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The Most Experienced, Highest Rated
Solar Installation Company in Northeast TN

Solar  •  Wind  •  EV Charging  •  Battery Back Up  •  Hydro 


Free Estimates

We provide free, no-obligation estimates on residential and commercial systems.

No Pressure. No Unrealistic Promises. 

About Us

Affordable solar energy in East Tennessee


Owner & CEO

Welcome to GTRE - a 100% locally owned and operated that you can trust as your partner for renewable energy solutions. Founded in 2008 by Ian Huddleston, GTRE has been at the forefront of delivering cutting-edge renewable energy systems to homes and businesses in Northeast Tennessee. We are proud to be a reliable source for those seeking energy independence and significant electrical cost savings. Headquartered in Johnson City, TN we work to exceed expectations in every project we undertake. Our 5-star reviews, from actual customers, reflect the trust and confidence our clients placed in GTRE. You can trust us too.

Read more at  and Google

>> See why GTRE is the most reliable renewable energy company in the region.

Affordable solar energy in East Tennessee

The North American Board of Certified Energy Practitioners (NABCEP) is a nationally-recognized, certification program for photovoltaic (PV) solar system installers. Certified installers must have a certain amount of work solar experience, pass a rigorous exam, sign a code of ethics, and take continuing education courses for re-certification every three years. 

Ian Huddleston ​

Certification # PV-041115-010730

Affordable solar energy in East Tennessee

A trade license provides proof of your experience and skill. Only licensed electricians can: operate a business and advertise services, obtain commercial insurance, pull building permits, pass inspections, and bid on public and government projects.

TN LLE Electrician's License

# 00060873

Affordable solar energy in East Tennessee

As a locally owned and operated company, we take pride in providing residential and commercial clients with high-quality installations, maintenance, and support services in Johnson City TN, and a 50-mile radius around it. We remain committed to providing people and businesses with energy security while saving on the ever-rising cost of electricity.

Headquartered in

Johnson City, TN

What Clients Say...

"Greene Tech did a great job. It's exactly what I had hoped it would be. The install was basically perfect. The symmetry of the install was perfect. All electrical connections and conduit runs are perfect as well. It really is as I describe it and I would recommend them to anybody!" 

Tom P

GTRE Projects

- Residential Clean Energy Credit  -

30% Tax Credit

on new residential renewable energy systems

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