In January 2025, the National Energy System Operator introduced a temporary pause in connection applications. This pause aims to deliver a stable foundation for implementing its new connections process , subject to Ofgem approval. It will allow customers time to have a signed offer in place when the implementation stage of the process begins. Consequently, new connection applications are not being accepted at present. Visit NESO’s Transition to Connections Reform for further information, and learn more about the pause in applications in NESO’s FAQ document.
With such a huge level of interest and activity in renewable connections, it’s important that your connection application is prepared correctly. We’re here to help.
1. Arrange to talk to us
At SSEN Transmission, we will work with you to review your plans, discuss potential options and guide you through the application process. We’ll put you
in touch with the right people, both here and at National Grid Electricity System Operator (NGESO), ensuring you have all the guidance you need on initial feasibility, application and data requirements. We’ll also provide details on fees and charges, plus any other support you may need to get your application off the ground.
2. Provide background information
Before you come and speak to us, it’s important that you have the following information to hand as it will help to inform our discussion:
• Capacity of your development in Megawatts (MW).
• Planned location of your substation in the form of a six digit grid reference.
• Ideal date for you to be connected to the network.
3. Complete the appropriate documents
And finally, once you are ready to make you application, there are specific documents you must complete and submit to National Grid. You’ll find details at Connections Offer Process | National Grid ESO
Paying for your application, connection and infrastructure
There are three distinct areas that you’ll need to budget for – your application fee first, followed by construction costs and ongoing charges.
The application fee you need to pay to NGESO is dictated by a number of factors, including your network area and the capacity of your development in Megawatts.
Infrastructure works are paid for via Transmission Network Use of System (TNUoS Charges) – you pay all charges levied to NGESO and we, in turn, are paid by them under established regulatory mechanisms.
Ongoing connection charges can either be paid in advance of your network access or over the lifetime of the development (typically 25 years).
Further details are available from the National Grid website at Connections Offer Process | National Grid ESO