EU · eu-sdac-fallback-manual-v1-5-update

NEMO Committee releases full text of SDAC Fallback Manual v1.5, confirming 3 November 2026 applicability and detailing decoupling procedures

Implementation

ENERGY MARKETSDAY-AHEADmarket couplingfallback proceduresdecoupling mechanismscross-zonal capacity allocationshadow auctionsoperational governance

1Problem identified

2Consultation

3Proposal

4Regulatory review

5Decision

6Implementation

7Go-live

8Market impact

What changed

The primary source provides the complete content of SDAC Fallback Manual Version 1.5 (previously only an excerpt was available), confirming the same applicability date of 03/11/2026 and the same 'Highlighted changes versus previous version' label without itemizing the specific deltas versus v1.4. The new material adds extensive procedural detail already implicit in the prior record: full timelines for Partial Decoupling (CZC-related, during coupling, known in advance), Full Decoupling, associated market messages (SDAC_ExC series), interconnector-specific fallback allocation tables (Shadow Auctions via JAO, Intraday market, Nordic-Baltic regional coupling, back-to-owner), and regional annexes for Core, IBWT, Nordic-Baltic, Poland and BG-RO.

Why it matters

This fuller text operationalizes the governance update already flagged in the prior event: it specifies exact deadlines (11:30, 13:00, 14:20, 10:30 CET) and allocation mechanisms NEMOs, TSOs and JAO must follow for each SDAC interconnector during decoupling events, which is directly relevant to price formation continuity, cross-border capacity allocation and operational security ahead of the 3 November 2026 applicability date.

Design impact

Price formation○○○

Cross-border capacity●○○

Liquidity○○○

Operational security●●○

Market participants○○○

Affected markets

SDAC (Single Day-Ahead Coupling)Shadow Auctions (JAO)Intraday marketNordic-Baltic regional couplingCore region couplingIBWT region couplingPoland bidding zone auctionsBG-RO border coupling

Who is affected

NEMOsTSOsMarket ParticipantsJAONEMO Committee

MD analysis

The additional content confirms rather than alters the market-design significance already identified: this remains a procedural/operational codification of existing SDAC fallback concepts rather than a substantive reform. The detailed interconnector-by-interconnector fallback tables (Shadow Auctions, Intraday reallocation, Nordic-Baltic regional coupling, back-to-owner) and regional annex structures (Core, IBWT, Nordic-Baltic, Poland, RO-BG) suggest version 1.5 is largely a consolidation/clarification exercise, though without an explicit changelog against v1.4 it remains impossible to assess whether any deadline, allocation rule or regional annex was materially altered versus the prior version. Market participants should still seek the dedicated change-log to confirm whether any of the timelines or fallback allocation assignments shown here differ from v1.4.

Rule / framework

CACM Regulation (Capacity Allocation and Congestion Management)

Next milestone

SDAC Fallback Manual Version 1.5 becomes applicable · 3 Nov 2026

Primary sources

NEMO Committee · MARKET_OPERATOR · 2026-10-26

SDAC Fallback Manual - updated version

Open primary source ↗

nemo-sdac-fallback-manual-updated-version