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Energy Monster - Profile & Reviews

Energy Monster is your local green expert when it comes to improving a home’s energy efficiency and comfort. We help homeowners by offering leading edge home performance solutions that save energy, lower utility bills and lead to a more comfortable home.

20 reviews

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  • "Let the sun shine! We're ready!"

    Reviewed Feb 11, 2021

    The guys at Energy Monster did a great job. They were polite, professional, and answered all my questions and concerns. They took care of a needed carpentry job in the attic, a knee wall, at no extra charge, as well as the building permits, and provided the documents needed to get the state and federal tax breaks. The whole process took longer than I expected, but a big part was waiting for Eversource to connect my system to the grid. But all in all, it was a great experience.

  • "Top notch customer service from start to finish"

    "Top notch customer service from start to finish"

    Reviewed Jan 22, 2021

    My Husband and I have been interested in going solar for some time. We have done some research on what we were looking for and looked into a few different solar companies. In the end we wanted someone that is local and that will be around for more than a couple years unlike the bigger companies that seem to keep closing their doors. We had the privilege on working with Kevin Markey. He is very knowledgeable, quick to respond and very attentive to what we were looking for. He sent over the proposal and met all of our requirements (my husband is very picky). The whole process was very smooth. From the initial site visit to final inspections all that were involved were very professional, courteous, and made us feel safe during these questionable times (covid). I would HIGHLY recommend Energy Monster to anyone thats looking for a company that will be there answering ALL your questions from start to finish.

  • "Do not take this company"

    Reviewed Sep 22, 2020

    Signed the contract 5 months ago and still no operational solar panels. Took two months just to get the panels up. Now the building department will not pass the inspection for various reasons. The person who was working on my job quit and left the company so looks like be up to year or more before I can get the panels operational. Save your time and money and go with a trusted company.

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With years of residential energy efficiency expertise and local partnerships, Energy Monster will ensure you a successful home efficiency and solar project that will save you energy and money for years to come! All of our employees are Energy Monster employees, nothing is subcontracted out.

  • Installation
  • Energy Auditing
  • Electrical Contracting
  • General Contracting
  • Solar Repair & Maintenance
  • Energy Efficiency
  • High Efficiency Hot Water
  • High Efficiency HVAC
  • Solar PV
  • Energy Storage
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Associated financing companies

Associated installers

  • Energy Monster

Get a custom solar estimate for your home

Get a custom solar estimate for your home

Based on your roof and actual offers in your area

Try Solar Calculator



Energy Monster Headquarters

100 Lamartine St
Worcester, MA
01605 United States

Local Offices (2)

  • 311 Main Street
    Worcester, MA 01608
  • 12087 62nd St N Suite 2
    Largo, FL 33773

Workmanship Warranty

Solar 20 years "Bumper to Bumper" - any components of the solar system, any parts of the home that have been affected by the solar system (Roof, roof penetrations, electrical system, areas that hardware has been mounted / conduit runs).


Certified Sonnen Battery Installer, BPI, Envelope Professional


BPI: 5021229
Envelope Professional: 5021229
Florida Certified Solar Contractor: CVC57085


Business Incorporation: 814696006
NABCEP: Currently getting certified
Electrical: 2615
HIC: 176201


Oxford Insurance Agency / Arcadia Insurance Company, Liability, Workers comp.

States served by Energy Monster

  • Massachusetts MA ,
  • New Hampshire NH