As global demand for deep-sea
energy, surveillance, and
infrastructure expands, the
subsea technology market is
undergoing a transformation.
Subsea power systems must
evolve to support more
autonomous platforms, operate
at greater depths, and reduce
emissions—while remaining
compact, efficient, and fail-safe.
SubCtech, founded in 2010 by
applied physicist Stefan Marx, has
positioned itself as a global
leader in advanced underwater
energy solutions. Based in Kiel,
Germany, SubCtech specialises in
subsea power ands batteries
custom engineering, and rigorous
prototype validation for a wide
range of subsea applications.
With a growing team and
expanding global reach, the
company delivers smart, field-
tested systems that reduce
CAPEX, OPEX, and CO₂
emissions—a win for industry,
security, and sustainability.
AUVS, OFFSHORE ASSETS &
OCEAN MONITORING
SubCtech’s Ocean Power product
line includes lithium-ion battery
systems, energy storage
solutions, and telemetry tools
built for:
● Offshore Oil & Gas CCS
● Environmental monitoring
● Autonomous and remotely
operated vehicles (AUVs, ROVs,
USVs)
At the core of this portfolio is the
INNOVATIVE AND SUSTAINABLE TECHNOLOGIES FOR THE
RAPIDLY-GROWING UNDERWATER MARKETS
DEEP SEA ENERGY
Battery Storage Skid lifted into ocean by support vessel for
first deployment
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