The Triad Periods are the three half-hours in each winter season (November to February) that have the highest demand peaks on the electricity network. The three peaks have to be separated by ten days, so an extreme week-long cold snap can only dictate one of the three Triad Periods. The peaks tend to be in the half hour between 5 – 5.30pm.
The Transmission Network Use of System (TNUoS) charge is levied by National Grid in order to maintain and develop the national electricity system. The TNUoS charge is included within your supply contract and is payable based on your energy consumption during the Triad Periods each winter, therefore customers with pass-through TNUoS charges may be able to reduce consumption at these times, in order to achieve significant savings.
Our Triad Warning Service
Each day we can provide notification to customers stating whether we think a Triad Period may occur later that day or not. If the notification is positive, we will specify two or three half-hours, typically around 5:30pm, within which the Triad Period may fall. Notification can be sent via email or SMS and will usually arrive before 9:30am. We aim to send no more than 25 positive notifications in each winter season.
For further information regarding Triads please contact the Demand Forecast Team on 0113 306 2092.
The triad warning service (the “Service”) is a warning service provided by GDF SUEZ Marketing Limited (“We”) during the period November to February inclusive (the “Triad Season”) on working days. Pursuant to the Service, We will use reasonable endeavours to warn you by either email message or Short Messaging Service (SMS) message, at your election (the “Triad Warning”) of half hourly periods in the Triad Season which we believe have the highest demand peaks in the electricity delivery network (each period being a “Triad”). The Triad Warning will detail our estimated time window when the Triad may occur.
We are providing the Service to you on an estimation only basis and without any liability on our part to you or any third party.
Accordingly, We shall not bear any liability or responsibility for any costs claims, losses, liabilities, expenses claim or penalties incurred by you or any third party howsoever caused or arising, including without limitation; as a result of your reliance or failure to rely on a Triad Warning, your interpretation of a Triad Warning, us being delayed or failing to send a Triad Warning to you, or otherwise.