- Back
- Who we are
- Electricity explained
- Future of energy
-
Industry information
- Back
- Home
- Industry information
- Connections
- Balancing Services
-
Charging
- Back
- Industry information
- Charging
- Balancing Services Use of System (BSUoS) charges
- Transmission Network Use of System (TNUoS) charges
- Assistance for Areas with High Electricity Distribution Costs (AAHEDC)
- Connection charges
- Charging guidance
- Charging policy developments
- Charging statements
- Submit a charging query
- Codes Homepage
- Balancing Data
- Keeping the lights on throughout coronavirus
- Our consultation responses
- Our strategy
- Research & publications
- Contact us
Our response to coronavirus
Find out how we're working to keep Great Britain’s lights on reliably throughout the outbreak
ESO
Triads Data
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.
Triad data 2014-2020
Here is the Triad data for 2014-2020.
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.