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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

SDAC_JAO_01: SDAC market coupling 30/12 - 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.

We advise you to update your shadow bids at JAO eCAT platform before 14:10 CET/CEST.

Best regards,
Operations Team

[SDAC_ExC_02]: Delay in Market Coupling Results Publication

by JAO

Dear Market Participants,

Please be aware that the publication of the 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.

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 CH-IT border for delivery period 31-12-2025

by JAO

1. TSO(s)*:

SWISSGRID

2. Identification of affected Long Term Transmission Rights:

CH-IT

3. Triggering event:

Curtailment due to Curtailment to ensure operation remains within Operational Security Limits

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

31-12-2025 00:00 - 01:00 1583 MW

31-12-2025 10:00 - 11:00 1583 MW

31-12-2025 11:00 - 12:00 1583 MW

31-12-2025 12:00 - 13:00 1583 MW

31-12-2025 13:00 - 14:00 1583 MW

31-12-2025 14:00 - 15:00 1583 MW

31-12-2025 16:00 - 17:00 1583 MW

31-12-2025 17:00 - 18:00 1583 MW

31-12-2025 18:00 - 19:00 1583 MW

31-12-2025 19:00 - 20:00 1583 MW

31-12-2025 20:00 - 21:00 1583 MW

31-12-2025 21:00 - 22:00 1583 MW

31-12-2025 22:00 - 23:00 1583 MW

31-12-2025 23:00 - 24:00 1583 MW

5. Amount of LTTR remaining after curtailment:

31-12-2025 00:00 - 01:00 1484 MW

31-12-2025 10:00 - 11:00 1356 MW

31-12-2025 11:00 - 12:00 634 MW

31-12-2025 12:00 - 13:00 332 MW

31-12-2025 13:00 - 14:00 634 MW

31-12-2025 14:00 - 15:00 1356 MW

31-12-2025 16:00 - 17:00 1536 MW

31-12-2025 17:00 - 18:00 1536 MW

31-12-2025 18:00 - 19:00 1536 MW

31-12-2025 19:00 - 20:00 1536 MW

31-12-2025 20:00 - 21:00 1536 MW

31-12-2025 21:00 - 22:00 1536 MW

31-12-2025 22:00 - 23:00 1536 MW

31-12-2025 23:00 - 24:00 1484 MW

Capacity Curtailment on the FR-IT border for delivery period 31-12-2025

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

FR-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

31-12-2025 11:00 - 12:00 1282 MW

31-12-2025 12:00 - 13:00 1282 MW

31-12-2025 13:00 - 14:00 1282 MW

5. Amount of LTTR remaining after curtailment:

31-12-2025 11:00 - 12:00 690 MW

31-12-2025 12:00 - 13:00 422 MW

31-12-2025 13:00 - 14:00 690 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

Capacity Curtailment on the SI-IT border for delivery period 31-12-2025

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

SI-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

31-12-2025 00:00 - 01:00 271 MW

31-12-2025 01:00 - 02:00 271 MW

31-12-2025 02:00 - 03:00 271 MW

31-12-2025 03:00 - 04:00 271 MW

31-12-2025 04:00 - 05:00 271 MW

31-12-2025 05:00 - 06:00 271 MW

31-12-2025 06:00 - 07:00 271 MW

31-12-2025 07:00 - 08:00 271 MW

31-12-2025 08:00 - 09:00 271 MW

31-12-2025 09:00 - 10:00 271 MW

31-12-2025 10:00 - 11:00 271 MW

31-12-2025 11:00 - 12:00 271 MW

31-12-2025 12:00 - 13:00 271 MW

31-12-2025 13:00 - 14:00 271 MW

31-12-2025 14:00 - 15:00 271 MW

31-12-2025 15:00 - 16:00 271 MW

31-12-2025 16:00 - 17:00 271 MW

31-12-2025 17:00 - 18:00 271 MW

31-12-2025 18:00 - 19:00 271 MW

31-12-2025 19:00 - 20:00 271 MW

31-12-2025 20:00 - 21:00 271 MW

31-12-2025 21:00 - 22:00 271 MW

31-12-2025 22:00 - 23:00 271 MW

31-12-2025 23:00 - 24:00 271 MW

5. Amount of LTTR remaining after curtailment:

31-12-2025 00:00 - 01:00 102 MW

31-12-2025 01:00 - 02:00 107 MW

31-12-2025 02:00 - 03:00 109 MW

31-12-2025 03:00 - 04:00 128 MW

31-12-2025 04:00 - 05:00 115 MW

31-12-2025 05:00 - 06:00 114 MW

31-12-2025 06:00 - 07:00 114 MW

31-12-2025 07:00 - 08:00 129 MW

31-12-2025 08:00 - 09:00 129 MW

31-12-2025 09:00 - 10:00 114 MW

31-12-2025 10:00 - 11:00 87 MW

31-12-2025 11:00 - 12:00 50 MW

31-12-2025 12:00 - 13:00 26 MW

31-12-2025 13:00 - 14:00 51 MW

31-12-2025 14:00 - 15:00 106 MW

31-12-2025 15:00 - 16:00 116 MW

31-12-2025 16:00 - 17:00 115 MW

31-12-2025 17:00 - 18:00 115 MW

31-12-2025 18:00 - 19:00 108 MW

31-12-2025 19:00 - 20:00 108 MW

31-12-2025 20:00 - 21:00 108 MW

31-12-2025 21:00 - 22:00 108 MW

31-12-2025 22:00 - 23:00 108 MW

31-12-2025 23:00 - 24:00 102 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
 

Capacity Curtailment on the AT-IT border for delivery period 31-12-2025

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

AT-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

31-12-2025 00:00 - 01:00 204 MW

31-12-2025 01:00 - 02:00 204 MW

31-12-2025 02:00 - 03:00 204 MW

31-12-2025 03:00 - 04:00 204 MW

31-12-2025 04:00 - 05:00 204 MW

31-12-2025 05:00 - 06:00 204 MW

31-12-2025 06:00 - 07:00 204 MW

31-12-2025 07:00 - 08:00 204 MW

31-12-2025 08:00 - 09:00 204 MW

31-12-2025 09:00 - 10:00 204 MW

31-12-2025 10:00 - 11:00 204 MW

31-12-2025 11:00 - 12:00 204 MW

31-12-2025 12:00 - 13:00 204 MW

31-12-2025 13:00 - 14:00 204 MW

31-12-2025 14:00 - 15:00 204 MW

31-12-2025 15:00 - 16:00 204 MW

31-12-2025 16:00 - 17:00 204 MW

31-12-2025 17:00 - 18:00 204 MW

31-12-2025 18:00 - 19:00 204 MW

31-12-2025 19:00 - 20:00 204 MW

31-12-2025 20:00 - 21:00 204 MW

31-12-2025 21:00 - 22:00 204 MW

31-12-2025 22:00 - 23:00 204 MW

31-12-2025 23:00 - 24:00 204 MW

5. Amount of LTTR remaining after curtailment:

31-12-2025 00:00 - 01:00 76 MW

31-12-2025 01:00 - 02:00 78 MW

31-12-2025 02:00 - 03:00 81 MW

31-12-2025 03:00 - 04:00 64 MW

31-12-2025 04:00 - 05:00 64 MW

31-12-2025 05:00 - 06:00 64 MW

31-12-2025 06:00 - 07:00 64 MW

31-12-2025 07:00 - 08:00 76 MW

31-12-2025 08:00 - 09:00 76 MW

31-12-2025 09:00 - 10:00 76 MW

31-12-2025 10:00 - 11:00 76 MW

31-12-2025 11:00 - 12:00 76 MW

31-12-2025 12:00 - 13:00 76 MW

31-12-2025 13:00 - 14:00 76 MW

31-12-2025 14:00 - 15:00 76 MW

31-12-2025 15:00 - 16:00 76 MW

31-12-2025 16:00 - 17:00 76 MW

31-12-2025 17:00 - 18:00 76 MW

31-12-2025 18:00 - 19:00 76 MW

31-12-2025 19:00 - 20:00 76 MW

31-12-2025 20:00 - 21:00 76 MW

31-12-2025 21:00 - 22:00 76 MW

31-12-2025 22:00 - 23:00 76 MW

31-12-2025 23:00 - 24:00 64 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
 

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. 

ISO
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.

Get to know us
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JAO workers

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!