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ACE Solar

Whether you’re looking for a small residential system, large scale commercial rooftop, ground mount, landfill, brownfield, carport, warehouse, or any sun-soaked piece of your property, ACE Solar has the experience and expertise to engineer, procure, construct, and maintain a cutting edge solar array for your home or business.
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ACE develops, finances, builds, and operates residential, commercial and utility-scale solar PV projects. ACE has developed and/or built over 300 MW of solar PV projects across the US. We succeed by listening to our partners and clients, offering flexible, innovative solutions tailored to their needs, and driving the project to successful completion with well-honed risk management and operational discipline.
Year Established
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Reasons Why You Should Work With Us
  1. #1 solar installer in Massachusetts for 6 consecutive years and #47 in the country

  2. Family & Veteran owned and operated, founded on over 40 years of industry experience

  3. We take a no pressure, education first sales approach to help you determine if solar is a good fit for your home or business

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Elite installers earn top ratings from customers, endorsements from vendors, and win customers more frequently than their peers.

We speak

English; Spanish

Whether it’s a residential system, commercial property, landfill, brownfield, large plot of land, airport property, convention center, warehouse, carport, or strip mall, we have the experience to engineer, procure, construct, and maintain an optimum solar array for your home or business.

Services Offered

  • Installation
  • Financing
  • Construction
  • General Contracting
  • Solar Repair & Maintenance
  • Community Solar

ACE Solar is a family and veteran-owned EPC based in Massachusetts that develops, finances, builds, and operates residential, commercial, and utility-scale solar PV projects throughout New England and beyond. ACE has developed and/or built over 300 MW of solar PV projects across the US!

Workmanship Warranty

Industry Leading


Professional Engineering
General Contracting
Home Improvement Contractor


General Liability, Workman's Compensation, Disability, Automobile, Umbrella


NABCEP, U.S. Green Building Council

Industry Certifications

Manufacturer Certifications

  • Certified Installer
  • Certified Solar Professional
  • PWRpartner
  • SolarEdge Preferred
  • Sungage Financial Certified Partner

What Customers Are Saying

33 reviews
Average Rating 33 review(s)
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No Surprises

Very pleased with Ace Solar's professionalism and quality of work. They were in frequent communication with me at all stages of the project and stayed on-schedule throughout. Although the lead time from signing to turning the system on was long, the schedule they told me upfront was met. The system has been working without issue ever since.

Posted by jaywennemer on Feb 13, 2024
Excellent local installer

The entire team at ACE Solar has been a pleasure to work with. My salesperson Sam Willis contacted me via EnergySage when I was shopping around for a solar installer. Sam was responsive, knowledgeable and never pushed me towards anything I didn't want. Sam worked with me to update the proposal to include more panels and switch to a microinverter solution. I signed the contract at the end of January 2023, had my site visit about four weeks later, and the panels were installed mid-April 2023. The install crew finished the entire job in less than a day and was absolutely phenomenal - they were professional, courteous and didn't take any shortcuts or cut corners. They cleaned up after themselves meticulously - one of the electricians even came inside to vacuum the attic insulation that fell down during the install. The inspections and utility approvals took another two months and I received permission to operate in mid-June 2023. Shirley Mapes (the customer care mananger) kept me updated throughout the process and always answered my questions via email in a timely manner. I am extremely satisfied with my new solar system and my electricity cost savings. In mid-July 2023, half of my panels stopped working and I needed to contact the ACE Solar service department. It took two site visits and 6 weeks to get the issue resolved (some cabling came loose and had to be re-secured), but my system is now fully working again. There was a 3 week period where I had trouble getting in touch with anybody, but otherwise I found their service department to be very responsive via both email and phone. Overall I am very happy with choosing ACE Solar and will be recommending them to any friends, family, or co-workers interested in going solar!

Posted by edisontam on Sep 10, 2023
Excellent service, project completed on time and very well done

During the whole process from the initial assessment and quote to the completion of the installation of our solar system Ace Solar and their teams provided an excellent service, they have been extremely professional, very thorough and very pleasant to work with. Their installation was very clean, smooth and on time. I was beyond impressed with how their teams work together in harmony, their schedules very well synchronized and everything was completed on a timely basis as promised. Upon the final inspection the inspectors commended them on the clean and thorough work and shared with me their deep satisfaction with the complete setup. Sam Willis was my contact throughout the whole implementation, he was not only very involved and caring throughout the whole project, but also reached out to me during the multiple stages of the project to explain the next steps and to walk me through the plan for that stage. He was always responsive and always followed up with me with the necessary details any time something needs to be done. If you are looking for a Solar vendor in their area of service I would encourage you to reach out to Ace Solar for a quote, and of course for the whole solar system implementation too. You will be informed about the whole procedure and you will have a vendor who is there to help you understand the process from start to finish. I am confident that you will be very happy with their service. I am glad I picked Ace Solar as our solar vendor, I will definitely reach out to them without any hesitation any time I have a solar project in the future.

Posted by george on Aug 29, 2023
Solar Quote

The quote for the panels and battery storage was reasonable but could have included more details for the storage. Professional salesperson but other companies were willing to visit onsite or zoom before charging a fee for an estimate.

Posted by dtoomeysr on Aug 12, 2023
Solar Installation

Corey was so patient with all my questions and always responded quickly. Too many names to mention ,Asmi to the installation crew did a fantastic job. Thank you.

Posted by lizziemessinger on Apr 17, 2023
Good PV company, poor post installation support.

Update: Ace Solar found out they had installed the wrong gauge of wire, misconnected the batteries, and more. After a year they finally sent someone out. The system still not working, but if you buy batteries from Ace Solar, you can expect a year to get them working. Their operations voicemail is full, indicative of their commitment to their customers. Read the reviews, a year to get back to the customer. Also note, all the new reviews on the same day, nothing for years, now multiple in the same week. Original post Worked with Ace Solar to get a full system installed. PV and Batteries. Their sales team was top notch and a league above the other teams. Solar installation was mostly painless, but due to battery shortage at the time, my system was installed over 2 years. The installation of the batteries happened in the second year, and we were off to the races. The problem is "service". Getting a response from ACE post-installation doesn't happen. My batteries failed within 2 months (right before summer, the key time for batteries) and it took the whole summer to get them working. 2 months between responses is NORMAL for the service manager. Expect amazing sales service, but follow-up service is spotty. Expect to have to monitor your system, and push constantly to get it fixed. Update: Batteries failed again at the 1-year mark. Seems 1 battery charges, and discharges, and the other battery is only charged if the first one hit max. So the 2nd battery isn't always being charged. Then there is something new about batteries not performing in cold weather is the cause. They chose the installation location, and sourced the batteries. Response to Ace Solar: A site visit was scheduled, after discussing it for the past months. Yes, for the past 7 months, I have been chasing the current issue. Which was after the previous 7 months when the batteries didn't work. That means since installation there have been 2 months with no problems. Equally frustrated means 2 months of no response, constant "we thought it was all fixed", and "you don't understand how the system works". There are no faults, but the system doesn't work 6 hours a day. So you say it is working. You don't see faults, but the system limits the charge/discharge rate. You say the system works, but on the first "power outage" the system failed. So no faults, just not working. So Solar Edge says talk to Ace Solar, Ace Solar says talk to Solar Edge, the customer success person disappears for 2+ months, and all the time Ace Solar says 'well the PV system is working". The Recent "firmware" change that I had to call Solar Edge to get done, as Ace Solar was "unavailable" per normal. "work with manufacture", yes, 14 months since installation, 1 lost summer of connected solutions, 1 poor winter of battery use, with a failure on the battery back up and we may have someone out soon. What Ace Solar Claims is "no faults" because the system has failed.

Posted by bowmanward on Feb 24, 2023
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    • Solar PV
    • 9 kW
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    Cambridge solar installation
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