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Applying to connect

To take the next step to connect, we ask you to complete the connections application form.

We appreciate that the application form is technical and complicated. This is because there are many stages to the connections process which require a lot of research and clarification.

To help you fill in the form, we’ve produced an application guide to help you understand the various requirements, plus the acronyms and terminology we use. This guide should also help you to decide which application is most suited to you.

Once you’ve completed your application form, you submit it to the ESO (National Grid Electricity System Operator), along with your application fee. Once the ESO receive your application they will work with us, the transmission owner to develop your connection offer.

Due to the COVID-19 pandemic you may have uncertainties about your connection application or are considering modifying your application. Please take a look at our Frequently Asked Questions to assist you with any concerns you may have.

Customer checklist

  • Have you provided all the required information in the application form, including technical data for the Data Registration Code?
  • Are you ready to pay the application fee?
  • Are you aware that you will be required to comply with the Grid Code and CUSC?
  • Do you understand your mandatory services requirements based on the size of your connection?

If you have answered no to any of these questions, please make an enquiry, we’re here to help.

Stage 3 of the connection process

Go to the next stage, designing your connection.

Watch our video that explains the process of applying to connect.

Supporting information


Have you got a question about this stage?

Go to FAQs

Connections application guide

If you’re applying to connect to the transmission system in England and Wales, then our handy guide will help you complete your National Grid ESO application form.

Download guide

Use our tools

Use our interactive network capacity map and our cost estimator to help you research your connection project.

Find out more

How much will it cost?

You can find out about all the costs involved in each of the application stages by visiting this page.

Find out more