Onshore Proposals

On land the project will include:

1. Landfall substation

  • The substation will be close to the point where electrical cables are brought to shore near South Stack.
  • The substation will have a footprint of around 50m x 70m within a fenced or walled enclosure.


2. Cables and cable routes

  • There will be up to 9 export cable coming from groups of tidal devices at sea to the land.
  • Horizontal directional drilling (HDD) is the preferred method for bringing the cables ashore – this would drill under the coast from near the landfall substation.
  • From the substation a cable will then be buried in the roads along a route to a grid connection point at Holyhead.


3. Grid substation

  • A grid substation will be built to house equipment for Morlais to connect to the National Grid
  • Morlais will connect to the National Grid at Holyhead
  • The grid substation will have a footprint of around 100 x 100m with a fenced enclosure



Offshore Proposals

The Morlais project has secured consent to put infrastructure in place offshore to allow developers of tidal energy technology to deploy their devices within the designated zone.

The developers will become tenants of Morlais, and pay for the right to use the site and infrastructure.

Several technology developers from around the world have already agreed to work with Morlais and deploy their technology at the site.


The offshore equipment owned and managed by Morlais will include:

  • Up to 9 cables taking electricity from groups or arrays of tidal devices to the landfall substation


The developer/ tenant infrastructure will include:

  • Tidal devices grouped together into a series of arrays
  • Foundations and moorings or anchors on the seabed holding the devices in place
  • Hubs or connection boxes allowing several devices to be connected together into groups
  • Seabed cables between the devices connecting them together