Generation Connections

We offer a range of quotation options based on the nature of your enquiry. 

Budget Estimates – Faster than a formal quote and provides a basic cost. It can’t be used to proceed with a connection, so you’ll need a formal quote to move forward. Budget estimates are great if you’re considering a connection but aren’t ready yet. They’re free and don’t include network studies. 

Feasibility Study - We can provide a detailed quote with accurate costs based on in-depth network studies. This option doesn’t have guaranteed performance timelines, so it’s best for customers planning to connect but with time to explore their options. This is generally more relevant for larger installations and comes with a cost to prepare.

Formal Offer - Our Formal Offer provides accurate costs based on detailed network studies, which can be accepted once prepared. These studies are more comprehensive than budget estimates and may take longer to complete. While there is no charge to prepare quotes for systems up to 50kW, connection costs may still apply. 

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You can complete the online application by providing all the information and attaching any relevant documents. Alternatively, select the article at the top of this page that matches to your generation requirements. These articles contain all the specific details you need to successfully submit your application. 

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• Appropriate ENA Forms (we can provide guidance on which forms are required depending on your request) 

• Plan to show the site boundary 

• Site layout plan with the point of supply marked 

• The type of generation you wish to connect 

• Letter of Authority - For all generation connection applications (excluding budget and feasibility study requests), where an applicant is not the landowner or occupier, we require a letter of authority to be submitted at the application stage.

Letter of Authority

While we own the network, you do not have to accept a quote from us. There are other companies that can perform various aspects of the work, and you’re free to seek alternative quotes from Independent Connections Providers (ICPs).

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Certain parts of our distribution network are constrained, which can mean that your connection may have an impact on the transmission network. Where this occurs, an application to the Transmission System Operator (TSO) is required to find out the impact your connection may have. 

More information can be found on National Grid's website. 

Read more about the processes for both of our distribution areas regarding generation connections impacting the transmission network. 
Your Connection Offer will confirm which process we will be required to use for your connection. 

Most parts of a generating unit, like a wind farm, hydro station, or solar site, have a life span of 20 to 40 years. After this, they may need to be refurbished or replaced, a process we refer to as Re-Powering.

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During your project, you may need to transfer the rights and obligations of your connection offer to a third party. This requires a legal document, called a Novation (SEPD - England & Wales) or Assignation (SHEPD - Scotland), signed by all parties. We’ve provided a guide and templates below. The documents are only complete once all three copies are agreed upon and signed. 

SEPD guide to Novation

SHEPD guide to Assignation