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  • Generation connections

    Are you thinking about installing a new generator at your property? 

    Once you have chosen your preferred type of generator it will need to be connected to our network either through your existing supply or through a new electricity connection.

    Guides are provided below to help you apply for your generator connection.
    Solar panel on a house
  • Understanding Generation

  • Scottish and Southern Electricity Networks is committed to protecting the environment and makes more energy from wind and water than anyone else in the UK.  We are continually seeking to improve on our service for Connection customers and the current improvements we are working on can be found on the following page, our plans and commitments.

    If your proposed generator is smaller than or equal to 50kW, in most areas there is no need to worry about wider network capacity constraint issues or network reinforcement costs. However, due to the constrained capacity available in some areas, you may have to wait for the reinforcement to connect even where your proposed aggregate generation capacity is 50kW or less. For more information please contact our Commercial Contract Management Team.

    If your overall proposed generation is greater than or equal to 50kW it would be worth checking our thermal network capacity map to understand if there are any constraints in your area as this means that reinforcement is likely to be required for your connection. There are limits to the amount of generation a transformer can handle and this constraint affects not only small local transformers but can also affect larger transformers in substations. Any further generation connection to an area that is significantly constrained would trigger reinforcement costs of new equipment which can be very high.

    Please view our Generation Availability map which provides an indication of the networks capability to connect a large-scale development.

    The Electrical Networks Association (ENA) provides helpful guides published on their website

    We have also created the Step by Step guide for you to download that you can find on the right hand side of this page.  Once you are aware of the scale of your generation connection you can find the application forms above.

    Choice in connection provider
    When you receive a quotation for the connection it will be split into contestable and non-contestable elements.  This is done to be as clear as possible to what element a third party Independent Connection Provider (ICP) can offer.  For further information of what an ICP can offer, follow the link below.


    Witness testing

    When works on site have been completed to connect a generator, there can be a requirement for Scottish and Southern Electricity Networks staff to witness your commissioning engineer while they test the protection systems associated with the generator.  This is to ensure it operates correctly. We have produced a guide to inform customers of what to expect when witnessing different types of connection , see below:

    • Community Connections Guide

    • Statement of works

    • Electricity distribution networks have traditionally been predominantly passive in nature, with generation moving from central locations across the transmission system to customers connected to the lower voltage networks.  However, with the growth of embedded generation at all voltage levels, our networks are heavily constrained in certain areas to the extent that your connection may have an impact on the transmission system.  In these circumstances we may require you to apply for a Statement of Works (SoW) from National Grid

      Scottish and Southern Electricity Networks (SHEPD area - Northern Scotland) – Large areas of Scotland are heavily constrained for new generation due to the significant volume of generators seeking to connect and the lack of electrical demand.  Therefore for any proposed new generator between 1MW and 10MW in size, Scottish and Southern Electricity Networks will need to apply for a SoW from National Grid (who operates the transmission network) on your behalf.  National Grid will then assess and plan for the impact of your generation on the overall network.  Below you will find a flow chart of National Grid’s SoW process in the Scottish and Southern Electricity Networks SHEPD area.

      Scottish and Southern Electricity Networks SHEPD Statement of Works Process

      Any proposed new generator looking to generate 10MW or more requires you to apply to National Grid directly for a BELLA (Bilateral Embedded Licence Exemptible Large Power Station Agreement) or a BEGA (Bilateral Embedded Generation Agreement). Below you will find a large Distributed Generation Process Guide to help you with this process in the Scottish and Southern Electricity Networks SHEPD area. 

      Scottish and Southern Electricity Networks SHEPD 10MW or above process guide

      Scottish and Southern Electricity Networks (SEPD area - Central southern England) – Parts of our network in Southern England are also heavily constrained for new generation due to the significant volume of generators seeking to connect and the lack of electrical demand.  Therefore for any proposed new generator greater than 1MW in size, Scottish and Southern Electricity Networks may need to apply for a SoW from National Grid (who operates the transmission network) on your behalf.  This will be confirmed either way in your initial grid connection offer from Scottish and Southern Electricity Networks. National Grid will then assess and plan for the impact of your generation on the overall network.  Below you will find a flow chart of National Grid’s SoW process in the Scottish and Southern Electricity Networks SEPD area.

      Scottish and Southern Electricity Networks SEPD Statement of Works Process

        For the most up-to-date picture and a full background on Transmission Network plans you can also look at the National Grid website and in particular their Transmission 10 year statement.

        For an overview of our Distribution Network plans you can also look at our long term development statements - where you will be able to find a summarised version and also details of how to obtain a full copy.

        Another useful page is our capacity statement section. As well as our recent capacity statement, this provides information on work with Active Network Management solutions and the Low Carbon Network Fund. You can find out more here or speak to one of our Active Solutions Team members.

      • Commercial Contract Management Team

      • Our Commercial Contract Managers team are the first port of call for customers looking to connect Distributed Generation (DG) on to our Distribution network. Our team includes geographic Contract Managers, whose main duty is to assist our customers through the process of securing a connection for generation. We are available to meet with prospective customers before an application has been made, discuss a quote prior to issuing it and will then be available to assist and guide the customer right through to energisation of the project.
      • Novation / Assignation

        Throughout the development and build of your project, you may require the rights and obligations of your connection offer to be transferred to a third party. In order to achieve this, a legal document is required to capture the details and permissions of all parties involved. This document is known as a Novation (SEPD - England & Wales) or Assignation (SHEPD - Scotland) and must be completed by all parties. We have created a guide and template documents to Novation’s & Assignations that can be found below. Please note the documents are not complete until we agree and sign each of the three copies.
      • Should you require any further help or advice on this process you can contact your relevant Commercial Contract Manager, as shown in the above links.
      • If the generation is provided for standby or back up use only and will have no operation in parallel with our network, then it will need an automatic changeover scheme or a manual changeover which must prevent parallel operation with our network.
        If automatic, it must be fail-safe against parallel operation with our network. We will require a schematic and description of the proposed operation of your system, for approval prior to installation. In addition, you must inform your nominated supply company.

        These will need to be emailed to mcc@sse.com