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ESO
Electricity connection charges
Connection Charges recover the cost of installing and maintaining connection assets which connect individual users to the GB Transmission Network.
Who does this charge apply to?
✓ Generators
✕ Suppliers
✓ Directly connected transmission demand
✓ Distribution Network Operators
✓ Embedded Generators
✓ Interconnectors
The connection charge is calculated annually.
It consists of a capital component and a non-capital component.
Charges are published in January for each user and take effect from 1 April each year.
Understanding the electricity connection charges
Guide to connection charging (PDF)
Download our short guide to help you understand connection charging
Charge Modeller (XLS)
The charge modeller provides an indicative cost for the annual connection charge for new assets being installed, and allows you to create hypothetical scenarios on various factors
Application Fee Calculator (XLS)
The application fee calculator calculates the cost of an application fee based on the location of the connection, size of connection and offer type.
Connections information
If you want a new connection or already have a connection to the system that you would like to modify, please refer to our connections page.
Visit the Connections page
Additional help and support
Charging guidance
Access a range of guidance materials to help you understand how, when and what you’ll be charged.
Connection Charges enquiries
Contact us directly to raise a query relating to TNUoS and our publications, or to provide feedback. Please note or usual contact number is currently unmanned due to COVID-19 Homeworking.
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