SubCtech develops and manufactures lithium-ion battery systems and measurement systems for maritime applications and the offshore industry.
SubCtech GmbH
KielNew on Amplifa
About SubCtech
SubCtech GmbH, based in Kiel, develops and produces maritime technologies in two business divisions: Ocean Power and Ocean Monitoring. In the Ocean Power division, the company manufactures lithium-ion battery systems for AUVs, ROVs, UPS applications and offshore subsea projects in the oil and gas industry, including custom batteries, energy storage systems and charging technology. In the Ocean Monitoring division, SubCtech produces autonomous underway measurement systems (FerryBox), including for pCO2 measurements, as well as optical CO2 analyzers with automatic calibration to SOCAT standard, subsea loggers, samplers and nutrient analyzers. The products range from compact 19-inch instruments to complete rack systems and are used in marine research, oceanography, marine and environmental monitoring, and offshore industrial projects. With over 15 years of experience and a flexible R&D department, the company implements customer-specific solutions including qualifications to standards such as API17F, MIL-STD, UN T38.3 and DNV-GL. Since September 2025, SubCtech has been part of Gabler Maschinenbau GmbH within the Possehl Group.
- Site
- Kiel
- Processes
- Custom Batteries, Consulting, Custom Solutions / R&D
- Materials
- Lithium-Ion
- Certificates
- API17F, MIL-STD, UN T38.3, DNV-GL
- Industries
- Maritime Research, Oceanography, Marine and Environmental Monitoring, Offshore Oil & Gas
- 01
Engineering / R&D
- 02
System Development & Configuration
- 03
Manufacturing & Assembly
- 04
Testing & Qualification
- 05
Sales & Service
Materials & Processes
Lithium-Ion
Cell technology for subsea, AUV, ROV and UPS battery systems as well as energy storage systems.
Sites
Kiel
DEHeadquarters
- Materials
- Lithium-Ion
Products
Inside the production
Industries
Additional services
Quality & Standards
SubCtech offers qualifications to standards such as API17F, MIL-STD, UN T38.3 and DNV-GL as well as optical CO2 analyzers with automatic calibration to SOCAT standard.
| Evidence | Kiel |
|---|---|
| API17F | |
| MIL-STD | |
| UN T38.3 | |
| DNV-GL |
History
- 2025
Acquisition of SubCtech GmbH by Gabler Maschinenbau GmbH (Possehl Group) in September 2025.
- 2026
Relocation to the new headquarters at Fraunhoferstraße 17 in Kiel (May 2026).