A homeowner signed with Devlin Energy in late April 2025 and was still waiting that November. First the system they had been sold turned out to be one National Grid would not support, so the plan had to be redrawn; then the interconnection application went in wrong, costing three more months. Another customer, writing in March 2025, spent months researching local installers and built a spreadsheet to compare them before choosing Devlin, and said their salesman Jon kept the whole job moving from start to finish.
Devlin is a Hingham solar company: residential and commercial arrays, ground mounts, battery storage, EV chargers and solar-with-roof projects across New England. It describes itself as family-owned and says it has put in more than 7,000 systems over the past decade, and it lists Tesla Certified Installer status. Its BBB profile is accredited with an A+ grade. On Google it averages 3.9 stars across 76 ratings.
The sale and the installation itself draw the warmest accounts, usually by name — Kyle, Jon, Andy, Sean, Kim, Matthew. Customers writing in 2023 and 2024 describe pitches with no pressure, written proposals detailed enough to compare against other bids, several options rather than one, and crews who worked tidily and left the yard clean. A homeowner who collected multiple quotes in the fall of 2022 picked Devlin for its components and the quality of the install at a competitive, though not the lowest, price. One in February 2024 valued that sales, installation and service all sat in one company rather than three.
What goes wrong tends to go wrong afterwards. In August 2024 a customer wrote that a large ground-mount system took close to a year from signed contract to built array. Another that month said the system was undersized and that when an inverter failed, Devlin supplied the part but wanted $425 to send a truck. In September 2022 a customer was told two weeks before installation that three more panels were needed, at $7,000 above the agreed price. Getting hold of service comes up repeatedly: one customer in September 2022 spent over a month trying to book an appointment with no reply to voicemails or emails, and another in September 2023 said a system 18 months old had worked properly for maybe three or four of those months. A 2024 review described an array that did not shut down when the utility cut power for work, after which the power company locked it off.
Some of those stories end better than they start. A customer who had left one star updated it in March 2024 to say Matthew Devlin reached out, took the complaint seriously and made it right, with an apology from the salesperson. Another whose panels had stopped reporting production updated in May 2023 to say someone finally helped and all of them were working again. A reviewer in April 2024 had problems after installation, said they were resolved promptly, and still counted the deal a good one against competing bids.
If you go ahead, get the after-sale in writing: who files the interconnection paperwork and what happens if the utility rejects it, what a service visit costs once the system is live and whether a truck charge applies, and a panel count and price that are fixed at signing. Those are the points where it went wrong for the customers who were unhappy.
