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.

Utilisation Payment (£/MW/hr)

The service will be paid on utilisation of lower SEL capability (£/MW/hr) for the periods between Start Up Period and End Time.

We will make payments following the standard settlement for balancing services, which is paid monthly in arrears. A final statement, along with the self-bill invoices, is issued by the eighteenth business day of the following month that the service was provided.