Best Energy Tech Companies in Tennessee, United States
The 43 best Energy Tech companies in Tennessee, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: BlueOval SK.
Our analysis of 79 Energy Tech companies
$38.9b in tracked funding; 92% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Energy Tech companies in Tennessee
| # | Company | Disclosed funding | Last round | Stage | Founder | Founded | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | BlueOval SK Manufacturer of lithium-ion batteries designed for electric vehicle applications 42Partners top 32%Funding top 33%Tech top 33%Talent top 38% All 8 signals ▾Partnerstop 32% Fundingtop 33% Techtop 33% Talenttop 38% Newstop 39% Growthtop 50% Marketbottom 34% Globalbottom 25% Partners: 2 partnership announcements in 12 mo (3 in 24 mo) Funding: Raised $9.2B across 1 rounds · 1 rounds over 3 yrs (0.3/yr) rank vs industry peers · Fliar Intelligence Index 42/100 | $9.2B | 37 mo ago | Funding Raised | Michael Adams Co-CEO | 2022 | Cart FunctionalitySquarespace CommerceSquarespace+17 | — | — |
| 2 | FirstFuel Energy use intelligence | $44M | 109 mo ago | Acquired | — | 2011 | — | — | — |
| 3 | Whisper Aero Developer of electric propulsion systems for aviation, defense, and commercial sectors | $40M | 16 mo ago | Series A | Mark Moore Co-Founder & CEO | 2021 | WebflowApple iCloud MailMicrosoft 365+9 | 105 patents Advanced aerodynamic fan, blower, and exhaust flow control systems for aircraft propulsion. | 1 partnership |
| 4 | Microporous Manufacturers of battery separators 53Funding top 31%Product top 32%Tech top 34%Growth top 43% All 10 signals ▾Fundingtop 31% Producttop 32% Techtop 34% Growthtop 43% Patentstop 50% Innovationbottom 49% Moatbottom 49% Marketbottom 47% Globalbottom 36% Newsbottom 20% Funding: Raised $23.0M · 2 rounds over 13 yrs (0.2/yr) Product: 3 distinct product lines · Company stage: Acquired rank vs industry peers · Fliar Intelligence Index 53/100 | $23M | 3 mo ago | Acquired | — | 1934 | WordPress Block EditorElementorWordPress+28 | 11 patents Advanced battery separators reducing acid stratification and enhancing charge acceptance via lignosulfonate/carbon coatings | 1 expansion |
| 5 | LeMond Manufacturer of electric-bicycles | $12M | 106 mo ago | Funding Raised | — | 1986 | Cart FunctionalityShopifyShop Pay+24 | — | — |
| 6 | Evermind Plugs for monitoring the elderly | $11M | 130 mo ago | Deadpooled | — | 2012 | — | 5 patents Digital mental‑health therapeutics and passive physiological monitoring devices | — |
| 7 | Stone Mountain Technologies Provider of heat pumps | $10M | 22 mo ago | Series B | — | 2010 | WordPressMySQLPHP+25 | 36 patents Advanced control and integration of sorption and hybrid heat pump heating systems | — |
| 8 | EkWateur Supplier of renewable electricity and natural gas | $4M | 76 mo ago | Series A | — | 2015 | PrismicApple iCloud MailNode.js+26 | — | — |
| 9 | Shift Thermal Provider of ice thermal energy storage solutions for HVAC systems | $3M | 13 mo ago | Seed | Levon Atoyan Co-Founder | 2017 | — | — | — |
| 10 | Electro-Active Technologies Technology solutions provider for converting organic waste to fuel | $2M | 82 mo ago | Seed | Abhijeet P Borole Co-Founder | 2017 | — | — | — |
| 11 | Solar Site Design Solar project development platform | $550K | 104 mo ago | Seed | Jason Loyet Founder | 2013 | — | — | — |
| 12 | SecondKeys Online solution to file property maintenance requests | $260K | 38 mo ago | Seed | Marterrious Mcclain Co-Founder & CTO | 2018 | — | — | — |
Top 12 Energy Tech companies in Tennessee
#1
Acquired · Piney Flats, Tennessee · founded 1934 · 150 employees$23Mraised▾
Microporous is a highly specialized manufacturer of battery separators for flooded lead acid batteries. These battery separators are used by battery manufacturers for applications such as golf car batteries, forklift batteries, standby power, and Starting Lighting and Ignition (“SLI”) batteries for automotive, truck and bus. Microporous currently operates two plants, one in Piney Flats, Tennessee, and one in Feistritz, Austria
#2
Series A · Crossville, Tennessee · founded 2021 · 25 employees$39.5Mraised▾
Developer of electric propulsion systems for aviation, defense, and commercial sectors. The company focuses on creating quieter, more efficient, and scalable electric engines. These engines are designed for use in aircraft, drones, and other applications. The company aims to provide solutions that reduce noise and improve performance.
- Apr 2025Grant (prize money)$500K
- Apr 2023Series A$32M
- Aug 2021Series A$7.5M
#3
Funding Raised · Brownsville, Tennessee · founded 2022$9.2Braised▾
Manufacturer of lithium-ion batteries designed for electric vehicle applications. The company focuses on developing battery technologies for cleaner transportation. Its batteries are designed for safety, high efficiency, and high capacity. The batteries aim to enable faster charging and longer travel distances for electric vehicles.
- Jun 2023Conventional Debt$9.2B
#4
Seed · Oak Ridge, Tennessee · founded 2017 · 8 employees$2.5Mraised▾
Provider of ice thermal energy storage solutions for HVAC systems. It provides an innovative heat exchanger called IHEX, which is used in ice thermal energy storage applications.
- Jul 2025Seed$1M
- Jun 2020Grant (prize money)$1.3M
- Feb 2019Grant (prize money)$224.9K
#5
Series B · Piney Flats, Tennessee · founded 2010 · 19 employees$9.5Mraised▾
Provider of heat pumps. It provides products such as gas heat pump, air handling unit, indirect storage tank, and more. It provides gas absorption heat pumps for residential and light commercial applications.
- Oct 2024Series B$14.5M
- Jul 2010Grant (prize money)$2.7M
#6
Acquired · Lexington, Tennessee · founded 2011 · 94 employees$43.9Mraised▾
FirstFuel Software offers building-wide energy analytics that help utilities and government agencies deliver energy efficiency across commercial building portfolios. Using only electric interval meter data and a building address, FirstFuel produces a remote set of building-specific performance benchmarks and custom recommendations that utilities and government agencies can provide to building operators – without the use of onsite assessments or device installations. Customers include E.ON, Southern California Edison (SCE), the U.S. Gov. and DOD.
- Jul 2017Series D—
- Apr 2015Series C$23M
- Dec 2014Series B$8.5M
- Feb 2012Series A$10M
#7
Funding Raised · Knoxville, Tennessee · founded 1986 · 23 employees$12.1Mraised▾
Manufacturer of electric-bicycles. The company develops various models of electric bicycles like Prolog, Dutch, and Road. It offers features like carbon-fiber body, 11-speed drive train system, 250w motor, integrated headlight, variant colors, and more. Also, it offers mobile applications for riders which are available for both Android and iOS platforms.
- Oct 2017Grant (prize money)$3.9M
- Feb 2017Conventional Debt$4.8M
- May 2016Conventional Debt$3.3M
#8
Deadpooled · Nashville, Tennessee · founded 2012 · 5 employees$10.6Mraised▾
Plugs for monitoring the elderly. It keeps track of activities such as a device being switched on/off and sends text messages or email notifications throughout the day and alerts when variations are noticed. The sensors are simply plugged into any AC outlet and the appliance being used is plugged into it. When appliances are switched on and off, the solution sends information to a dedicated network via the built-in wireless internet.
- Oct 2015Series B$5.1M
- Feb 2015Series A$3.7M
- Aug 2012Seed—
- Series A$1.8M
#9
Series A · Paris, Tennessee · founded 2015 · 127 employees$3.8Mraised▾
Supplier of renewable electricity and natural gas
- Apr 2020Series A$1.6M
- Jan 2017Series A$2.1M
#10
Seed · Memphis, Tennessee · founded 2018 · 5 employees$260Kraised▾
SecondKeys is an online solution to file property maintenance request. The company offers a web-based platform and a mobile app where tenants can register and file requests for maintenance issues. Multi-family property owners/property managers can view these requests and communicate over the platform.
- Jun 2023Seed—
- Jun 2019Seed$260K
- May 2018Seed—
#11
Seed · Knoxville, Tennessee · founded 2017 · 10 employees$1.5Mraised▾
Technology solutions provider for converting organic waste to fuel. It provides modular systems to produce hydrogen from organic waste. Claims to be using a microbial and electrochemical process to degrade organic waste.
- Oct 2019Seed$1.2M
- Mar 2019Seed$250K
#12
Seed · Nashville, Tennessee · founded 2013 · 5 employees$550Kraised▾
Developer of a cloud-based marketplace platform designed to connect solar project referrals with solar companies to drive down customer acquisition costs. The company's platform gathers and instantly shares information about solar projects with stakeholders to help in understanding the soft costs that include installation, customer acquisition, and permits, enabling businesses to gather data, collaborate, and streamline solar development to create a quote.
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Energy Tech coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
How research on Energy Storage in Tennessee is moving
A read on the academic research around Energy Storage in Tennessee — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 69 papers.
- University of Tennessee at Knoxville53
- Tennessee Technological University10
- University of Tennessee at Chattanooga6
- University of Tennessee Health Science Center1
- University of Tennessee System1
- Electrochemistry7
- Electrolyte6
- Anode5
- Battery (electricity)4
- Cathode4
- Battery (electricity)1→10
- Photovoltaic system1→4
- Battery (electricity)3
- Nanotechnology3
- Renewable energy2
- Electronics2
- Power electronics1
Common questions
Rohit lives in the feed. He covers what's moving right now — the funding rounds, launches and shifts breaking across the trade press — and ties them back to where the sector is heading.