to resolve after an initial estimate of "weeks." And the lack of information and tone of annoyance at my monthly inquiries has been discouraging. I wish I could still recommend Sunbug, but I would caution that, at least as of this review, they seem overwhelmed and out of ideas for adding service capacity or communicating accurately about their ability to service their systems. Having operated a business during periods of peak demand and service disruptions, I can't overstate the value of proactive communication about the cause of an issue, the plan for improving the situation, and guidance about what to expect when. Silence and "Sorry, no update, feel free to look elsewhere," do not inspire confidence. We are actively seeking help from other service providers, but it looks like we are going to be stuck with a non-producing panel during the peak production season.

    Critical Mass Solar - Pepperell, MA

    Critical Mass Solar

    (3 reviews)

    Critical Mass Solar is a superb business to do business with. I was fortune to find this solar…read morecompany to do an add on of solar panels on my roof. I can say that this solar company is a very efficient company and does a superb job with installing solar panels and cleaning up after the work has been finished. it is my opinion that Critical Solar has some top notch installers. The electrician is a professional when it comes to running electrical wiring for the solar system - he does a nice, neat and clean job that has a very nice appearance when you look up at the solar panels. I highly recommend Critical Mass Solar to anyone that is wanting to install solar panels on your house or add on solar panel to a system that is already on your roof. When it comes to payments - he takes one payment when the job is totally completed and up running like it is supposed to, other words, he asked to be paid in full when the job is completed. I found Critical Mass Solar employees to be very courteous, polite, and very caring about the owners property. This is truly a 10 star company 360 degrees to do business with here in Central Massachusetts. George

    Critical Mass Solar has been wonderful to work with. From the initial planning and applying for…read morefinancing through installation and working with Unitil, they've been there every step of the way, including getting quotes for removal of some trees to maximize production. I can't praise them enough for their great customer service. If you're looking to go solar, call Critical Mass.

    621 Energy - solarinstallation - Updated June 2026

    Loading...
    Loading...
    Loading...