Offshore Interconnectors

Offshore interconnectors are a vital infrastructure that enable the transmission of electricity between regions and countries, supporting energy security, decarbonisation, and market integration.

OWC applies its profound offshore wind expertise to interconnector projects, offering tailored technical advisory and engineering services across the full lifecycle — from planning and early stage engineering to operations and maintenance.

Jeff Fodiak

Jeff Fodiak

Offshore Director, Americas

Market challenges

Effective interconnector development requires overcoming a range of technical and environmental challenges such as grid integration, engineering complexity, reliability requirements, and installation obstacles & logistics.

Our Solutions

OWC provides a comprehensive suite of services for interconnectors and transmission projects:

  • Technical Advisory & Owner’s Engineering
  • Geoscience Survey Planning & Ground Modelling
  • Metocean Survey Planning & Weather Downtime Analysis
  • Electrical System Design & Power Systems Analysis
  • Cable Route & Landfall Selection
  • Planning And Permitting Support
  • Cable Installation Engineering Including Cable Burial Risk Assessment (CBRA) And Burial Assessment Study (BAS)
  • Hvdc OE Support
  • Procurement Documentation & Evaluation
  • Technical Due Diligence
  • Substation Engineering
  • CAPEX & OPEX Cost Modelling
  • Market And Regulations Analysis
  • Cable Maintenance & Integrity Studies
  • Cable Repair Studies
  • Offshore Client Representatives
  • Marine Warranty Surveying

The value we bring

60+ interconnector and offshore transmission projects

125+ cable engineering projects

100+ GW of renewable capacity supported

Global footprint with 21 offices and 200+ consultants

Proven track record in Owner’s Engineering and Technical Due Diligence

Integrated multi-disciplinary engineering teams

Questions? Get in touch

Engineering

Engineering

Utilise decades of renewable energy engineering experience in your next project. We’re focused on delivering, operating, and financing your energy projects at a competitive price point.
Substation on calm sea

Electrical Engineering

As experts in offshore wind, we provide engineering and consulting services throughout the offshore wind project lifecycle. However, our primary focus areas lie within the development and pre-construction phase. 
WTG Engineering

WTG Engineering

INNOSEA is a leading global specialist in wind turbine generator (WTG) engineering, emcompassing integrated loads analysis and foundation design for both fixed and floating offshore wind turbines. Our integrated service solution unlocks a turbine and foundation’s complex load interactions, driving greater design certainty in developing a WTG that meets your project specifications.
Fixed & Floating Foundation Engineering & Design

Fixed & Floating Foundation Engineering & Design

We provide structural analysis and design of bottom-fixed and floating wind turbine generator (WTG) foundations, substations, foundation load simulations, coupled load assessments, installation assessment, weather downtime analysis, and mooring and anchor analysis.  
Structural Engineering, Design & Analysis

Structural Engineering, Design & Analysis

In developing and validating a marine renewable energy design concept, an early understanding of an asset’s structural integrity and survivability is crucial to defining future CAPEX and OPEX costs and determining that asset’s feasibility.
Ocean Engineering

Ocean Engineering

Via OWC’s French specialist engineering and marine renewable energy branch, Innosea, OWC is able to provide a wide range of complex ocean engineering services to drive optimised results at any project stage for any time of marine environment.  
Offshore Interconnectors

Offshore Interconnectors

Offshore interconnectors are a vital infrastructure that enable the transmission of electricity between regions and countries, supporting energy security, decarbonisation, and market integration. OWC applies its profound offshore wind expertise to interconnector projects, offering tailored technical advisory and engineering services across the full lifecycle — from planning and early stage engineering to operations and maintenance. […]
Green Volt offshore windfarm awards cable engineering role to OWC

Green Volt offshore windfarm awards cable engineering role to OWC

Aug 26, 2025 4 min read
OWC supports the Green Volt Floating Windfarm Project with cable engineering support.
Innosea Rebrands as OWC

Innosea Rebrands as OWC

Jun 16, 2025 3 min read
Innosea – OWC’s French branch – is set to rebrand as OWC in July, strengthening the company’s global offering in renewable energy advisory.
OWC and Empire Engineering to support Ayre and Bowdun offshore wind farm

OWC and Empire Engineering to support Ayre and Bowdun offshore wind farm

Jun 5, 2025 5 min read
OWC and Empire Engineering have been selected to provide owner’s engineering services at the Ayre and Bowdun offshore wind farms, supporting Thistle Wind Partners (TWP), a consortium composed of DEME, Qair and Aspiravi, from concept selection through to further design phases […]
OWC secures Caribbean greenhouse gas monitoring engagement

OWC secures Caribbean greenhouse gas monitoring engagement

Jan 28, 2025 4 min read
Renewable energy consultancy OWC has been awarded a contract by Grand Cayman’s electric utility company, Caribbean Utilities Company, Ltd. (CUC), to provide a feasibility study to determine the requirements for a greenhouse gas emissions monitoring system […]
Hakim Mouslim to lead OWC’s European Operations  

Hakim Mouslim to lead OWC’s European Operations  

Jan 27, 2025 3 min read
Hakim Mouslim, co-founder of marine renewable energy consultancy Innosea, appointed Regional Director for OWC Europe.
Meet the Team: Laura Suarez

Meet the Team: Laura Suarez

Jun 21, 2024 3 min read
At Innosea and OWC, our teams are constantly expanding, into more locations, in expertise, and in sectors of influence, so that our people can truly drive safety and sustainability across our energy and oceans. Our people are at the heart of what we do and we invite you to get to know our team members […]