Page 31: of Marine Technology Magazine (Sep/Oct 2026)

SubCtech GmbH is a ma- and acceptance testing of complete subsea power systems rine technology company and underwater energy storage solutions.

headquartered in Kiel, spe- SubCtech has recently expanded its activities in the subctech.com cializing in subsea power growing market for autonomous underwater systems and energy storage solutions for underwater vehicles and by delivering lithium-ion battery solutions for large and offshore infrastructure. Founded in 2010, the company extra-large AUV platforms. In parallel, the company has develops and manufactures advanced lithium-ion battery advanced its subsea Energy Storage System (ESS) tech- systems, subsea UPS solutions, integrated energy stor- nology and integrated subsea backup and docking solu- age systems for demanding underwater applications and tions that enable long-duration autonomous underwater monitoring systems. Today, SubCtech serves customers operations with minimal vessel support.

worldwide in the offshore energy, scienti? c, defense and In 2026, SubCtech moved into its new headquarters at the marine technology sectors. The company’s products are Kiel Science Park. The new facility consolidates all compa- designed for long-term operation in harsh environments ny activities into one location and provides approximately and are deployed in water depths of up to 6,000 meters. four times the combined production and of? ce space of the

SubCtech operates dedicated facilities for lithium-ion previous sites. The site includes engineering of? ces, manu- battery assembly, electronics manufacturing, system in- facturing and assembly areas, testing facilities, logistics in- tegration, pressure and leak testing, battery testing and frastructure, and training and collaboration spaces.

validation, environmental testing, and subsea system All systems are developed and manufactured in Germany commissioning. The company also maintains specialized and can be customized and quali? ed to meet customer re- equipment for quali? cation testing, charger integration, quirements, including API, DNV, MIL and UN standards.

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