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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.

 

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

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Capacity Curtailment on the IF1-GB-FR border for delivery period 26-05-2026

by JAO

1. TSO(s)*:

RNP

2. Identification of affected Long Term Transmission Rights:

IF1-GB-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

26-05-2026 00:00 - 01:00 1889 MW

26-05-2026 01:00 - 02:00 1889 MW

26-05-2026 02:00 - 03:00 1889 MW

26-05-2026 03:00 - 04:00 1889 MW

26-05-2026 04:00 - 05:00 1889 MW

26-05-2026 05:00 - 06:00 1889 MW

26-05-2026 06:00 - 07:00 1889 MW

26-05-2026 07:00 - 08:00 1889 MW

26-05-2026 08:00 - 09:00 1889 MW

26-05-2026 09:00 - 10:00 1889 MW

26-05-2026 10:00 - 11:00 1889 MW

26-05-2026 11:00 - 12:00 1889 MW

26-05-2026 12:00 - 13:00 1889 MW

26-05-2026 13:00 - 14:00 1889 MW

26-05-2026 14:00 - 15:00 1889 MW

26-05-2026 15:00 - 16:00 1889 MW

26-05-2026 16:00 - 17:00 1889 MW

26-05-2026 17:00 - 18:00 1889 MW

26-05-2026 18:00 - 19:00 1889 MW

26-05-2026 19:00 - 20:00 1889 MW

26-05-2026 20:00 - 21:00 1889 MW

26-05-2026 21:00 - 22:00 1889 MW

26-05-2026 22:00 - 23:00 1889 MW

26-05-2026 23:00 - 24:00 1889 MW

5. Amount of LTTR remaining after curtailment:

26-05-2026 00:00 - 01:00 1416 MW

26-05-2026 01:00 - 02:00 1416 MW

26-05-2026 02:00 - 03:00 1416 MW

26-05-2026 03:00 - 04:00 1416 MW

26-05-2026 04:00 - 05:00 1416 MW

26-05-2026 05:00 - 06:00 1416 MW

26-05-2026 06:00 - 07:00 1416 MW

26-05-2026 07:00 - 08:00 1416 MW

26-05-2026 08:00 - 09:00 1416 MW

26-05-2026 09:00 - 10:00 1416 MW

26-05-2026 10:00 - 11:00 1416 MW

26-05-2026 11:00 - 12:00 1416 MW

26-05-2026 12:00 - 13:00 1416 MW

26-05-2026 13:00 - 14:00 1416 MW

26-05-2026 14:00 - 15:00 1416 MW

26-05-2026 15:00 - 16:00 1416 MW

26-05-2026 16:00 - 17:00 1416 MW

26-05-2026 17:00 - 18:00 1416 MW

26-05-2026 18:00 - 19:00 1416 MW

26-05-2026 19:00 - 20:00 1416 MW

26-05-2026 20:00 - 21:00 1416 MW

26-05-2026 21:00 - 22:00 1416 MW

26-05-2026 22:00 - 23:00 1416 MW

26-05-2026 23:00 - 24:00 1416 MW

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

Thermal Limits

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

Capacity limitation due to unplanned maintenance

*According to section 57.3 of the EU HAR, this field can be filled in within 24 hours after the initial publication

Capacity Curtailment on the IF1-FR-GB border for delivery period 26-05-2026

by JAO

1. TSO(s)*:

RNP

2. Identification of affected Long Term Transmission Rights:

IF1-FR-GB

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

26-05-2026 00:00 - 01:00 1900 MW

26-05-2026 01:00 - 02:00 1900 MW

26-05-2026 02:00 - 03:00 1900 MW

26-05-2026 03:00 - 04:00 1900 MW

26-05-2026 04:00 - 05:00 1900 MW

26-05-2026 05:00 - 06:00 1900 MW

26-05-2026 06:00 - 07:00 1900 MW

26-05-2026 07:00 - 08:00 1900 MW

26-05-2026 08:00 - 09:00 1900 MW

26-05-2026 09:00 - 10:00 1900 MW

26-05-2026 10:00 - 11:00 1900 MW

26-05-2026 11:00 - 12:00 1900 MW

26-05-2026 12:00 - 13:00 1900 MW

26-05-2026 13:00 - 14:00 1900 MW

26-05-2026 14:00 - 15:00 1900 MW

26-05-2026 15:00 - 16:00 1900 MW

26-05-2026 16:00 - 17:00 1900 MW

26-05-2026 17:00 - 18:00 1900 MW

26-05-2026 18:00 - 19:00 1900 MW

26-05-2026 19:00 - 20:00 1900 MW

26-05-2026 20:00 - 21:00 1900 MW

26-05-2026 21:00 - 22:00 1900 MW

26-05-2026 22:00 - 23:00 1900 MW

26-05-2026 23:00 - 24:00 1900 MW

5. Amount of LTTR remaining after curtailment:

26-05-2026 00:00 - 01:00 1448 MW

26-05-2026 01:00 - 02:00 1448 MW

26-05-2026 02:00 - 03:00 1448 MW

26-05-2026 03:00 - 04:00 1448 MW

26-05-2026 04:00 - 05:00 1448 MW

26-05-2026 05:00 - 06:00 1448 MW

26-05-2026 06:00 - 07:00 1448 MW

26-05-2026 07:00 - 08:00 1448 MW

26-05-2026 08:00 - 09:00 1448 MW

26-05-2026 09:00 - 10:00 1448 MW

26-05-2026 10:00 - 11:00 1448 MW

26-05-2026 11:00 - 12:00 1448 MW

26-05-2026 12:00 - 13:00 1448 MW

26-05-2026 13:00 - 14:00 1448 MW

26-05-2026 14:00 - 15:00 1448 MW

26-05-2026 15:00 - 16:00 1448 MW

26-05-2026 16:00 - 17:00 1448 MW

26-05-2026 17:00 - 18:00 1448 MW

26-05-2026 18:00 - 19:00 1448 MW

26-05-2026 19:00 - 20:00 1448 MW

26-05-2026 20:00 - 21:00 1448 MW

26-05-2026 21:00 - 22:00 1448 MW

26-05-2026 22:00 - 23:00 1448 MW

26-05-2026 23:00 - 24:00 1448 MW

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

Thermal Limits

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

Capacity limitation due to unplanned maintenance

*According to section 57.3 of the EU HAR, this field can be filled in within 24 hours after the initial publication

SDAC_JAO_01: SDAC market coupling 12/05 - Session complete

by JAO

Please be informed that the Day-Ahead market coupling session is now completed.

UMM_01a: Delay in final Market Coupling Results publication

by JAO

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

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

Please follow the local auction rules.expressed as CET timings!

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

[ExC_02]: Delay in Market Coupling Results publication

by JAO

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. 

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

If needed, another delay message will be sent out.

Capacity Curtailment on the FR-ES border for delivery period 13-05-2026

by JAO

1. TSO(s)*:

RTE, REE

2. Identification of affected Long Term Transmission Rights:

FR-ES

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

13-05-2026 00:00 - 01:00 2068 MW

13-05-2026 01:00 - 02:00 2068 MW

13-05-2026 02:00 - 03:00 2068 MW

13-05-2026 03:00 - 04:00 2068 MW

13-05-2026 04:00 - 05:00 2068 MW

13-05-2026 05:00 - 06:00 2068 MW

5. Amount of LTTR remaining after curtailment:

13-05-2026 00:00 - 01:00 670 MW

13-05-2026 01:00 - 02:00 670 MW

13-05-2026 02:00 - 03:00 670 MW

13-05-2026 03:00 - 04:00 670 MW

13-05-2026 04:00 - 05:00 357 MW

13-05-2026 05:00 - 06:00 357 MW

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

13/05/2026

      00:00-01:00 Network Security

      01:00-02:00 Network Security

      02:00-03:00 Network Security

      03:00-04:00 Network Security

      04:00-05:00 Network Security

      05:00-06:00 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

*According to section 57.3 of the EU HAR, this field can be filled in within 24 hours after the initial publication

Capacity Curtailment on the ES-FR border for delivery period 13-05-2026

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:

13-05-2026 11:00 - 12:00 680 MW

13-05-2026 12:00 - 13:00 680 MW

13-05-2026 13:00 - 14:00 680 MW

13-05-2026 14:00 - 15:00 680 MW

13-05-2026 15:00 - 16:00 680 MW

13-05-2026 16:00 - 17:00 680 MW

5. Amount of LTTR remaining after curtailment:

13-05-2026 11:00 - 12:00 481 MW

13-05-2026 12:00 - 13:00 481 MW

13-05-2026 13:00 - 14:00 481 MW

13-05-2026 14:00 - 15:00 481 MW

13-05-2026 15:00 - 16:00 481 MW

13-05-2026 16:00 - 17:00 481 MW

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

13/05/2026

      11:00-12:00 BRAUD-PREGUILLAC 2

      12:00-13:00 BRAUD-PREGUILLAC 2

      13:00-14:00 BRAUD-PREGUILLAC 2

      14:00-15:00 BRAUD-PREGUILLAC 2

      15:00-16:00 BRAUD-PREGUILLAC 2

      16:00-17:00 BRAUD-PREGUILLAC 2

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

*According to section 57.3 of the EU HAR, this field can be filled in within 24 hours after the initial publication

Resource Center

This section contains key information for market participants such as user guides, forms, auction rules, nomination deadlines and other documents.

Go to resources

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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We created a user guide to support the onboarding of market participants. Learn more about the steps to register, the required documents and our service desk platform.

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Frequently asked questions

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

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