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Leading service provider for Transmission System Operators (TSOs) in the European electricity market.

Through our single trading platform we auction cross-border transmission capacity rights. We also provide accounting (clearing and settlement), contracting, reporting, project support and IT services.

 

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Auctions

On behalf of TSOs, we organize long and short-term auctions of transmission capacity rights.

We offer the following products: yearly, seasonal, quarterly, monthly, weekly, daily and intraday.

Auction results Auction calendar
OPS
  • 500+
    Registered market participants
  • 26k+
    Auctions held annually
  • 100%
    Auction tool availability
  • 80+
    Employees
  • 50
    TSOs serviced

Latest market messages

Scheduled Maintenance – Publication Tool 1.3.0 Deployment

by JAO

Please be informed that we will deploy a new version 1.3.0. of our Publication Tool today at 5:00 PM.

During the deployment, you may experience a brief service interruption of up to 30 seconds.

Thank you for your understanding.

Jao operations.

SDAC_JAO_01: SDAC market coupling 30/06 - Session complete

by JAO

Please be informed that the day-ahead market coupling session is now completed.

[SDAC_ExC_02a]: Delay in Market Coupling Results Publication

by JAO

Dear Market Participants,

Please be aware that the publication of the preliminary SDAC Market Coupling Results is delayed until further notice.

The Market Coupling Results will be published as soon as they are available.

If needed, another delay message will be sent out.

Further information can be found in the Fallback Manual that is published on the websites of NEMO Committee and ENTSO-E.

Therefore, if relevant, we advise you to update your shadow bids at JAO eCAT platform before 14:10 CET/CEST.

Best regards,

Operations Team

Update: Credit limit check disabled for all auctions until further notice

by JAO

Please be informed that the previously reported issue has now been resolved. Credit limit checks have been fully reinstated for both Daily and Intraday Auctions.

We appreciate your understanding.

Update of ST auctions on Swiss borders in 15 min MTU and Block bids Go-live timeline

by JAO

Following the recent testing cycle and overall project progress, we would like to provide you with an update regarding the go‑live timeline for the 15‑minute MTU and Block Bids implementation.

Despite the significant efforts deployed by all involved parties, the project has experienced accumulated delays and remains strongly interdependent with the LTFBA project. The outcomes of the latest testing cycle indicate that several critical elements require further stabilisation and alignment before the solution can be considered ready for production.

We therefore inform you that the target go‑live is being revised to 2027. This additional timeframe will be used not only to ensure full stability of the solution, but also to further enhance the Block Bid design, taking into account feedback received from market participants and stakeholders.

At the same time, we would like to highlight that timelines remain tight, in particular regarding the collection and consolidation of requirements. A key milestone will be to reach sufficient alignment on potential design evolutions in August 2026, in order to preserve adequate time for implementation, testing, and validation ahead of go‑live.

We remain fully committed to maintaining close coordination with all stakeholders throughout this process. JAO will continue to provide regular updates and further communication to Market Participants as the project progresses, including an updated planning outlook in due course.

Should you have any questions, please do not hesitate to contact us.

Urgent Market Update: Cancellation of RS-MK-D-DAILYPRODU-260701-01 for Market Period 01/07/2026

by JAO

As per TSO request, the RS-MK Daily Auction for market period 01/07/2026 with the auction ID RS-MK-D-DAILYPRODU-260701-01 has been cancelled.

Capacity Curtailment on the ES-FR border for delivery period 01-07-2026

by JAO

1. TSO(s)*:

RTE, REE

2. Identification of affected Long Term Transmission Rights:

ES-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

4. Affected volume in MW / hour for each concerned period:

01-07-2026 11:00 - 12:00 1280 MW

01-07-2026 12:00 - 13:00 1280 MW

01-07-2026 13:00 - 14:00 1280 MW

01-07-2026 14:00 - 15:00 1280 MW

01-07-2026 15:00 - 16:00 1280 MW

01-07-2026 16:00 - 17:00 1280 MW

01-07-2026 17:00 - 18:00 1280 MW

01-07-2026 18:00 - 19:00 1280 MW

01-07-2026 19:00 - 20:00 1280 MW

01-07-2026 20:00 - 21:00 1280 MW

01-07-2026 21:00 - 22:00 1280 MW

01-07-2026 22:00 - 23:00 1280 MW

01-07-2026 23:00 - 24:00 1280 MW

5. Amount of LTTR remaining after curtailment:

01-07-2026 11:00 - 12:00 874 MW

01-07-2026 12:00 - 13:00 874 MW

01-07-2026 13:00 - 14:00 874 MW

01-07-2026 14:00 - 15:00 874 MW

01-07-2026 15:00 - 16:00 523 MW

01-07-2026 16:00 - 17:00 523 MW

01-07-2026 17:00 - 18:00 523 MW

01-07-2026 18:00 - 19:00 460 MW

01-07-2026 19:00 - 20:00 460 MW

01-07-2026 20:00 - 21:00 460 MW

01-07-2026 21:00 - 22:00 460 MW

01-07-2026 22:00 - 23:00 460 MW

01-07-2026 23:00 - 24:00 460 MW

6. Information on exact operational security limit(s) that are expected to be violated in the absence of curtailment*:

      11:00-12:00 Network Security

      12:00-13:00 Network Security

      13:00-14:00 Network Security

      14:00-15:00 Network Security

      15:00-16:00 Network Security

      16:00-17:00 Network Security

      17:00-18:00 Network Security

      18:00-19:00 Network Security

      19:00-20:00 Network Security

      20:00-21:00 Network Security

      21:00-22:00 Network Security

      22:00-23:00 Network Security

      23:00-24:00 Network Security

7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s)*?

The available remedial actions were assessed as insufficient or ineffective to avoid the violation of operational security limits

Our certifications

JAO has successfully implemented internationally recognized management systems and is now officially certified for ISO/IEC 27001:2022 – the global standard for Information Security Management Systems and for ISO 9001 – the international standard for Quality Management Systems. 

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IT

About us

We started as a shared auction platform for transmission capacity across Central Western Europe in 2008. Over time, we became the operator of the Single Allocation Platform and therefore the leading trading platform for European Transmission System Operators.

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Frequently asked questions

Check out the common questions and our answers on how to use the auction platform.

Do you need support?

If you can't find an answer to your question, our team is here to help!