Market Participants Consultation – Preparation of SDAC Fallback Concept
OKTE, a.s., as a Nominated Electricity Market Operator (NEMO) and a member of the NEMO Committee, is participating in a joint initiative of European NEMOs and Transmission System Operators (TSOs) aimed at analysing an alternative fallback mechanism for the Single Day-Ahead Coupling (SDAC).
We would like to invite you to provide your feedback on the proposed concept by 17 April, 2026 via this link.
The proposed concept considers the use of Single Intraday Coupling Continuous Trading (SIDC CT – XBID) as:
- a replacement for capacity allocation (instead of Shadow Auctions)
- a method for determining the SDAC reference price in case of full or partial decoupling (i.e. when the SDAC price cannot be calculated).
Further details were presented at the latest MCCG meeting and are available on the NEMO Committee websites in this link.
Important notice
The proposed fallback mechanism is currently under discussion only.
The geographical scope, implementation timeline, and detailed process steps have not yet been agreed among TSOs and NEMOs.
Objective of the consultation
The purpose of this consultation is to:
- gather feedback from market participants,
- identify key drivers and potential limitations,
- support the final design of the fallback mechanism.
Particular attention is given to the impact on scheduling processes, as TSOs rely on submitted schedules for system operation planning.
The reliability of schedules is therefore a key assessment criterion.
Key facts
- Since the launch of SDAC, no full decoupling has occurred.
- No decoupling has taken place in a bidding zone with multiple NEMOs.
- All exceptional situations are clearly defined in operational procedures.