Years in business

> 13


Review score is above industry average of 3.96



NABCEP qualified installer


Solar panel cost calculator

Latest Energy Monster reviews

Latest review

Jim Martin 1 week ago

My wife and I had our solar system installed by Energy Monster just about one year ago. The staff at EM were very thorough, answered all of questions, and fully explained the system they thought would be best for us. Once the system was installed, it was turned on July 1st, so we had July, August and September, of extended daylight, which provided us with great production. Fall and winter, with shorter sunlight, obviously not as productive. As of our first spring with solar, March, April, May and June we have produced more than the first 6 months of having the system. We have accumulated a substantial credit with National Grid which will offset the most if not all electric usage in the fall and winter months. We are very pleased with system, all that the Energy Monster Team has provided us. Jim Martin--Hopedale Ma

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Latest complaint

Jeff from Naples, over 1 month

I thought choosing Energy Monster of FL. was a smart choice to purchase and have installed a Sonnen Battery Back Up System with 6 panel array to add to our existing 25 panel system. Worse choice I ever made! Here are just some of the things they did wrong: *Never checked our house wiring before the actual install - or even afterwards! 9 months later they tell me our house has a "neutral ground loop" & that i should hire an electrician - everyone knows the installer is responsible for this- not the home owner * The wiring in our house- should have been checked for BEFORE the install *Wired the unit incorrectly- we would have failed inspection + very dangerous! *Never tied the old system to the new system they installed (found this out 4mos after the install) *They expected the unit to operate with just 6 panels- which would never have worked properly *Had me re-sign NOC because "they lost the original one" *Hired a new "GM" who promised they would take the system down and out of out house- but then Duane W. this supposed new GM refused to do what he promised- cursed me out and hung up the phone on me *Mr. J Leet the owner has NEVER called or emailed me to apologize or to try to resolve the issue(s) *They never told me at first that all 25 of our original invertors were "dead" the only good thing they did during this entire debacle was to change them for me for free labor *With all the down time the Sonnen has needed battery replacement 2x (luckily under warranty) *The orig installer for Energy Monster (who did not know what he was doing- or maybe he did the shoddy work on purpose....) quit claiming Mr Leet the owner owed him $$$$ The next 2 service techs he sent to our home were NOT certified by Sonnen! No wonder they could not fix it at all- even with Sonnen's help over the phone! Both of these "techies" eventually quit while im still left with out a working system! (turns off after 5mins after being turned back on) WORST CONTRACTOR I HAVE EVER DEALT WITH! Stay away from Energy Monster- do your research better than i did!

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Energy Monster prices

This installer does not publish their standard system prices on the net.

As such we have used average pricing from the installers service areas as a proxy for what this company would most likely charge for a solar system.

System size


Average cost per watt


Net cost of system

$11,324 - $13,840

Average payback time

Annual power production

8,747 kWh

Levelized cost of solar energy

Levelized cost per kWh is the cost of the solar system divided by the total number of kWh produced by a solar system over it’s lifetime.

0¢ kWh

If you don't get solar

42¢ kWh

Forecast average MA electric rates over the next 25 years

Installers description for their business

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.

With years of residential energy efficiency projects, solar expertise and local partnerships, Energy Monster will ensure you a successful home efficiency project that will save you energy and money for years to come. 

MA CSL: CS-071498

MA HIC: 188796

MA Electrical: 22683-A

NH Electrical: 0481C

Brands sold



311 Main Street 2nd Floor, Worcester MA, 01608


(click to reveal) ..5525


Energy Monster

Office locations

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311 Main Street 2nd Floor, Worcester MA, 01608


12087 62nd Street North Suite 2, Largo FL, 33773

Service locations

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Accreditations and affiliations

Better Business Bureau Solar Energy Industries Association

Service Types

Residential solar - Grid tied

Small commercial solar - Grid tied

Energy audits

Residential solar - Hybrid solar systems

Energy monitoring

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