GTRE
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.
- Company typePrivate
- Founded1963
- HeadquartersJohnson City, United States
- Headcount11–50
- GTM typeB2C
- OfferingServices
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).
GTRE firmographics
Firmographics- 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
GTRE industry classification
Industry- 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
Where GTRE is headquartered
LocationHeadquarters
- HQ city
- Johnson City
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
GTRE business model
Business model- GTM type
- B2C
- Offering type
- Services
- Cost components
- Personnel, Supply Chain, Operations, Marketing or Sales, Technology or R&D
Revenue model
- 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.
- 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.
- Wind Turbine Systems: Residential wind turbine installation using Bergey and Bornay products for customers with suitable wind sites.
- Micro Hydro Systems: Micro hydro power generation for properties with flowing water sources. PowerSpout systems for water-to-energy conversion.
- Fuel Generators: Propane and gas-powered generators from Briggs & Stratton and Bladon for backup power, standalone or combined with solar systems.
- Service and Maintenance: Service calls, repairs, and maintenance for solar and renewable energy systems. 5-year service warranty on GTRE-installed systems.
- Home Energy Optimization: SPAN smart panels, SANCO2 heat pump water heaters, Level 2 EV chargers, and energy management systems for home electrification.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Unit Pricing | Pay-as-you-go | Off-Grid Systems - Complete Energy Independence |
| Unit Pricing | Pay-as-you-go | Grid-Tied with Battery Backup |
| Unit Pricing | Pay-as-you-go | Partial Backup - Essential Circuits |
| Unit Pricing | Pay-as-you-go | Backup Power Only |
Go-to-market motion1 record
Distribution channels2 records
Marketing channels4 records
GTRE product offering
Product offeringCore 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
Companies that use GTRE
Customer profileNamed customers1 record
Segments2 records
Ideal customer profiles2 records
GTRE technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration1 record
Feature1 record
GTRE partnerships and signals
Strategic signalPartnerships
Five partnerships are on record, tiered core.
- SolarEdgecoreCertified installer and partner offering SolarEdge inverters and monitoring systems. GTRE provides installation, service, and troubleshooting for SolarEdge systems with support for MySolarEdge app monitoring.
- TeslacoreTesla Powerwall Certified Installer providing installation services for Tesla battery storage products.
- Enphase EnergycoreCertified installer and partner for Enphase microinverter systems and battery storage solutions.
- GeneraccoreCertified installer for Generac generators and PWR Cell battery systems.
- Briggs & StrattoncoreExclusive dealer for Briggs & Stratton PowerProtect home standby generators running on natural gas or propane.
Scale indicators2 records
Recent moves6 records
Expansion highlights4 records
GTRE competitors and assessment
Company assessmentDirect 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
GTRE social profiles
Digital presenceGTRE compliance and trust
Trust signalCompliance1 record
GTRE financial estimates
Financial estimateRevenue estimate
Valuation estimate
GTRE leadership team
Management profileNumber of profiles
Profiles1 record
GTRE funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
GTRE M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about GTRE
What does GTRE do?
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.
Is GTRE a public or private company?
GTRE is a private company. It is classified as family owned and is currently operating.
When was GTRE founded?
GTRE was founded in 1963. It employs 11 to 50 people.
Where is GTRE based?
GTRE is headquartered in Johnson City, United States, in the North America region.
How does GTRE make money?
Seven revenue lines are on record. Solar PV Systems are the primary driver. The others are battery Storage Systems, wind Turbine Systems, micro Hydro Systems, fuel Generators, service and Maintenance and home Energy Optimization.
Who are GTRE's main competitors?
Direct peers on record are Trinity Solar, Freedom Forever, ADT Solar and Lumio. ReVision Energy is listed as a regional player. Broad incumbents are Sunrun, Tesla Energy and SunPower. Others are Enphase Energy and Generac.
Does GTRE have an API?
No public API is recorded for GTRE.
What industry is GTRE in?
GTRE's product category is Solar and Renewable Energy Installation Services. Its primary akta.pro industry code is EUAMAGAB, Distributed & Commercial Renewable O&M (Rooftop Solar, C&I Wind, Small Hydro), with a secondary code of EUAMAJAE, Distributed Storage (Behind-the-Meter Batteries). Its NAICS code is 22111.