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Our Vision

The goal of DeFreitas Enterprises, LLC is to offer amazing turnkey solar installations for home and business owners. We take care of all the design work, utility applications, permitting, and construction. We also apply for any available incentives, and monitor your system upon completion for years to come.

We also offer specialized construction services, and fully offgrid capable solar + storage, utilizing generators and battery storage.

Our Story

Established in September 2015 DeFreitas Enterprises, LLC has installed over 500 kW of residential solar installations for over three dozen local home and business owners here in Massachusetts.

We are currently expanding our business and project offerings into new enterprises, and are excited for the opportunities on the horizon.

Meet the Team


Alexander DeFreitas

President & Chief Engineer

A lifelong resident of Chelmsford, MA, Alex has always been passionate about our environment, and how we power our planet. After completing his Bachelor of Science in Mechanical Engineering at the University of Massachusetts - Lowell, Alex worked in the solar industry before establishing DeFreitas Enterprises, LLC to offer renewable energy projects to the NorthEast United States.


David Shanahan

Sales Manager

Also a lifelong resident of Chelmsford, MA, David Shanahan joined our company in early 2019 to focus on sales and new client acquisition. He is passionate about the environment, and can be found growing vegetables in his home garden in his spare time. He also enjoys bike and BMX riding and snowboarding in the wintertime.

David graduated from the University of Massachusetts - Amherst in 2017 and has worked previously as a home energy auditor with HomeWorks Energy.

I'm interested!

Visit our contact page, click the button to the right, or scroll to the bottom of our page for our direct phone number and contact email. We look forward to discussing your project with you!