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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

Capacity Curtailment on the IF2-GB-FR and IF2-FR-GB border for delivery period 01-12-2025

by JAO

1. TSO(s)*:

National Grid Interconnectors Limited (NGIC) and RTE EDF Transport S.A. (RTE)

2. Identification of affected Long Term Transmission Rights:

IF2-GB-FR

IF2-FR-GB

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

01-12-2025 00:00 - 01:00 574 MW

01-12-2025 01:00 - 02:00 574 MW

01-12-2025 02:00 - 03:00 574 MW

01-12-2025 03:00 - 04:00 574 MW

01-12-2025 04:00 - 05:00 574 MW

01-12-2025 05:00 - 06:00 574 MW

01-12-2025 06:00 - 07:00 574 MW

01-12-2025 07:00 - 08:00 574 MW

01-12-2025 08:00 - 09:00 574 MW

5. Amount of LTTR remaining after curtailment:

01-12-2025 00:00 - 01:00 0 MW

01-12-2025 01:00 - 02:00 0 MW

01-12-2025 02:00 - 03:00 0 MW

01-12-2025 03:00 - 04:00 0 MW

01-12-2025 04:00 - 05:00 0 MW

01-12-2025 05:00 - 06:00 0 MW

01-12-2025 06:00 - 07:00 0 MW

01-12-2025 07:00 - 08:00 0 MW

01-12-2025 08:00 - 09:00 0 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 IF2-GB-FR and IF2-FR-GB border for delivery period 28-10-2025 to 30-11-2025

by JAO

1. TSO(s)*:

National Grid Interconnectors Limited (NGIC) and RTE EDF Transport S.A. (RTE)

2. Identification of affected Long Term Transmission Rights:

IF2-GB-FR

IF2-FR-GB

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

28-10-2025 to 30-11-2025

00:00 - 01:00 574 MW

01:00 - 02:00 574 MW

02:00 - 03:00 574 MW

03:00 - 04:00 574 MW

04:00 - 05:00 574 MW

05:00 - 06:00 574 MW

06:00 - 07:00 574 MW

07:00 - 08:00 574 MW

08:00 - 09:00 574 MW

09:00 - 10:00 574 MW

10:00 - 11:00 574 MW

11:00 - 12:00 574 MW

12:00 - 13:00 574 MW

13:00 - 14:00 574 MW

14:00 - 15:00 574 MW

15:00 - 16:00 574 MW

16:00 - 17:00 574 MW

17:00 - 18:00 574 MW

18:00 - 19:00 574 MW

19:00 - 20:00 574 MW

20:00 - 21:00 574 MW

21:00 - 22:00 574 MW

22:00 - 23:00 574 MW

23:00 - 24:00 574 MW

5. Amount of LTTR remaining after curtailment:

28-10-2025 to 30-11-2025

00:00 - 01:00 0 MW

01:00 - 02:00 0 MW

02:00 - 03:00 0 MW

03:00 - 04:00 0 MW

04:00 - 05:00 0 MW

05:00 - 06:00 0 MW

06:00 - 07:00 0 MW

07:00 - 08:00 0 MW

08:00 - 09:00 0 MW

09:00 - 10:00 0 MW

10:00 - 11:00 0 MW

11:00 - 12:00 0 MW

12:00 - 13:00 0 MW

13:00 - 14:00 0 MW

14:00 - 15:00 0 MW

15:00 - 16:00 0 MW

16:00 - 17:00 0 MW

17:00 - 18:00 0 MW

18:00 - 19:00 0 MW

19:00 - 20:00 0 MW

20:00 - 21:00 0 MW

21:00 - 22:00 0 MW

22:00 - 23:00 0 MW

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*:

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 IF2-GB-FR and IF2-FR-GB border for delivery period 27-10-2025

by JAO

1. TSO(s)*:

National Grid Interconnectors Limited (NGIC) and RTE EDF Transport S.A. (RTE)

2. Identification of affected Long Term Transmission Rights:

IF2-GB-FR

IF2-FR-GB

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

27-10-2025 07:00 - 08:00 574 MW

27-10-2025 08:00 - 09:00 574 MW

27-10-2025 09:00 - 10:00 574 MW

27-10-2025 10:00 - 11:00 574 MW

27-10-2025 11:00 - 12:00 574 MW

27-10-2025 12:00 - 13:00 574 MW

27-10-2025 13:00 - 14:00 574 MW

27-10-2025 14:00 - 15:00 574 MW

27-10-2025 15:00 - 16:00 574 MW

27-10-2025 16:00 - 17:00 574 MW

27-10-2025 17:00 - 18:00 574 MW

27-10-2025 18:00 - 19:00 574 MW

27-10-2025 19:00 - 20:00 574 MW

27-10-2025 20:00 - 21:00 574 MW

27-10-2025 21:00 - 22:00 574 MW

27-10-2025 22:00 - 23:00 574 MW

27-10-2025 23:00 - 24:00 574 MW

5. Amount of LTTR remaining after curtailment:

27-10-2025 07:00 - 08:00 0 MW

27-10-2025 08:00 - 09:00 0 MW

27-10-2025 09:00 - 10:00 0 MW

27-10-2025 10:00 - 11:00 0 MW

27-10-2025 11:00 - 12:00 0 MW

27-10-2025 12:00 - 13:00 0 MW

27-10-2025 13:00 - 14:00 0 MW

27-10-2025 14:00 - 15:00 0 MW

27-10-2025 15:00 - 16:00 0 MW

27-10-2025 16:00 - 17:00 0 MW

27-10-2025 17:00 - 18:00 0 MW

27-10-2025 18:00 - 19:00 0 MW

27-10-2025 19:00 - 20:00 0 MW

27-10-2025 20:00 - 21:00 0 MW

27-10-2025 21:00 - 22:00 0 MW

27-10-2025 22:00 - 23:00 0 MW

27-10-2025 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*:

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 HU-AT border for delivery period 09-08-2025

by JAO

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

HU-AT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

09-08-2025 08:00 - 09:00 249 MW

09-08-2025 09:00 - 10:00 249 MW

09-08-2025 10:00 - 11:00 249 MW

09-08-2025 13:00 - 14:00 249 MW

5. Amount of LTTR remaining after curtailment:

09-08-2025 08:00 - 09:00 163 MW

09-08-2025 09:00 - 10:00 182 MW

09-08-2025 10:00 - 11:00 161 MW

09-08-2025 13:00 - 14:00 233 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.

*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 SI-AT border for delivery period 09-08-2025

by JAO

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

SI-AT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

09-08-2025 08:00 - 09:00 299 MW

09-08-2025 09:00 - 10:00 299 MW

09-08-2025 10:00 - 11:00 299 MW

09-08-2025 11:00 - 12:00 299 MW

09-08-2025 12:00 - 13:00 299 MW

09-08-2025 13:00 - 14:00 299 MW

09-08-2025 14:00 - 15:00 299 MW

09-08-2025 15:00 - 16:00 299 MW

5. Amount of LTTR remaining after curtailment:

09-08-2025 08:00 - 09:00 97 MW

09-08-2025 09:00 - 10:00 116 MW

09-08-2025 10:00 - 11:00 98 MW

09-08-2025 11:00 - 12:00 154 MW

09-08-2025 12:00 - 13:00 150 MW

09-08-2025 13:00 - 14:00 143 MW

09-08-2025 14:00 - 15:00 145 MW

09-08-2025 15:00 - 16:00 154 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.

*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 AT-CZ border for delivery period 09-08-2025

by JAO

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

AT-CZ

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

09-08-2025 08:00 - 09:00 350 MW

09-08-2025 09:00 - 10:00 350 MW

09-08-2025 10:00 - 11:00 350 MW

09-08-2025 11:00 - 12:00 350 MW

09-08-2025 12:00 - 13:00 350 MW

09-08-2025 13:00 - 14:00 350 MW

09-08-2025 14:00 - 15:00 350 MW

09-08-2025 15:00 - 16:00 350 MW

5. Amount of LTTR remaining after curtailment:

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

09-08-2025 09:00 - 10:00 76 MW

09-08-2025 10:00 - 11:00 93 MW

09-08-2025 11:00 - 12:00 143 MW

09-08-2025 12:00 - 13:00 145 MW

09-08-2025 13:00 - 14:00 144 MW

09-08-2025 14:00 - 15:00 146 MW

09-08-2025 15:00 - 16:00 146 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.

*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 AT-DE border for delivery period 09-08-2025

by JAO

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

AT-DE

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

09-08-2025 08:00 - 09:00 3537 MW

09-08-2025 09:00 - 10:00 3537 MW

09-08-2025 10:00 - 11:00 3537 MW

09-08-2025 11:00 - 12:00 3537 MW

09-08-2025 12:00 - 13:00 3537 MW

09-08-2025 13:00 - 14:00 3537 MW

09-08-2025 14:00 - 15:00 3537 MW

09-08-2025 15:00 - 16:00 3537 MW

5. Amount of LTTR remaining after curtailment:

09-08-2025 08:00 - 09:00 1186 MW

09-08-2025 09:00 - 10:00 1183 MW

09-08-2025 10:00 - 11:00 1404 MW

09-08-2025 11:00 - 12:00 1865 MW

09-08-2025 12:00 - 13:00 1923 MW

09-08-2025 13:00 - 14:00 1968 MW

09-08-2025 14:00 - 15:00 1918 MW

09-08-2025 15:00 - 16:00 2024 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.

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

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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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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