Mr. Stefan Marx

Dipl.-Phys. & Managing Director, SubCtech GmbH


Graduate physicist and marine engineer StefanMarx, founder and owner of SubCtech GmbH, has been going to sea regularly since1983. Between 1987 and 1993 he began developing the first autonomous 2000 m float at the Institute for Applied Physics/Marine Technology in Kiel. From 1993to 1998, Stefan was responsible for the development, construction and operation of the MARNET North Sea and Baltic Sea measuring network at the GKSS Research Center (today Hereon) near Hamburg. The MERMAID system was awarded the EU Lillehammer Prize in 2003. Between 1999 and 2006, as head of a marine technology office in Kiel, Stefan Marx developed products such as the FerryBoxand autonomous buoy systems.

In 2006 Stefan co-founded Contros GmbH. The goal was to develop own underwater gas sensors and Li-Ion batteries for offshore oil and gas. In the same year, the KERN start-up prize was awarded first place. In 2008 the first large AUV battery was delivered.

The spin-off of SubCtech GmbH in early 2010 was synonymous with the new focus on scientific pCO2 analyzers and industria lLi-ion battery systems. In 2013, Stefan Marx was awarded the Franco-German-Business Prize in Paris alongside Daimler, Renault and others.

As a maritime expert, he worked as a consultant for numerous companies, e.g. for the Fraunhofer Gesellschaft on the TIETEK AUV project, in the NATO Industrial Advising Group 126 to equip sensors in AUVs, for US offshore companies, for the World Bank in the South Sinai Development Project and for several EU and university projects.

With 51 employees, SubCtech is now a leading manufacturer of Li-Ion batteries for autonomous vehicles, but also for subsea energy production. The second business unit includes maritime monitoring for environmental gases such as CO2 and microplastic samplers.




www.subCtech.comwww.subCtech.comSubseaLi-Ion batteries for safe, cost-effective and sustainable offshore energyproduction and autonomous vehicles

The two major battery markets of under water energy production and autonomous vehicles are undergoing global changes. The focus is on maximum product safety, but also maximum reliability and cos treduction.

SubCtech has steadily expanded its productrange for all-electric applications as well as for vehicles.

Converters are increasingly being integrated into the battery for energy production in order to implement an AC supply, but also an AC output.

The well-known Li-Ion batteries for vehicles are modified as energy storage canisters in skids with 1 MWh each and interconnected to form an ESS with a total of 7 MWh. All subsea systems are qualified according to API17F.

The vehicle batteries can also be operated at docking stations such as Blue Logic inductive charging systems.

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