SEM-REV, Offshore multi-technology test site

SEM-REV is Centrale Nantes' offshore test site. It has all the equipment on- and off-shore required to develop, under operational conditions, marine energy recovery systems - mainly from offshore wind and wave. It will play a decisive role in developing this new industrial sector in France.


  • Provide a dedicated site for technology installation and operations. 
  • Manage the resale of electricity produced by the prototypes tested.
  • Store or redistribute electricity for off-grid projects
  • Provide access to offices and data (meteorological / oceanographic and control devices) for test supervision.
  • Maintenance of equipment and tools under operational conditions.
  • Links with local marine stakeholders (users of the sea, state services, operators, marine authorities etc) and local players in the value chain (construction, installation, operation, sensors etc).
  • Environmental impact assessment for both the test site and the devices.

Equipment and tools

  • Land station: research centre and electrical substation.
  • Export cable: 20kV and 24 fibre optics.
  • 1km² restricted and marked area.
  • Subsea termination units, for three simultaneous connections.
  • Met-Ocean instrumentation (wind, wave and current).

SEM-REV Characteristics

  • Water depth: 32 m to 36 m LAT
  • Seabed: Sand (0.2-0.5 mm)
  • Export cable: 8MVA – 20 kv
  • 3 test slots: 24 optical fibers
  • Wave: 3 Datawell buoys
  • Current, tide: 2 ADCP systems
  • Wind: 2 meteo-buoys
  • Tidal range: 6.2 m
  • Max tidal current (10years): 0.7 m/s
  • Mean wave energy: 12 kW/m
  • Extreme Hs (10years): 8.3 m
  • Extreme Hs (50years): 9.6 m
  • Mean wind velocity: 7.5 m/s (1h, 10m)
  • Extreme wind (50years): 29 m/s (1h, 10m)

Learn more about SEM-REV:

Published on June 4, 2018 Updated on May 9, 2022