We are becoming a separate company

In April 2019, the Electricity System Operator is becoming a separate company within the National Grid Group. Find out more about what this change will mean.

Super SEL

Super SEL is utilised to directly decrease the sum of the minimum MW level or Stable Export Limit (SEL) of generators synchronized to the system by lowering the minimum generating level at a generator synchronised.

Providing the service

The service is open to Balancing Mechanism participants who can meet the minimum technical requirement. Super SEL service does not require a change in energy output of the generation, it is to give access to a reduced minimum active power level. Super SEL contract enactment will be a through a trading instruction. Dispatch will be via the Balancing Mechanism to reduce output to the new lower SEL if required.