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HEIONTEC at a Glance
HEIONTEC is developing an innovative energy harvesting technology that converts ambient heat into electrical energy. The technology is based on thermo-electrochemical generator cells (TEC-G cells), designed to provide self-sustaining power for sensors and other ultra-low-power devices. Behind the HEIONTEC brand is HEIONIT GmbH, a deep-tech company headquartered in Schleswig-Holstein with its own development laboratory in Lohmar, North Rhine-Westphalia. The technology is advancing from laboratory validation toward scalable manufacturing and real-world applications. To this end, HEIONTEC is collaborating with industry and research partners on cell manufacturing, system integration, and scaling.
Company: HEIONIT GmbH
Brand: HEIONTEC
Industry: Deep Tech / Energy Harvesting
Application Focus: Sensors and Ultra-Low-Power Systems
Year Founded: 2022
Locations: Schleswig-Holstein and Lohmar (North Rhine-Westphalia), Germany
Website: www.heiontec.com
PRESS RELEASES
News from HEIONTEC
October 5, 2026
HEIONTEC on “Die Höhle der Löwen”: Deep tech from Schleswig-Holstein in front of an audience of millions
HEIONTEC is showcasing its technology for generating energy from ambient heat on “Die Höhle der Löwen.” Since the show was recorded, the company has continued to advance its technological development and industrialization efforts and has recently received two awards.
July 9, 2026
HEIONTEC and Celtrix Launch Strategic Partnership to Manufacture Innovative Energy Cells
HEIONTEC and Celtrix are combining their efforts in technology development and cell manufacturing to gradually advance TEC-G technology toward reproducible prototypes and industrial-scale manufacturing.
IMAGES
High-Resolution Images
Usage Note: The images provided here may be used exclusively for editorial coverage of HEIONTEC. Any other use is permitted only with express authorization.
HEIONTEC Pouch Cell
Image Credit: © HEIONTEC / HEIONIT GmbH //
AI-generated illustration. Does not depict an actual TEC-G cell.
HEIONTEC PRESS COVERAGE
Selected Media Reports
WDR Lokalzeit | Electricity from Ambient Heat: HEIONTEC in the Lab (German)
WDR is following the HEIONTEC team as they work on development and provides insights into the technology, cell construction, and potential applications of the TEC-G.
General-Anzeiger Bonn | How Two Inventors Turn Ambient Heat into Electricity (German)
The General-Anzeiger reports on the research behind HEIONTEC and the development of a technology for generating electricity from ambient heat.
RTL / VOX | Investor Controversy on German TV Show “Die Höhle der Löwen” (German)
HEIONTEC showcased its technology for generating electricity from ambient heat on the German startup TV show “Die Höhle der Löwen.”
Lübecker Nachrichten | HEIONIT Wins the Lübeck Business Innovation Award (German)
The Lübecker Nachrichten reports on HEIONIT being awarded the 2026 Innovation Prize. The article highlights the TEC-G technology for generating energy from ambient heat, as well as the combination of scientific research, patented technology, and significant application potential.
TECHNICAL ARTICLES ON HEIONTEC
Research & Technical Publications
Hochschule Düsseldorf 2026 | Thermo-Electrochemical Generator Cells (TEC-G/TREC)
Lecture notes by Prof. Jens Bockstette of Düsseldorf University of Applied Sciences, covering the fundamentals of thermo-electrochemical generator cells, including a dedicated case study of HEIONTEC's technology.
PSMA Update 2026 | HEIONTEC turns ambient heat into power for ultra-low-power electronics
The Power Sources Manufacturers Association highlights HEIONTEC's thermo-electrochemical generator technology and its potential to provide a self-sustaining power source for wireless sensors.
EnerHarv 2026 | Conference Poster
HEIONTEC presented its TEC-G technology at the international energy harvesting workshop EnerHarv 2026 in Madrid. According to PSMA, the official proceedings are scheduled to be made publicly available in Q1 2027.
Presented at EnerHarv 2026, Universidad Politécnica de Madrid, May 27–29, 2026
