Triad Management Services


Electricity suppliers pay National Grid for installing, maintaining and operating the transmission system, calculated from their demand in each UK region at the time of highest national electrical demand. These peak demand times are known as Triads.

Triads are the three half-hour periods during Winter (1st November to 28th February) with the highest national demand for electricity, separated by ten clear days. This is when industrial demand coincides with the domestic consumption at its peak; typically between 4 and 7 pm.

Triad Charge (TNUoS) reflects the costs incurred by National Grid and is divided into a 27:73 ratio between generators that export on to the system and suppliers that import from it.

Transmission customers pay a charge based on which geographical zone they are in, whether they are generation or supply and the size of that generation or supply. Triad charges are passed on to you by your electricity supplier, based on your electricity demand at the time of the Triads and are typically responsible for around 12% of your total electricity bill.

However, with prior warning, you can reduce this charge – which often runs to tens or hundreds of thousands of pounds – by reducing consumption when you know a Triad is going to occur. You can therefore reduce your bills by reducing your electricity use during the Triads.

If you have a pass-through charge or an inclusive contract with your electricity supplier, then the Triad element is priced within the unit rates. Pearlstone Energy has the ability to develop a tailored Triad Management Strategy for your facilities, identifying when Triads are likely to occur & employing our ADR solution to limit your consumption for up to two hours when a Triad might take place.