Marine Energy & Engineering

Atlantique Offshore Energy, Chantiers de l’Atlantique Business Unit dedicated to Marine Energies

We are specialized in tailor-made solutions for specific Engineering or turnkey EPCIM projects (Engineering, Procurement, Construction, Installation and Maintenance), with a focus on Electrical Offshore Substations (AC or DC, bottom-fixed or floating) for Offshore Windfarms. We benefit from major competitive assets to answer our customer’s expectations worldwide: expert teams in design and production of marine installations, Project Management capabilities focusing on safety, quality and delivery times, decades of know-how as technology integrator, and large industrial and logistical capacities with direct access to the open sea.

3.2 GW of Renewable Energy are currently connected to the Grid thanks to the Electrical Offshore Substations we already designed, constructed and commissioned.

A selection
of references

Atlantique Offshore Energy has many references demonstrating its ability to successfully deliver turnkey projects fulfilling its clients’ needs, whether it is related to Marine Renewable Energy, most notably Electrical Offshore Substations for Offshore Windfarms, or to the Oil & Gas Industry.


Following its first achievements, Atlantique Offshore Energy was selected to design, manufacture and commission the Electrical Offshore Substations of the French Offshore Windfarms and continues its success story in Europe.

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Electrical substation for the Parc
du Banc de Guérande

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Substation for the Fécamp offshore wind farm

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Substation for Gode Wind 3 offshore wind farm

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Substation for the Wind Farm off the Coast of Calvados

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A continuous
innovation process

Leader in the execution of turnkey projects, Atlantique Offshore Energy is also engaged in a continuous innovation process.

As a result of this approach, SeeOs modular and scalable Electrical Offshore Substation concept has been certified by the classification society DNV-GL.

This substation is scalable in accordance with our customers’ needs and adaptable in terms of technical features (power output, number and type of electrical equipment etc.) or location (floating or bottom-fixed foundation for instance).

Our innovation process Our Fields of Expertise
Focus on

SeeOs, scalable solution of offshore electrical substations

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Dedicated Skills and Tools

Atlantique Offshore Energy benefits from decisive assets in order to meet its clients’ expectations:

  • Teams of experts in every necessary domain, from the design to the maintenance of offshore installations
  • An extensive experience in project management with attention to safety, quality and delivery time
  • A proven expertise in terms of technology integration
  • Significant industrial and logistical capacities with a direct access point to the open sea and a production capacity of two to three substations per year:
  • A 307 x 23 m (1,007 x 75 ft) pre-manufacturing workshop with one 50tgantry crane and special tools
    • A 120 x 35 x 15 m (393 x 115 x 50 ft) assembly workshop with two 60 ft gantry cranes.
    • A 6,000 m² (7,175 yd²) pre-assembling area.
    • A 50 x 35 x 22 m (165 x 115 x 72 ft) painting workshops

A question? A project?

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