In phase one, two offshore substations will be installed to collect power from groups of wind turbines before feeding it to shore via the main export cables. The voltage will also be stepped up to increase the efficiency of power transmission in the export cables.

Each offshore substation will typically comprise the following key components:
• Transformers
• Electrical switchgear
• Back-up electrical generator and batteries

In phase two, additional offshore substations and export cables will be required to connect to the onshore electricity network.