Triad dates for 2019/20 published

Triad dates for 201920 published

This week the National Grid ESO has published the Triad dates for 2019/20 and BiU are pleased once again to have had successfully identified all 3 periods published, with minimal alerts to clients.

The National Grid ESO Triad dates for 2019/20:

  • Monday 18 November, 17:00-17:30
  • Monday 2 December, 17:00-17:30
  • Tuesday 17 December, 16:30-17:00

What are Triads?

The Triad refers to the three half-hour settlement periods with highest system demand between November and February, separated by at least ten clear days. National Grid uses the Triad to determine TNUoS charges for customers with half-hour metering.

How do the Triads affect my bills?

The Triads only affect those customers who have meters that measure their demand on a half-hourly basis (typically large or medium industrial and commercial customers). If they do not consume electricity in the three “Triad” half-hours, they do not pay TNUoS charges for the entire financial year.

How can I reduce the impact of Triads on my bills?

Triads are difficult to accurately predict, and the dates are only published retrospectively. However, National Grid issues notice of insufficient system margin (NISM) when the system is likely to be under stress due to high demand and low generation. We provide a Triad forecasting service to notify when there is likely to be a Triad period, and for 2019/2020 we successfully identified and alerted our clients to the 3 triad periods above.

There are things that businesses can do to reduce the amount of energy they take from the grid during likely Triad periods, such as switching to onsite generation or reducing consumption during those times. This will greatly reduce TNUoS charges for the entire financial year.

The existing Triad system is being replaced with a fixed charge methodology from 2021.

For more information about the current triad service from BiU, or the fixed charge methodology for 2021, please get in touch with our team.