As used for electricity, the name formerly given to the avoidance of transmission network use of system charges (TNUoS charges) by an electricity supplier where an embedded generator generated during a triad period. The benefit was usually shared between the embedded generator and the electricity supplier. Large industrial customers that were directly connected to the electricity transmission system could also obtain a triad benefit from the avoidance of TNUoS charges. The energy market regulator, Ofgem, launched a review of these benefits in March 2017, resulting in the benefits being phased out.

For more information, see Practice note, Electricity network charges: charging reviews and embedded benefits.