GTRE

What GTRE does

GTRE (Greene Tech Renewable Energy) is a 100% family-owned residential and small-commercial renewable energy installer founded in 2008 by Ian Huddleston and headquartered at P.O. Box 2226, Johnson City, Tennessee. The company designs and installs integrated energy systems combining solar photovoltaic (PV) generation with battery storage (Tesla Powerwall, SolarEdge, Enphase, Generac, Franklin WH, EG4, LG Chem, Mango Power, Outback, Schneider), residential wind turbines (Bergey, Bornay), micro hydroelectric systems (PowerSpout), and propane/natural gas backup generators (Briggs & Stratton exclusive dealer, Bladon microturbine GenSets). Its technology stack is systems integration rather than proprietary R&D: GTRE curates best-in-class third-party hardware and provides the design, installation, and service wrap, supported by owner Ian Huddleston's NABCEP PVIP Board Certification (the longest-standing within 100 miles of Johnson City) and a TN LLE electrician's license.

The business offers Home Energy Optimization products (SPAN smart electrical panels, SANCO2 CO2 refrigerant heat pump water heaters, Level 2 EV chargers), solar panel cleaning using pure-water-fed poles, and ongoing system monitoring through OEM apps, with a 5-year service warranty on GTRE installations and repair coverage for competitor-installed systems. Revenue derives primarily from per-project hardware resale plus installation labor, with project pricing tiers spanning roughly $5K to $50K+ (off-grid systems starting at ~$40K), supplemented by recurring service and maintenance calls.

The go-to-market is direct-to-consumer owner-led consultative selling within a tightly defined 50-mile service radius around Johnson City, TN; no external sales staff, no subcontractors, and lead generation runs through the website's educational content, free no-pressure estimates, and reputational pull from 5-star SolarReviews and Google ratings. The customer base is predominantly residential homeowners seeking energy independence and outage protection, with a secondary small-commercial segment; pricing varies by system type (off-grid full independence, grid-tied with battery backup, partial backup, and standby generators only).

Name

GTRE

Legal name

Gas Turbine Research Establishment (GTRE)

Website

https://gtresolar.com

Company type

Private

Founded year

1963

Operating status

Operating

Headcount range

11–50 employees

Short description

GTRE (Greene Tech Renewable Energy) is a family-owned Johnson City, Tennessee installer that designs and installs solar PV, battery backup, wind, micro-hydro, and generator systems for residential and small-commercial customers within a 50-mile Northeast Tennessee service area.

Ownership category

akta.pro rank

Product category

Solar and Renewable Energy Installation Services

NAICS

Electric Power Generation (22111)

akta.pro primary industry

Distributed & Commercial Renewable O&M (Rooftop Solar, C&I Wind, Small Hydro) (EUAMAGAB)

akta.pro secondary industries

Distributed Storage (Behind-the-Meter Batteries) (EUAMAJAE), Gas-Fired Power Plant O&M and Life-Extension/Repowering Services (EUACABAJ)

Keywords

• Solar panel installation
• Battery backup systems
• Wind turbine installation
• Micro hydro systems
• Renewable energy services

Headquarters

HQ city

Midway

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Supply Chain, Operations, Marketing or Sales, Technology or R&D

Revenue model

1. Solar PV Systems: Installation and sale of solar photovoltaic systems for residential and commercial properties. Revenue generated from system sales, installation, and ongoing service/maintenance.
2. Battery Storage Systems: Battery backup systems including Tesla Powerwall, SolarEdge, Enphase, Generac, Franklin WH, EG4, and other major brands for backup power and grid outage protection.
3. Wind Turbine Systems: Residential wind turbine installation using Bergey and Bornay products for customers with suitable wind sites.
4. Micro Hydro Systems: Micro hydro power generation for properties with flowing water sources. PowerSpout systems for water-to-energy conversion.
5. Fuel Generators: Propane and gas-powered generators from Briggs & Stratton and Bladon for backup power, standalone or combined with solar systems.
6. Service and Maintenance: Service calls, repairs, and maintenance for solar and renewable energy systems. 5-year service warranty on GTRE-installed systems.
7. Home Energy Optimization: SPAN smart panels, SANCO2 heat pump water heaters, Level 2 EV chargers, and energy management systems for home electrification.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

GTRE designs, sells, and installs residential and commercial renewable energy systems in Northeast Tennessee, including solar PV, battery backup, wind turbines, micro hydro, fuel generators, and home energy optimization products. The company also provides installation, ongoing service, and maintenance for the systems it sells, supported by a 5-year service warranty on GTRE-installed systems.

Product overview

GTRE (Greene Tech Renewable Energy) is a 100% family-owned residential renewable energy company serving Northeast Tennessee since 2008. The core offering is Solar PV systems, supplemented by battery backup, wind turbines, fuel generators, and micro hydro systems. The company provides a comprehensive portfolio of products and services including: Solar PV as the primary product; Solar Battery Back-Up as a key add-on for energy storage and grid outage protection; Fuel Generators (Briggs & Stratton, Bladon) for backup power; Wind Turbines (Bergey, Bornay) for additional clean energy generation; Micro Hydro systems for properties with water resources; and Home Energy Optimization services featuring SPAN Smart Panel, SANCO2 Heat Pump Water Heaters, and Level 2 EV Chargers. GTRE also offers monitoring services through SolarEdge and Enphase apps, plus service and maintenance for installed systems.

Differentiator

Problem solved

Functional benefit

Products and services

• Solar PV Systems
• Solar Battery Backup
• Wind Turbines
• Micro Hydro Systems
• Fuel Generators
• Home Energy Optimization
• Service & Maintenance
• Solar Panel Cleaning

Quantifiable outcome

• Dirty solar panels can lose up to 20% of their efficiency without proper cleaning

Named customers1 record

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Feature1 record

Partnerships

Five partnerships are on record, tiered core.

• SolarEdgecoreTechnology or IntegrationCertified installer and partner offering SolarEdge inverters and monitoring systems. GTRE provides installation, service, and troubleshooting for SolarEdge systems with support for MySolarEdge app monitoring.
• TeslacoreTechnology or IntegrationTesla Powerwall Certified Installer providing installation services for Tesla battery storage products.
• Enphase EnergycoreTechnology or IntegrationCertified installer and partner for Enphase microinverter systems and battery storage solutions.
• GeneraccoreTechnology or IntegrationCertified installer for Generac generators and PWR Cell battery systems.
• Briggs & StrattoncoreTechnology or IntegrationExclusive dealer for Briggs & Stratton PowerProtect home standby generators running on natural gas or propane.

Scale indicators2 records

Recent moves6 records

Expansion highlights4 records

Direct peers

• Trinity Solar: One of the largest privately held residential solar installers in the U.S., headquartered in New Jersey. Closely comparable as a family/privately rooted regional installer serving homeowners with rooftop solar, battery storage, and backup power.
• Freedom Forever: National residential solar and battery installer with a regional-branch operating model. Directly comparable on the design-install-serve homeowner value proposition that GTRE offers, though at materially larger scale.
• ADT Solar: Residential solar installer serving U.S. homeowners with rooftop PV and battery solutions. Comparable direct-to-consumer installer model targeting similar customer pain points (energy cost, backup power, home electrification).
• Lumio: Regional residential solar installer in the Midwest with a similar full-service solar-plus-storage offering. Comparable in scope of products and customer segment, with overlap in third-party hardware partnerships.

Regional players

• ReVision Energy: Employee-owned residential and commercial solar installer serving New England. Comparable as a mission-driven, regionally focused installer with solar, battery, EV charging, and heat pump offerings mirroring GTRE's portfolio.

Broad incumbents

• Sunrun: Largest U.S. residential solar, battery, and energy services company with national scale. Competes for the same homeowners with solar + Powerwall-like offerings, but operates a financed/PPA business model rather than direct cash sale.
• Tesla Energy: Sells and installs Tesla Solar Roof, retrofit solar, and Powerwall directly and through a certified installer network (which GTRE is part of). Comparable on hardware (Powerwall) and end-customer use cases, but at vastly different scale.
• SunPower: National U.S. residential solar and storage provider offering design, installation, and financing. Comparable on homeowner solar + battery product mix, but competes at a national scale GTRE does not.

Others

• Enphase Energy: Leading manufacturer of microinverters and battery storage systems. GTRE is a certified Enphase installer and supports Enphase monitoring apps; Enphase is an ecosystem/technology peer rather than a direct competitor.
• Generac: Largest U.S. manufacturer of backup generators and PWR Cell battery systems. GTRE is a Generac Certified Installer and exclusive Briggs & Stratton dealer; comparable as a supplier/enabler within GTRE's product stack rather than a channel competitor.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/greenetechenergy
• LinkedInlinkedin.com/company/greene-tech-renewable-energy-llc

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about GTRE