SubCtech GmbH
Booth number: 13651
subctech.com
About us
SubCtech is a leading German technology company specializing in advanced subsea energy storage systems and autonomous underwater technologies. Headquartered in Kiel, Germany, we develop and manufacture high-performance lithium-ion battery systems, subsea backup power solutions, and integrated energy storage systems for offshore energy, marine research, defense, and autonomous underwater vehicles (AUVs).
Our portfolio ranges from compact battery packs for small AUVs to large-scale subsea energy storage systems (ESS) with capacities in the megawatt-hour range. Designed for the most demanding underwater environments, our solutions enable longer mission durations, increased operational reliability, and reduced maintenance requirements.
Beyond energy storage, SubCtech provides intelligent Battery Management Systems (BMS), charging and docking solutions for autonomous underwater systems, and customized engineering services tailored to specific customer requirements.
With decades of experience in subsea technology, in-house engineering and manufacturing, and a strong commitment to innovation, quality, and safety, SubCtech supports customers worldwide in advancing sustainable offshore operations and the next generation of autonomous marine systems.
Core Competencies
Subsea lithium-ion battery systems
Large-scale subsea Energy Storage Systems (ESS)
Battery systems for AUVs, ROVs and unmanned marine systems
Subsea backup power solutions
Smart Battery Management Systems (BMS)
Charging and docking solutions for autonomous underwater vehicles
Custom-engineered subsea power solutions
Address
Fraunhoferstr. 17
24118 Kiel
Germany
E-mail: info@subctech.com
Phone: +49 4312 2039880
Internet: www.subctech.com
Contact person:
Sören Johannsen
E-mail: soeren.johannsen@subctech.com
Products & Services
SubCtech provides advanced subsea and offshore technology solutions for ocean monitoring, underwater power supply and subsea energy systems. Our portfolio includes autonomous and long-term monitoring systems, sensor platforms, subsea batteries and power solutions, as well as systems for leak detection, critical infrastructure monitoring, AUV charging and offshore backup power.
We deliver robust, field-proven solutions for demanding offshore environments, supporting customers in the energy, offshore, maritime, research and defence sectors. SubCtech combines engineering, system integration and project-specific development to provide reliable solutions from concept to deployment and operation.
Energy Storage Systems
High-Performance, highly reliable and high-safety Li-ion Energy Storage System (ESS) for offshore subsea applications. Designed for deployments of up to 25 years, the ESSs are typically used as backup system integration acting as your offshore renewable energy source. The batteries of the ESS are fully API17F qualified and certified to UN T38.3. The subsea skids are qualified accordingly.
Typical applications for our Energy Storage Systems:
• Backup energy source for offshore applications with high energy demands (>1 MWh)
• At Oil & Gas production facilities to ensure that critical control systems and sensors are continuously powered
Vehicle Batteries
Rechargeable Li-ion batteries modularly divided into SmartPowerBlocks™ (SPBs bring highest capacity and combine safety, reliability and low weight. These batteries are available in three different standard diameters: 260mm, 310mm, 416mm (dimensions without pressure housing). They are partly type-qualified according to MIL-STD, API17F or international standards. The batteries can be qualified to UN T38.3 upon request.
Typical applications for our Vehicle Batteries:
• Underwater vehicles: AUV, ROV, submarines
• Surface vehicles: USV, boats
• Underwater equipment: monitoring stations
• Smart sensor power supplies
We offer COTS (Commercial Off The Shelf) and customised battery solutions. Increased safety is achieved by dividing the battery into self-protected SmartPowerBlocks™ (SPB) modules with their own BMS protection. We only use industrial 18650 cells with the highest energy density, which themselves have extensive protection such as overpressure valves, overcurrent and temperature protection, housed in stainless steel shells. In contrast to pouch cells / Li-Pol cells e.g. used for pressure-neutral batteries, these batteries can be certified and undergo shock and vibration tests, e.g. in accordance with MIL-STD or API17F.
As a manufacturer of corrosion-free and lightweight titanium 1 atm pressure housings (not oil-filled), the batteries are easily scalable with low weight under water. The battery is easy to install (self-supporting) and has a low cable count. This saves buoyancy and thus considerable costs, simplifies the system design and offers extremely high safety even under rough sea and shipboard conditions.
Subsea Batteries
High-Performance, highly reliable and highest-safety Li-ion rechargeable battery for offshore subsea electronics. With a design life up to 25 years, the batteries are qualified according to API17F, international or company specific standards. The batteries can be additionally qualified to UN T38.3 upon request.
Typical applications for our Subsea UPS:
• All-Electric Systems
• At energy production facilities to ensure that critical control systems and sensors are continuously powered
• Long-tiebacks
• CCS (Carbon Capture and Storage)
• Underwater Monitoring Systems for open water and wells
We offer a wide range of COTS (Commercial Off The Shelf) and customised battery solutions.
