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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 AT-IT border for delivery period 18-12-2025

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:

18-12-2025 00:00 - 01:00 204 MW

18-12-2025 01:00 - 02:00 204 MW

18-12-2025 02:00 - 03:00 204 MW

18-12-2025 03:00 - 04:00 204 MW

18-12-2025 04:00 - 05:00 204 MW

18-12-2025 05:00 - 06:00 204 MW

18-12-2025 06:00 - 07:00 204 MW

18-12-2025 07:00 - 08:00 204 MW

18-12-2025 08:00 - 09:00 204 MW

18-12-2025 09:00 - 10:00 204 MW

18-12-2025 10:00 - 11:00 204 MW

18-12-2025 11:00 - 12:00 204 MW

18-12-2025 12:00 - 13:00 204 MW

18-12-2025 13:00 - 14:00 204 MW

18-12-2025 14:00 - 15:00 204 MW

18-12-2025 15:00 - 16:00 204 MW

18-12-2025 16:00 - 17:00 204 MW

5. Amount of LTTR remaining after curtailment:

18-12-2025 00:00 - 01:00 121 MW

18-12-2025 01:00 - 02:00 121 MW

18-12-2025 02:00 - 03:00 121 MW

18-12-2025 03:00 - 04:00 128 MW

18-12-2025 04:00 - 05:00 128 MW

18-12-2025 05:00 - 06:00 128 MW

18-12-2025 06:00 - 07:00 128 MW

18-12-2025 07:00 - 08:00 134 MW

18-12-2025 08:00 - 09:00 134 MW

18-12-2025 09:00 - 10:00 128 MW

18-12-2025 10:00 - 11:00 128 MW

18-12-2025 11:00 - 12:00 128 MW

18-12-2025 12:00 - 13:00 105 MW

18-12-2025 13:00 - 14:00 105 MW

18-12-2025 14:00 - 15:00 105 MW

18-12-2025 15:00 - 16:00 117 MW

18-12-2025 16:00 - 17:00 117 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

*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 IT-AT border for delivery period 18-12-2025

by JAO

1. TSO(s)*:

TERNA

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:

18-12-2025 00:00 - 01:00 81 MW

18-12-2025 01:00 - 02:00 81 MW

18-12-2025 02:00 - 03:00 81 MW

18-12-2025 03:00 - 04:00 81 MW

18-12-2025 04:00 - 05:00 81 MW

18-12-2025 05:00 - 06:00 81 MW

18-12-2025 06:00 - 07:00 81 MW

18-12-2025 07:00 - 08:00 81 MW

18-12-2025 08:00 - 09:00 81 MW

18-12-2025 09:00 - 10:00 81 MW

18-12-2025 10:00 - 11:00 81 MW

18-12-2025 11:00 - 12:00 81 MW

18-12-2025 12:00 - 13:00 81 MW

18-12-2025 13:00 - 14:00 81 MW

18-12-2025 14:00 - 15:00 81 MW

18-12-2025 15:00 - 16:00 81 MW

18-12-2025 16:00 - 17:00 81 MW

5. Amount of LTTR remaining after curtailment:

18-12-2025 00:00 - 01:00 57 MW

18-12-2025 01:00 - 02:00 57 MW

18-12-2025 02:00 - 03:00 57 MW

18-12-2025 03:00 - 04:00 57 MW

18-12-2025 04:00 - 05:00 57 MW

18-12-2025 05:00 - 06:00 57 MW

18-12-2025 06:00 - 07:00 57 MW

18-12-2025 07:00 - 08:00 26 MW

18-12-2025 08:00 - 09:00 26 MW

18-12-2025 09:00 - 10:00 26 MW

18-12-2025 10:00 - 11:00 26 MW

18-12-2025 11:00 - 12:00 26 MW

18-12-2025 12:00 - 13:00 26 MW

18-12-2025 13:00 - 14:00 26 MW

18-12-2025 14:00 - 15:00 26 MW

18-12-2025 15:00 - 16:00 26 MW

18-12-2025 16:00 - 17:00 26 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

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

Delay in Rights Documents Distribution for NLL ID 00-06 for mkt period 17/12

by JAO

We are currently experiencing technical issues with the distribution of the Rights Documents for the following auctions:

NLL-BE-GB-I-ID0006-251217-01

NLL-GB-BE-I-ID0006-251217-01

We kindly request that you please download the files directly from the Trader UI.

Thank you for your cooperation.

eCAT Downtime on 17/12/2025

by JAO

Please be advised that an intervention is scheduled for 17/12/2025, starting at 20:00.

During this time, eCAT access will be unavailable between 20:00 and 21:30.

We appreciate your understanding as we work to enhance our services.

Operations Team

Capacity Curtailment on the IT-AT border for delivery period 17-12-2025

by JAO

1. TSO(s)*:

TERNA

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:

17-12-2025 00:00 - 01:00 81 MW

17-12-2025 01:00 - 02:00 81 MW

17-12-2025 02:00 - 03:00 81 MW

17-12-2025 03:00 - 04:00 81 MW

17-12-2025 04:00 - 05:00 81 MW

17-12-2025 05:00 - 06:00 81 MW

17-12-2025 06:00 - 07:00 81 MW

17-12-2025 07:00 - 08:00 81 MW

17-12-2025 08:00 - 09:00 81 MW

17-12-2025 09:00 - 10:00 81 MW

17-12-2025 10:00 - 11:00 81 MW

17-12-2025 11:00 - 12:00 81 MW

17-12-2025 12:00 - 13:00 81 MW

17-12-2025 13:00 - 14:00 81 MW

17-12-2025 14:00 - 15:00 81 MW

17-12-2025 15:00 - 16:00 81 MW

17-12-2025 16:00 - 17:00 81 MW

17-12-2025 17:00 - 18:00 81 MW

17-12-2025 18:00 - 19:00 81 MW

17-12-2025 19:00 - 20:00 81 MW

17-12-2025 20:00 - 21:00 81 MW

17-12-2025 21:00 - 22:00 81 MW

17-12-2025 22:00 - 23:00 81 MW

17-12-2025 23:00 - 24:00 81 MW

5. Amount of LTTR remaining after curtailment:

17-12-2025 00:00 - 01:00 11 MW

17-12-2025 01:00 - 02:00 11 MW

17-12-2025 02:00 - 03:00 11 MW

17-12-2025 03:00 - 04:00 11 MW

17-12-2025 04:00 - 05:00 11 MW

17-12-2025 05:00 - 06:00 11 MW

17-12-2025 06:00 - 07:00 11 MW

17-12-2025 07:00 - 08:00 11 MW

17-12-2025 08:00 - 09:00 11 MW

17-12-2025 09:00 - 10:00 11 MW

17-12-2025 10:00 - 11:00 11 MW

17-12-2025 11:00 - 12:00 11 MW

17-12-2025 12:00 - 13:00 7 MW

17-12-2025 13:00 - 14:00 7 MW

17-12-2025 14:00 - 15:00 7 MW

17-12-2025 15:00 - 16:00 11 MW

17-12-2025 16:00 - 17:00 11 MW

17-12-2025 17:00 - 18:00 26 MW

17-12-2025 18:00 - 19:00 26 MW

17-12-2025 19:00 - 20:00 26 MW

17-12-2025 20:00 - 21:00 26 MW

17-12-2025 21:00 - 22:00 26 MW

17-12-2025 22:00 - 23:00 26 MW

17-12-2025 23:00 - 24:00 57 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

*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-IT border for delivery period 17-12-2025

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:

17-12-2025 00:00 - 01:00 204 MW

17-12-2025 01:00 - 02:00 204 MW

17-12-2025 02:00 - 03:00 204 MW

17-12-2025 03:00 - 04:00 204 MW

17-12-2025 04:00 - 05:00 204 MW

17-12-2025 05:00 - 06:00 204 MW

17-12-2025 06:00 - 07:00 204 MW

17-12-2025 07:00 - 08:00 204 MW

17-12-2025 08:00 - 09:00 204 MW

17-12-2025 09:00 - 10:00 204 MW

17-12-2025 10:00 - 11:00 204 MW

17-12-2025 11:00 - 12:00 204 MW

17-12-2025 12:00 - 13:00 204 MW

17-12-2025 13:00 - 14:00 204 MW

17-12-2025 14:00 - 15:00 204 MW

17-12-2025 15:00 - 16:00 204 MW

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

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

17-12-2025 18:00 - 19:00 204 MW

17-12-2025 19:00 - 20:00 204 MW

17-12-2025 20:00 - 21:00 204 MW

17-12-2025 21:00 - 22:00 204 MW

17-12-2025 22:00 - 23:00 204 MW

17-12-2025 23:00 - 24:00 204 MW

5. Amount of LTTR remaining after curtailment:

17-12-2025 00:00 - 01:00 47 MW

17-12-2025 01:00 - 02:00 47 MW

17-12-2025 02:00 - 03:00 47 MW

17-12-2025 03:00 - 04:00 47 MW

17-12-2025 04:00 - 05:00 47 MW

17-12-2025 05:00 - 06:00 47 MW

17-12-2025 06:00 - 07:00 47 MW

17-12-2025 07:00 - 08:00 18 MW

17-12-2025 08:00 - 09:00 18 MW

17-12-2025 09:00 - 10:00 47 MW

17-12-2025 10:00 - 11:00 47 MW

17-12-2025 11:00 - 12:00 47 MW

17-12-2025 12:00 - 13:00 44 MW

17-12-2025 13:00 - 14:00 44 MW

17-12-2025 14:00 - 15:00 44 MW

17-12-2025 15:00 - 16:00 18 MW

17-12-2025 16:00 - 17:00 18 MW

17-12-2025 17:00 - 18:00 58 MW

17-12-2025 18:00 - 19:00 123 MW

17-12-2025 19:00 - 20:00 123 MW

17-12-2025 20:00 - 21:00 123 MW

17-12-2025 21:00 - 22:00 134 MW

17-12-2025 22:00 - 23:00 134 MW

17-12-2025 23:00 - 24:00 128 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

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

Delay in Rights Documents Distribution for NLL ID 00-06 for mkt period 16/12

by JAO

We are currently experiencing technical issues with the distribution of the Rights Documents for the following auctions:

NLL-BE-GB-I-ID0006-251216-01

NLL-GB-BE-I-ID0006-251216-01

We kindly request that you please download the files directly from the Trader UI.

Thank you for your cooperation.

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.

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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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