JAO Updates Go-Live Timeline for 15-Minute MTU and Simplified Block Bids on Swiss Border Auctions

JAO issued an updated timeline for implementing a 15-minute Market Time Unit (MTU) capacity allocation process on Swiss border auctions, now targeted for late Q1 2027, alongside a significantly simplified block bid solution that will be delivered via the new Orion auction platform, now expected no earlier than September 2027. JAO also launched a short follow-up survey to Swiss border TSOs/market participants on their preferred implementation approach, with responses due by 20 October 2026.

The move to 15-minute MTU aligns Swiss cross-border short-term capacity allocation with the finer granularity used elsewhere in the EU internal electricity market, improving temporal precision for cross-border trading. The simplification of block bids reflects a material design compromise reached after stakeholder consultation, balancing market needs against implementation complexity. The dependency on the Orion platform ties the block bid feature's availability to a separate, larger platform deployment, creating a critical-path risk for the overall go-live schedule, which has already slipped from a June 2026 communication.

This event is a design-and-implementation update rather than a wholly new policy, but it crystallizes several concrete decisions: a redesigned (simplified) block bid product, a confirmed-but-still-conditional go-live window for 15-min MTU, and an explicit platform dependency (Orion) that pushes block bid availability out to at least September 2027. From a market design perspective, the key points are (1) temporal granularity convergence for Swiss border short-term auctions with broader European MTU standards, (2) a stakeholder-driven simplification of block bid mechanics — a common trade-off between product sophistication and delivery risk/operational complexity, and (3) sequencing risk, since the block bid feature is now contingent on the broader Orion platform rollout rather than being deliverable independently. The active survey (deadline 20 October 2026) indicates the implementation approach is not yet finalized and remains subject to further TSO/NRA/market participant input, meaning further design iterations are plausible before the Q1 2027 target.

Not explicitly specified in source; relates to JAO-administered capacity allocation rules governing Swiss border short-term auctions

Deadline for market participant survey responses on preferred implementation approach · 20 Oct 2026

Primary sources