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Generation availability map

Terms and conditions

The generation availability map provides an indication of the networks capability to connect large-scale developments to Major Substations. The main assumptions are:

  • The data is provided as an indication only
  • The existing generation and hence the constraints shown are based on existing generation commissioned on the network and do not include any outstanding and quoted generation.
  • Each substation has been given an overall classification based on the known constraints.
  • Connections to the substations with an overall RED classification are still possible, however there might be a requirement for significant network reinforcement to overcome the impact on the network constraints.
  • Connections to the substations with an overall GREEN classification may still not be possible, because of up-stream requirement for significant network reinforcement to overcome the impact on the network constraints.            

Legal disclaimer: We have developed the generation availability map to assist you with connections applications in constrained areas. They give a general illustration of generation availability constraints only and cannot be relied upon to assess the terms of connection for specific premises. Nothing in this disclaimer limits or excludes our liability for (a) death or personal injury caused by our negligence; (b) fraud or fraudulent misrepresentation; or (c) any other liability that cannot be limited or excluded by applicable law. Subject to the above, we shall not be liable to you in tort (including negligence) or otherwise, arising under or in connection with your use of the generation availability map for: (a) loss of profits; (b) loss of sales or business; (c) loss of agreements or contracts; (d) loss of anticipated savings; (e) loss of or damage to goodwill; or (f) any indirect or consequential loss.

We try to ensure that the content of this website is accurate, regularly updated and obtained from reliable sources, but there may be delays, omissions or inaccuracies in information contained in this site.  All information in this website is provided “as is”.   We give no guarantee of the completeness, accuracy, suitability or currentness of the information on this website and make no representation or warranty of any kind, express or implied, as to the accuracy of information hosted on this website or its fitness for a particular purpose. We do not accept responsibility for any errors or omissions in the information or for any results obtained, decisions made or actions taken following review of the information.  

Last Updated 22/10/2021 (52)
Terms And Conditions Accepted
  • Heat Map

    User Guide

    Step 1:

    Zoom in and out of the map and move between map and satellite view to locate the area where your project will be located.

    Step 2:

    Click on the substation to find out related information.

    Step 3:

    “Show Substations” illuminates all down-stream substations.

    Step 4:

    “Details” provides more information on the individual substation.

    All information is provided both as a map, list and is downloadable. Move between the four displays using the 'Map','Summary', 'Download' and 'Legend'tabs at the top of map.

  • Please note that distribution network constraints may be caused by a number of issues such as thermal, fault level, voltage constraints. Other constraints can be caused by physical space limitations within SSEN licence areas or limitations imposed by the Transmission System Operator.

    Please note that the Constrained term at distribution level in our Central Southern England Generation Availability Map is assessed based on the addition of at least 5MVA synchronous generator resulting in SSEN network constraints. If you intend to apply for generator capacities below 5MVA you may well consider the constrained areas as well as unconstrained areas. 

    Our Innovation Team are looking at different ways to overcome distribution network thermal constraints, please view our current projects by clicking here. For any other queries please send an e-mail at