On this page you will find all of the Triad data documents as well as links to guidance materials.
What are Triads?
Triads are the three half-hour settlement periods with highest system demand. We use them to determine charges for demand customers with half-hour metering and payments to licence-exempt distributed generation.
Want to know more?
Take a look at our guidance on triads.
Note: Indicative Triads are based on data received to date can be found on Elexon's Electricity Data Summary.
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- relevant updates about our charging, forecasting and billing activities,
- invitations to attend our forums, webinars and workshops,
- links to our published guidance materials.
Triad data 2014-2023
Here is the Triad data for 2014-2023
|2022_23 Triad Data||3 Apr 2023|
|2021-22 Triad Data||29 Mar 2022|
|2020-21 Triad Data||26 Mar 2021|
|2019-20 Triad Data||26 Mar 2020|
|2018-19 Triad Data||26 Mar 2019|
|2017-18 Triad Data||22 Mar 2018|
|2016-17 Triad Data||27 Mar 2017|
|2014-15 Triad Data||27 Mar 2015|
|2015-16 Triad Data||24 Mar 2016|
|Triad Dates||19 Mar 2015|
Triad data pre-2014
Here is the Triads data pre-2014.
Transmission Network Use of System (TNUoS)
Transmission Network Use of System (TNUoS) charges recover the cost of installing and maintaining the transmission system in England, Wales, Scotland and Offshore.