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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.

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

Latest market messages

Delay in Allocation Results for HU<>RO-M-BASE-------251201-01

by JAO

Please note that the Allocation Results generation for auction ID:  HU<>RO-M-BASE-------251201-01 is delayed until further notice.

Thank you for understanding,

JAO Operations 

Capacity Curtailment on the DE-AT border for delivery period 22-11-2025

by JAO

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

DE-AT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

22-11-2025 00:00 - 01:00 4820 MW

22-11-2025 01:00 - 02:00 4820 MW

22-11-2025 02:00 - 03:00 4820 MW

22-11-2025 03:00 - 04:00 4820 MW

22-11-2025 04:00 - 05:00 4820 MW

22-11-2025 05:00 - 06:00 4820 MW

22-11-2025 06:00 - 07:00 4820 MW

22-11-2025 07:00 - 08:00 4820 MW

22-11-2025 08:00 - 09:00 4820 MW

22-11-2025 09:00 - 10:00 4820 MW

22-11-2025 10:00 - 11:00 4820 MW

22-11-2025 11:00 - 12:00 4820 MW

22-11-2025 12:00 - 13:00 4820 MW

22-11-2025 13:00 - 14:00 4820 MW

22-11-2025 14:00 - 15:00 4820 MW

22-11-2025 15:00 - 16:00 4820 MW

22-11-2025 16:00 - 17:00 4820 MW

22-11-2025 17:00 - 18:00 4820 MW

22-11-2025 18:00 - 19:00 4820 MW

22-11-2025 19:00 - 20:00 4820 MW

22-11-2025 20:00 - 21:00 4820 MW

22-11-2025 21:00 - 22:00 4820 MW

22-11-2025 22:00 - 23:00 4820 MW

22-11-2025 23:00 - 24:00 4820 MW

5. Amount of LTTR remaining after curtailment:

22-11-2025 00:00 - 01:00 3974 MW

22-11-2025 01:00 - 02:00 3974 MW

22-11-2025 02:00 - 03:00 3974 MW

22-11-2025 03:00 - 04:00 3974 MW

22-11-2025 04:00 - 05:00 3974 MW

22-11-2025 05:00 - 06:00 3974 MW

22-11-2025 06:00 - 07:00 3974 MW

22-11-2025 07:00 - 08:00 3974 MW

22-11-2025 08:00 - 09:00 3974 MW

22-11-2025 09:00 - 10:00 3974 MW

22-11-2025 10:00 - 11:00 3974 MW

22-11-2025 11:00 - 12:00 3974 MW

22-11-2025 12:00 - 13:00 3974 MW

22-11-2025 13:00 - 14:00 3974 MW

22-11-2025 14:00 - 15:00 3974 MW

22-11-2025 15:00 - 16:00 3974 MW

22-11-2025 16:00 - 17:00 3974 MW

22-11-2025 17:00 - 18:00 3974 MW

22-11-2025 18:00 - 19:00 3974 MW

22-11-2025 19:00 - 20:00 3974 MW

22-11-2025 20:00 - 21:00 3974 MW

22-11-2025 21:00 - 22:00 3974 MW

22-11-2025 22:00 - 23:00 3974 MW

22-11-2025 23:00 - 24:00 3974 MW

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

Expected violation of operational security limits of physical transmission assets.

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

During the CC process, all the remedial actions provided by the TSOs are already considered by the CCC in the calculation.

SDAC_JAO_01: SDAC market coupling 20/11 - Session complete

by JAO

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

SDAC_UMM_01a: Delay in final Market Coupling Results publication

by JAO

Dear Market Participants,

The SDAC Market Coupling process is delayed due to technical reasons or market issues.

Therefore, the publication of the final Market Coupling Results is delayed.

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

Best regards,

Operations Team

Capacity Curtailment on the IT-FR border for delivery period 21-11-2025

by JAO

1. TSO(s)*:

TERNA, RTE

2. Identification of affected Long Term Transmission Rights:

IT-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

21-11-2025 14:00 - 15:00 1494 MW

21-11-2025 15:00 - 16:00 1494 MW

21-11-2025 16:00 - 17:00 1494 MW

21-11-2025 17:00 - 18:00 1494 MW

21-11-2025 18:00 - 19:00 1494 MW

21-11-2025 19:00 - 20:00 1494 MW

21-11-2025 20:00 - 21:00 1494 MW

5. Amount of LTTR remaining after curtailment:

21-11-2025 14:00 - 15:00 924 MW

21-11-2025 15:00 - 16:00 191 MW

21-11-2025 16:00 - 17:00 191 MW

21-11-2025 17:00 - 18:00 191 MW

21-11-2025 18:00 - 19:00 191 MW

21-11-2025 19:00 - 20:00 818 MW

21-11-2025 20:00 - 21:00 1438 MW

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

Expected violation of operational security limits of physical transmission assets

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

During the CC process, all the remedial actions provided by the TSOs are already considered by the CCC

Capacity Curtailment on the IT-SI border for delivery period 21-11-2025

by JAO

1. TSO(s)*:

TERNA, ELES

2. Identification of affected Long Term Transmission Rights:

IT-SI

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

21-11-2025 13:00 - 14:00 334 MW

21-11-2025 14:00 - 15:00 334 MW

21-11-2025 15:00 - 16:00 334 MW

21-11-2025 16:00 - 17:00 334 MW

21-11-2025 17:00 - 18:00 334 MW

21-11-2025 18:00 - 19:00 334 MW

5. Amount of LTTR remaining after curtailment:

21-11-2025 13:00 - 14:00 267 MW

21-11-2025 14:00 - 15:00 143 MW

21-11-2025 15:00 - 16:00 60 MW

21-11-2025 16:00 - 17:00 60 MW

21-11-2025 17:00 - 18:00 60 MW

21-11-2025 18:00 - 19:00 60 MW

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

Expected violation of operational security limits of physical transmission assets

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

During the CC process, all the remedial actions provided by the TSOs are already considered by the CCC

Capacity Curtailment on the IT-AT border for delivery period 21-11-2025

by JAO

1. TSO(s)*:

TERNA, APG

2. Identification of affected Long Term Transmission Rights:

IT-AT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

21-11-2025 00:00 - 01:00 106 MW

21-11-2025 01:00 - 02:00 106 MW

21-11-2025 02:00 - 03:00 106 MW

21-11-2025 03:00 - 04:00 106 MW

21-11-2025 04:00 - 05:00 106 MW

21-11-2025 05:00 - 06:00 106 MW

21-11-2025 06:00 - 07:00 106 MW

21-11-2025 07:00 - 08:00 106 MW

21-11-2025 08:00 - 09:00 106 MW

21-11-2025 09:00 - 10:00 106 MW

21-11-2025 10:00 - 11:00 106 MW

21-11-2025 11:00 - 12:00 106 MW

21-11-2025 12:00 - 13:00 106 MW

21-11-2025 13:00 - 14:00 106 MW

21-11-2025 14:00 - 15:00 106 MW

21-11-2025 15:00 - 16:00 106 MW

21-11-2025 16:00 - 17:00 106 MW

21-11-2025 17:00 - 18:00 106 MW

21-11-2025 18:00 - 19:00 106 MW

21-11-2025 19:00 - 20:00 106 MW

5. Amount of LTTR remaining after curtailment:

21-11-2025 00:00 - 01:00 58 MW

21-11-2025 01:00 - 02:00 58 MW

21-11-2025 02:00 - 03:00 58 MW

21-11-2025 03:00 - 04:00 58 MW

21-11-2025 04:00 - 05:00 58 MW

21-11-2025 05:00 - 06:00 58 MW

21-11-2025 06:00 - 07:00 58 MW

21-11-2025 07:00 - 08:00 58 MW

21-11-2025 08:00 - 09:00 58 MW

21-11-2025 09:00 - 10:00 58 MW

21-11-2025 10:00 - 11:00 58 MW

21-11-2025 11:00 - 12:00 58 MW

21-11-2025 12:00 - 13:00 58 MW

21-11-2025 13:00 - 14:00 49 MW

21-11-2025 14:00 - 15:00 22 MW

21-11-2025 15:00 - 16:00 1 MW

21-11-2025 16:00 - 17:00 1 MW

21-11-2025 17:00 - 18:00 1 MW

21-11-2025 18:00 - 19:00 1 MW

21-11-2025 19:00 - 20:00 55 MW

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

Expected violation of operational security limits of physical transmission assets

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

During the CC process, all the remedial actions provided by the TSOs are already considered by the CCC

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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