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.

Fast reserve

Fast reserve provides rapid and reliable delivery of active power through increasing output from generation or reducing consumption from demand sources.

For active power delivery, providers must meet the following criteria:

  • active power delivery must start within two minutes of the dispatch instruction;
  • a delivery rate in excess of 25MW/minute;
  • the reserve energy should be sustainable for a minimum of 15 minutes; and
  • must be able to deliver minimum of 50MW.