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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

Capacity Curtailment on the FR-ES border for delivery period 13-08-2026

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:

13-08-2026 00:00 - 01:00 1559 MW

13-08-2026 01:00 - 02:00 1559 MW

13-08-2026 02:00 - 03:00 1559 MW

13-08-2026 03:00 - 04:00 1559 MW

13-08-2026 04:00 - 05:00 1559 MW

13-08-2026 05:00 - 06:00 1559 MW

13-08-2026 06:00 - 07:00 1559 MW

13-08-2026 07:00 - 08:00 1559 MW

13-08-2026 08:00 - 09:00 1559 MW

13-08-2026 09:00 - 10:00 1559 MW

13-08-2026 10:00 - 11:00 1559 MW

13-08-2026 11:00 - 12:00 1559 MW

13-08-2026 12:00 - 13:00 1559 MW

13-08-2026 13:00 - 14:00 1559 MW

13-08-2026 14:00 - 15:00 1559 MW

13-08-2026 15:00 - 16:00 1559 MW

13-08-2026 16:00 - 17:00 1559 MW

13-08-2026 17:00 - 18:00 1559 MW

13-08-2026 18:00 - 19:00 1559 MW

13-08-2026 19:00 - 20:00 1559 MW

13-08-2026 20:00 - 21:00 1559 MW

13-08-2026 21:00 - 22:00 1559 MW

13-08-2026 22:00 - 23:00 1559 MW

13-08-2026 23:00 - 24:00 1559 MW

5. Amount of LTTR remaining after curtailment:

13-08-2026 00:00 - 01:00 1072 MW

13-08-2026 01:00 - 02:00 1072 MW

13-08-2026 02:00 - 03:00 1072 MW

13-08-2026 03:00 - 04:00 1072 MW

13-08-2026 04:00 - 05:00 1072 MW

13-08-2026 05:00 - 06:00 1072 MW

13-08-2026 06:00 - 07:00 1072 MW

13-08-2026 07:00 - 08:00 1072 MW

13-08-2026 08:00 - 09:00 1072 MW

13-08-2026 09:00 - 10:00 1467 MW

13-08-2026 10:00 - 11:00 1467 MW

13-08-2026 11:00 - 12:00 1467 MW

13-08-2026 12:00 - 13:00 1467 MW

13-08-2026 13:00 - 14:00 1467 MW

13-08-2026 14:00 - 15:00 1467 MW

13-08-2026 15:00 - 16:00 1467 MW

13-08-2026 16:00 - 17:00 1467 MW

13-08-2026 17:00 - 18:00 1467 MW

13-08-2026 18:00 - 19:00 1467 MW

13-08-2026 19:00 - 20:00 563 MW

13-08-2026 20:00 - 21:00 563 MW

13-08-2026 21:00 - 22:00 563 MW

13-08-2026 22:00 - 23:00 563 MW

13-08-2026 23:00 - 24:00 563 MW

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

13/08/2026

      00:00-01:00 BRAUD - CUBNEZAIS 4

      01:00-02:00 BRAUD - CUBNEZAIS 4

      02:00-03:00 BRAUD - CUBNEZAIS 4

      03:00-04:00 BRAUD - CUBNEZAIS 4

      04:00-05:00 BRAUD - CUBNEZAIS 4

      05:00-06:00 BRAUD - CUBNEZAIS 4

      06:00-07:00 BRAUD - CUBNEZAIS 4

      07:00-08:00 BRAUD - CUBNEZAIS 4

      08:00-09:00 BRAUD - CUBNEZAIS 4

      09:00-10:00 BRAUD - CUBNEZAIS 4

      10:00-11:00 BRAUD - CUBNEZAIS 4

      11:00-12:00 BRAUD - CUBNEZAIS 4

      12:00-13:00 BRAUD - CUBNEZAIS 4

      13:00-14:00 BRAUD - CUBNEZAIS 4

      14:00-15:00 BRAUD - CUBNEZAIS 4

      15:00-16:00 BRAUD - CUBNEZAIS 4

      16:00-17:00 BRAUD - CUBNEZAIS 4

      17:00-18:00 BRAUD - CUBNEZAIS 4

      18:00-19:00 BRAUD - CUBNEZAIS 4

      19:00-20:00 BRAUD - CUBNEZAIS 4

      20:00-21:00 BRAUD - CUBNEZAIS 4

      21:00-22:00 BRAUD - CUBNEZAIS 4

      22:00-23:00 BRAUD - CUBNEZAIS 4

      23:00-24:00 BRAUD - CUBNEZAIS 4

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 13-08-2026

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:

13-08-2026 11:00 - 12:00 674 MW

13-08-2026 12:00 - 13:00 674 MW

13-08-2026 13:00 - 14:00 674 MW

13-08-2026 14:00 - 15:00 674 MW

13-08-2026 15:00 - 16:00 674 MW

13-08-2026 16:00 - 17:00 674 MW

5. Amount of LTTR remaining after curtailment:

13-08-2026 11:00 - 12:00 276 MW

13-08-2026 12:00 - 13:00 276 MW

13-08-2026 13:00 - 14:00 276 MW

13-08-2026 14:00 - 15:00 276 MW

13-08-2026 15:00 - 16:00 276 MW

13-08-2026 16:00 - 17:00 276 MW

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

   13/08/2026

      11:00-12:00 Dambron - Verger

      12:00-13:00 Dambron - Verger

      13:00-14:00 Dambron - Verger

      14:00-15:00 Dambron - Verger

      15:00-16:00 Dambron - Verger

      16:00-17:00 Dambron - Verger

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 FR-CH border for delivery period 13-08-2026

by JAO

1. TSO(s)*:

RTE, SWISSGRID

2. Identification of affected Long Term Transmission Rights:

FR-CH

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

13-08-2026 00:00 - 01:00 370 MW

13-08-2026 01:00 - 02:00 370 MW

13-08-2026 02:00 - 03:00 370 MW

13-08-2026 03:00 - 04:00 370 MW

13-08-2026 04:00 - 05:00 370 MW

13-08-2026 05:00 - 06:00 370 MW

13-08-2026 06:00 - 07:00 370 MW

13-08-2026 07:00 - 08:00 370 MW

13-08-2026 08:00 - 09:00 370 MW

13-08-2026 09:00 - 10:00 370 MW

13-08-2026 10:00 - 11:00 370 MW

13-08-2026 11:00 - 12:00 370 MW

13-08-2026 12:00 - 13:00 370 MW

13-08-2026 13:00 - 14:00 370 MW

13-08-2026 14:00 - 15:00 370 MW

13-08-2026 15:00 - 16:00 370 MW

13-08-2026 16:00 - 17:00 370 MW

13-08-2026 17:00 - 18:00 370 MW

13-08-2026 18:00 - 19:00 370 MW

13-08-2026 19:00 - 20:00 370 MW

13-08-2026 20:00 - 21:00 370 MW

13-08-2026 21:00 - 22:00 370 MW

13-08-2026 22:00 - 23:00 370 MW

13-08-2026 23:00 - 24:00 370 MW

5. Amount of LTTR remaining after curtailment:

13-08-2026 00:00 - 01:00 0 MW

13-08-2026 01:00 - 02:00 0 MW

13-08-2026 02:00 - 03:00 0 MW

13-08-2026 03:00 - 04:00 0 MW

13-08-2026 04:00 - 05:00 0 MW

13-08-2026 05:00 - 06:00 0 MW

13-08-2026 06:00 - 07:00 0 MW

13-08-2026 07:00 - 08:00 0 MW

13-08-2026 08:00 - 09:00 0 MW

13-08-2026 09:00 - 10:00 0 MW

13-08-2026 10:00 - 11:00 0 MW

13-08-2026 11:00 - 12:00 0 MW

13-08-2026 12:00 - 13:00 0 MW

13-08-2026 13:00 - 14:00 0 MW

13-08-2026 14:00 - 15:00 0 MW

13-08-2026 15:00 - 16:00 0 MW

13-08-2026 16:00 - 17:00 0 MW

13-08-2026 17:00 - 18:00 0 MW

13-08-2026 18:00 - 19:00 0 MW

13-08-2026 19:00 - 20:00 0 MW

13-08-2026 20:00 - 21:00 0 MW

13-08-2026 21:00 - 22:00 0 MW

13-08-2026 22:00 - 23:00 0 MW

13-08-2026 23:00 - 24:00 0 MW

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

   13/08/2026

      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

      06:00-07:00 Network Security

      07:00-08:00 Network Security

      08:00-09:00 Network Security

      09:00-10:00 Network Security

      10:00-11:00 Network Security

      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

*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-GB-FR border for delivery period 19-08-2026

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:

19-08-2026 00:00 - 01:00 1896 MW

19-08-2026 01:00 - 02:00 1896 MW

19-08-2026 02:00 - 03:00 1896 MW

19-08-2026 03:00 - 04:00 1896 MW

19-08-2026 04:00 - 05:00 1896 MW

19-08-2026 05:00 - 06:00 1896 MW

19-08-2026 06:00 - 07:00 1896 MW

19-08-2026 07:00 - 08:00 1896 MW

19-08-2026 08:00 - 09:00 1896 MW

19-08-2026 09:00 - 10:00 1896 MW

19-08-2026 10:00 - 11:00 1896 MW

19-08-2026 11:00 - 12:00 1896 MW

19-08-2026 12:00 - 13:00 1896 MW

19-08-2026 13:00 - 14:00 1896 MW

19-08-2026 14:00 - 15:00 1896 MW

19-08-2026 15:00 - 16:00 1896 MW

19-08-2026 16:00 - 17:00 1896 MW

5. Amount of LTTR remaining after curtailment:

19-08-2026 00:00 - 01:00 946 MW

19-08-2026 01:00 - 02:00 946 MW

19-08-2026 02:00 - 03:00 946 MW

19-08-2026 03:00 - 04:00 946 MW

19-08-2026 04:00 - 05:00 946 MW

19-08-2026 05:00 - 06:00 946 MW

19-08-2026 06:00 - 07:00 946 MW

19-08-2026 07:00 - 08:00 946 MW

19-08-2026 08:00 - 09:00 946 MW

19-08-2026 09:00 - 10:00 946 MW

19-08-2026 10:00 - 11:00 946 MW

19-08-2026 11:00 - 12:00 946 MW

19-08-2026 12:00 - 13:00 946 MW

19-08-2026 13:00 - 14:00 946 MW

19-08-2026 14:00 - 15:00 946 MW

19-08-2026 15:00 - 16:00 946 MW

19-08-2026 16:00 - 17:00 946 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 planned 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 19-08-2026

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:

19-08-2026 00:00 - 01:00 1900 MW

19-08-2026 01:00 - 02:00 1900 MW

19-08-2026 02:00 - 03:00 1900 MW

19-08-2026 03:00 - 04:00 1900 MW

19-08-2026 04:00 - 05:00 1900 MW

19-08-2026 05:00 - 06:00 1900 MW

19-08-2026 06:00 - 07:00 1900 MW

19-08-2026 07:00 - 08:00 1900 MW

19-08-2026 08:00 - 09:00 1900 MW

19-08-2026 09:00 - 10:00 1900 MW

19-08-2026 10:00 - 11:00 1900 MW

19-08-2026 11:00 - 12:00 1900 MW

19-08-2026 12:00 - 13:00 1900 MW

19-08-2026 13:00 - 14:00 1900 MW

19-08-2026 14:00 - 15:00 1900 MW

19-08-2026 15:00 - 16:00 1900 MW

19-08-2026 16:00 - 17:00 1900 MW

5. Amount of LTTR remaining after curtailment:

19-08-2026 00:00 - 01:00 967 MW

19-08-2026 01:00 - 02:00 967 MW

19-08-2026 02:00 - 03:00 967 MW

19-08-2026 03:00 - 04:00 967 MW

19-08-2026 04:00 - 05:00 967 MW

19-08-2026 05:00 - 06:00 967 MW

19-08-2026 06:00 - 07:00 967 MW

19-08-2026 07:00 - 08:00 967 MW

19-08-2026 08:00 - 09:00 967 MW

19-08-2026 09:00 - 10:00 967 MW

19-08-2026 10:00 - 11:00 967 MW

19-08-2026 11:00 - 12:00 967 MW

19-08-2026 12:00 - 13:00 967 MW

19-08-2026 13:00 - 14:00 967 MW

19-08-2026 14:00 - 15:00 967 MW

19-08-2026 15:00 - 16:00 967 MW

19-08-2026 16:00 - 17:00 967 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 planned 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-GB-FR border for delivery period 17-08-2026

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:

17-08-2026 07:00 - 08:00 1896 MW

17-08-2026 08:00 - 09:00 1896 MW

17-08-2026 09:00 - 10:00 1896 MW

17-08-2026 10:00 - 11:00 1896 MW

17-08-2026 11:00 - 12:00 1896 MW

17-08-2026 12:00 - 13:00 1896 MW

17-08-2026 13:00 - 14:00 1896 MW

17-08-2026 14:00 - 15:00 1896 MW

17-08-2026 15:00 - 16:00 1896 MW

17-08-2026 16:00 - 17:00 1896 MW

17-08-2026 17:00 - 18:00 1896 MW

17-08-2026 18:00 - 19:00 1896 MW

17-08-2026 19:00 - 20:00 1896 MW

17-08-2026 20:00 - 21:00 1896 MW

17-08-2026 21:00 - 22:00 1896 MW

17-08-2026 22:00 - 23:00 1896 MW

17-08-2026 23:00 - 24:00 1896 MW

5. Amount of LTTR remaining after curtailment:

17-08-2026 07:00 - 08:00 946 MW

17-08-2026 08:00 - 09:00 946 MW

17-08-2026 09:00 - 10:00 946 MW

17-08-2026 10:00 - 11:00 946 MW

17-08-2026 11:00 - 12:00 946 MW

17-08-2026 12:00 - 13:00 946 MW

17-08-2026 13:00 - 14:00 946 MW

17-08-2026 14:00 - 15:00 946 MW

17-08-2026 15:00 - 16:00 946 MW

17-08-2026 16:00 - 17:00 946 MW

17-08-2026 17:00 - 18:00 946 MW

17-08-2026 18:00 - 19:00 946 MW

17-08-2026 19:00 - 20:00 946 MW

17-08-2026 20:00 - 21:00 946 MW

17-08-2026 21:00 - 22:00 946 MW

17-08-2026 22:00 - 23:00 946 MW

17-08-2026 23:00 - 24:00 946 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 planned 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 17-08-2026

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:

17-08-2026 07:00 - 08:00 1900 MW

17-08-2026 08:00 - 09:00 1900 MW

17-08-2026 09:00 - 10:00 1900 MW

17-08-2026 10:00 - 11:00 1900 MW

17-08-2026 11:00 - 12:00 1900 MW

17-08-2026 12:00 - 13:00 1900 MW

17-08-2026 13:00 - 14:00 1900 MW

17-08-2026 14:00 - 15:00 1900 MW

17-08-2026 15:00 - 16:00 1900 MW

17-08-2026 16:00 - 17:00 1900 MW

17-08-2026 17:00 - 18:00 1900 MW

17-08-2026 18:00 - 19:00 1900 MW

17-08-2026 19:00 - 20:00 1900 MW

17-08-2026 20:00 - 21:00 1900 MW

17-08-2026 21:00 - 22:00 1900 MW

17-08-2026 22:00 - 23:00 1900 MW

17-08-2026 23:00 - 24:00 1900 MW

5. Amount of LTTR remaining after curtailment:

17-08-2026 07:00 - 08:00 967 MW

17-08-2026 08:00 - 09:00 967 MW

17-08-2026 09:00 - 10:00 967 MW

17-08-2026 10:00 - 11:00 967 MW

17-08-2026 11:00 - 12:00 967 MW

17-08-2026 12:00 - 13:00 967 MW

17-08-2026 13:00 - 14:00 967 MW

17-08-2026 14:00 - 15:00 967 MW

17-08-2026 15:00 - 16:00 967 MW

17-08-2026 16:00 - 17:00 967 MW

17-08-2026 17:00 - 18:00 967 MW

17-08-2026 18:00 - 19:00 967 MW

17-08-2026 19:00 - 20:00 967 MW

17-08-2026 20:00 - 21:00 967 MW

17-08-2026 21:00 - 22:00 967 MW

17-08-2026 22:00 - 23:00 967 MW

17-08-2026 23:00 - 24:00 967 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 planned maintenance

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

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