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New connections

Here you will find more details about connections to the National Electricity Transmission System (NETS), how they differ across parts of Great Britain, and more about transmission owners (TOs).

England and Wales 


  • National Grid Electricity Transmission (ET) owns the transmission system in England and Wales;

  • Customer assets will be physically connected to National Grid ET's owned assets in England and Wales;

  • Connections to the NETS in England and Wales tend to be larger; generators are usually required to be at least 50MW to be connected to the transmission system.

  • The ownership of the transmission system in Scotland is shared between two TOs: Scottish & Southern Electricity Networks and SP Energy Networks

  • Customer assets will be connected to the transmission assets owned by either of the Scottish TO companies depending on where they are;

  • Connections to the NETS in Scotland tend to be smaller.


For embedded generators, when you embark on a new connection project, one of the first things you need to be aware of is the current availability of capacity on the distribution network operator's (DNO) network. You can find out who your local DNO is by entering your postcode on the Energy Networks Association website.


Transmission map

This map shows the locations of the three British TOs. You can use it to go to the website of each TO.  

  1. Scottish & Southern Electricity Networks
  2. SP Energy Networks
  3. National Grid