Our charging documentation page is where you can now find all of our charging statements and policy developments along with all the guidance documents and webinars you need if you're new to charging.
In this section you will find guidance materials to help you understand how, when and what you'll be charged.
The methodology we use to set tariffs and calculate charges is in the Connection and Use of System Code (CUSC), Section 14.
TNUoS guidance
Name Sort ascending | Published |
---|---|
What are Triads? | 7 Nov 2018 |
What are Transmission Losses? | 15 Jan 2024 |
TNUoS tariffs for suppliers (includes link to recorded webinar) | 12 Jul 2019 |
TNUoS in 10 minutes | 8 Feb 2024 |
TNUoS for offshore generators and the OFTO regime | 20 Dec 2018 |
TNUoS for new suppliers | 13 Dec 2018 |
TNUoS DCLF ICRP (TnT) Model Training - Presentation | 12 Oct 2020 |
TNUoS charging and billing timeline | 7 Nov 2018 |
TNUoS charges for generators | 4 Apr 2019 |
T and T Model Training Videos | 31 Jan 2023 |
BSUoS guidance
Name Sort ascending | Published |
---|---|
BSUoS data sources | 27 Mar 2024 |
Connection charging guidance
Name Sort ascending | Published |
---|---|
Guide to Termination Amounts | 10 Jan 2024 |
Customer Charge Modeller 2023-24 | 5 Oct 2023 |
Application Fee Calculator (2024/25) | 28 Mar 2024 |
Ad-hoc Charges Guide | 31 Mar 2023 |
A Guide to Connection Charges | 31 Mar 2023 |
AAHEDC guidance
Name Sort ascending | Published |
---|---|
A guide to AAHEDC charges | 11 Dec 2018 |
General charging guidance
STAR Billing System Guidance
Archive forum materials
Archive documents
Archive forum materials
Archive forum materials
Archive forum materials
The charging statements describe our charges and the methodologies behind them.
Further information on the methodologies that underpin the charging statements can be found in two statements:
- the Use of System Charging Methodology Statement and the Connection Charging Methodology Statement.
- These statements are both included within Section 14 of the Connection and Use of System Code (CUSC).
Current Charging Statements
Archive
Name Sort ascending | Published |
---|---|
TNUoS Generation Zones Map - Geographical | 23 Sep 2013 |
TNUoS Demand Zones Map - Geographical | 23 Sep 2013 |
Ofgem letter of approving the form of the Statement of Use of System Charges | 23 Sep 2013 |
National Grids request to amend the form of the Statement of Use of System Charges | 23 Sep 2013 |
Issue 9 Revision 1-9 August 2013 Updated from 1 April | 23 Sep 2013 |
Issue 9 Revision 0 - 2nd May 2013 | 23 Sep 2013 |
Issue 8 Revision 0 - 1 April 2012 | 23 Sep 2013 |
Issue 7 Revision 0 | 23 Sep 2013 |
Issue 6 Revision 1 | 23 Sep 2013 |
Issue 6 Revision 0 | 23 Sep 2013 |
In this section you will find consultation documents and policy developments and decisions.
The methodology we use to set tariffs and calculate charges is in the Connection and Use of System Code (CUSC), Section 14.
Charging methodology policy decisions
These are policy decisions documents relating to TNUoS charging methodology that are not codified within the CUSC.
Name Sort ascending | Published |
---|---|
TNUoS Onshore Locational Security Factor Consultation - Decision | 4 Jan 2021 |
Open letter responses | 23 Oct 2017 |
Investment Ahead of TEC Guidance Document | 24 Jun 2015 |
Inv Ahead of TEC Guidance Document V2_0 | 23 Oct 2017 |
Inv Ahead of TEC Guidance Document V2.0 draft | 7 Aug 2017 |
Inv Ahead of TEC Guidance Document V1_0-V2_0 track changes | 23 Oct 2017 |
Delay Charge Open Letter | 24 Jun 2015 |
Open letters, consultations and notices
These documents are open letters and informal consultations relating to TNUoS charges.
Tertiary Open Letter
More from charging
One place for electricity network users to learn, contribute and shape the reform of GB's electricity network access and charging arrangements.
Submit a query through our webform, get involved through forums and steering groups, or reach out to the relevant charging team.
Join our mailing list to receive publication updates, invitations to our forums, webinars and workshops, and links to our latest guidance materials.