Chart of the week | Back in from the cold: the resurrection of STOR procurement

On 1 April National Grid ESO commenced procuring Short Term Operating Reserve (STOR) at the day-ahead stage, reviving the procurement of the STOR service since it was halted back in December 2019.

The freeze in the procurement of firm STOR contracts and the eventual move to day-ahead procurement was driven and shaped by the requirements of the EU’s Clean Energy Package (CEP). Specifically, Article 6(9), which placed an obligation on the ESO to procure the STOR product at the day-ahead stage from 1 January 2020.

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