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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 SI-AT border for delivery period 28-12-2025

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:

28-12-2025 02:00 - 03:00 399 MW

28-12-2025 03:00 - 04:00 399 MW

28-12-2025 04:00 - 05:00 399 MW

28-12-2025 05:00 - 06:00 399 MW

28-12-2025 06:00 - 07:00 399 MW

28-12-2025 07:00 - 08:00 399 MW

28-12-2025 08:00 - 09:00 399 MW

28-12-2025 09:00 - 10:00 399 MW

28-12-2025 10:00 - 11:00 399 MW

28-12-2025 11:00 - 12:00 399 MW

28-12-2025 12:00 - 13:00 399 MW

5. Amount of LTTR remaining after curtailment:

28-12-2025 02:00 - 03:00 364 MW

28-12-2025 03:00 - 04:00 364 MW

28-12-2025 04:00 - 05:00 364 MW

28-12-2025 05:00 - 06:00 360 MW

28-12-2025 06:00 - 07:00 364 MW

28-12-2025 07:00 - 08:00 358 MW

28-12-2025 08:00 - 09:00 346 MW

28-12-2025 09:00 - 10:00 194 MW

28-12-2025 10:00 - 11:00 252 MW

28-12-2025 11:00 - 12:00 199 MW

28-12-2025 12:00 - 13:00 236 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-CZ border for delivery period 28-12-2025

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:

28-12-2025 00:00 - 01:00 350 MW

28-12-2025 01:00 - 02:00 350 MW

28-12-2025 02:00 - 03:00 350 MW

28-12-2025 03:00 - 04:00 350 MW

28-12-2025 05:00 - 06:00 350 MW

28-12-2025 07:00 - 08:00 350 MW

28-12-2025 08:00 - 09:00 350 MW

28-12-2025 09:00 - 10:00 350 MW

28-12-2025 10:00 - 11:00 350 MW

28-12-2025 11:00 - 12:00 350 MW

28-12-2025 12:00 - 13:00 350 MW

5. Amount of LTTR remaining after curtailment:

28-12-2025 00:00 - 01:00 306 MW

28-12-2025 01:00 - 02:00 306 MW

28-12-2025 02:00 - 03:00 316 MW

28-12-2025 03:00 - 04:00 316 MW

28-12-2025 05:00 - 06:00 316 MW

28-12-2025 07:00 - 08:00 304 MW

28-12-2025 08:00 - 09:00 304 MW

28-12-2025 09:00 - 10:00 234 MW

28-12-2025 10:00 - 11:00 282 MW

28-12-2025 11:00 - 12:00 201 MW

28-12-2025 12:00 - 13:00 131 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-DE border for delivery period 28-12-2025

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:

28-12-2025 01:00 - 02:00 4019 MW

28-12-2025 02:00 - 03:00 4019 MW

28-12-2025 09:00 - 10:00 4019 MW

28-12-2025 10:00 - 11:00 4019 MW

28-12-2025 11:00 - 12:00 4019 MW

28-12-2025 12:00 - 13:00 4019 MW

5. Amount of LTTR remaining after curtailment:

28-12-2025 01:00 - 02:00 3723 MW

28-12-2025 02:00 - 03:00 3930 MW

28-12-2025 09:00 - 10:00 2837 MW

28-12-2025 10:00 - 11:00 2978 MW

28-12-2025 11:00 - 12:00 1686 MW

28-12-2025 12:00 - 13:00 1718 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 HU-AT border for delivery period 28-12-2025

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:

28-12-2025 09:00 - 10:00 319 MW

28-12-2025 11:00 - 12:00 319 MW

28-12-2025 12:00 - 13:00 319 MW

5. Amount of LTTR remaining after curtailment:

28-12-2025 09:00 - 10:00 228 MW

28-12-2025 11:00 - 12:00 262 MW

28-12-2025 12:00 - 13:00 262 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 28-12-2025

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:

28-12-2025 00:00 - 01:00 185 MW

28-12-2025 01:00 - 02:00 185 MW

28-12-2025 02:00 - 03:00 185 MW

28-12-2025 03:00 - 04:00 185 MW

28-12-2025 04:00 - 05:00 185 MW

28-12-2025 05:00 - 06:00 185 MW

28-12-2025 06:00 - 07:00 185 MW

28-12-2025 07:00 - 08:00 185 MW

28-12-2025 08:00 - 09:00 185 MW

28-12-2025 09:00 - 10:00 185 MW

28-12-2025 10:00 - 11:00 185 MW

28-12-2025 11:00 - 12:00 185 MW

28-12-2025 12:00 - 13:00 185 MW

28-12-2025 13:00 - 14:00 185 MW

28-12-2025 14:00 - 15:00 185 MW

28-12-2025 15:00 - 16:00 185 MW

28-12-2025 16:00 - 17:00 185 MW

28-12-2025 17:00 - 18:00 185 MW

28-12-2025 21:00 - 22:00 185 MW

28-12-2025 22:00 - 23:00 185 MW

28-12-2025 23:00 - 24:00 185 MW

5. Amount of LTTR remaining after curtailment:

28-12-2025 00:00 - 01:00 129 MW

28-12-2025 01:00 - 02:00 129 MW

28-12-2025 02:00 - 03:00 129 MW

28-12-2025 03:00 - 04:00 129 MW

28-12-2025 04:00 - 05:00 129 MW

28-12-2025 05:00 - 06:00 129 MW

28-12-2025 06:00 - 07:00 123 MW

28-12-2025 07:00 - 08:00 110 MW

28-12-2025 08:00 - 09:00 110 MW

28-12-2025 09:00 - 10:00 123 MW

28-12-2025 10:00 - 11:00 123 MW

28-12-2025 11:00 - 12:00 123 MW

28-12-2025 12:00 - 13:00 123 MW

28-12-2025 13:00 - 14:00 123 MW

28-12-2025 14:00 - 15:00 123 MW

28-12-2025 15:00 - 16:00 123 MW

28-12-2025 16:00 - 17:00 123 MW

28-12-2025 17:00 - 18:00 123 MW

28-12-2025 21:00 - 22:00 123 MW

28-12-2025 22:00 - 23:00 123 MW

28-12-2025 23:00 - 24:00 123 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 28-12-2025

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:

28-12-2025 00:00 - 01:00 204 MW

28-12-2025 01:00 - 02:00 204 MW

28-12-2025 02:00 - 03:00 204 MW

28-12-2025 03:00 - 04:00 204 MW

28-12-2025 04:00 - 05:00 204 MW

28-12-2025 05:00 - 06:00 204 MW

28-12-2025 06:00 - 07:00 204 MW

28-12-2025 07:00 - 08:00 204 MW

28-12-2025 08:00 - 09:00 204 MW

28-12-2025 09:00 - 10:00 204 MW

28-12-2025 10:00 - 11:00 204 MW

28-12-2025 11:00 - 12:00 204 MW

28-12-2025 12:00 - 13:00 204 MW

28-12-2025 13:00 - 14:00 204 MW

28-12-2025 14:00 - 15:00 204 MW

28-12-2025 15:00 - 16:00 204 MW

28-12-2025 16:00 - 17:00 204 MW

28-12-2025 17:00 - 18:00 204 MW

28-12-2025 18:00 - 19:00 204 MW

28-12-2025 19:00 - 20:00 204 MW

28-12-2025 20:00 - 21:00 204 MW

28-12-2025 21:00 - 22:00 204 MW

28-12-2025 22:00 - 23:00 204 MW

28-12-2025 23:00 - 24:00 204 MW

5. Amount of LTTR remaining after curtailment:

28-12-2025 00:00 - 01:00 64 MW

28-12-2025 01:00 - 02:00 64 MW

28-12-2025 02:00 - 03:00 64 MW

28-12-2025 03:00 - 04:00 64 MW

28-12-2025 04:00 - 05:00 64 MW

28-12-2025 05:00 - 06:00 64 MW

28-12-2025 06:00 - 07:00 64 MW

28-12-2025 07:00 - 08:00 64 MW

28-12-2025 08:00 - 09:00 64 MW

28-12-2025 09:00 - 10:00 64 MW

28-12-2025 10:00 - 11:00 64 MW

28-12-2025 11:00 - 12:00 64 MW

28-12-2025 12:00 - 13:00 64 MW

28-12-2025 13:00 - 14:00 64 MW

28-12-2025 14:00 - 15:00 64 MW

28-12-2025 15:00 - 16:00 64 MW

28-12-2025 16:00 - 17:00 64 MW

28-12-2025 17:00 - 18:00 64 MW

28-12-2025 18:00 - 19:00 134 MW

28-12-2025 19:00 - 20:00 134 MW

28-12-2025 20:00 - 21:00 134 MW

28-12-2025 21:00 - 22:00 64 MW

28-12-2025 22:00 - 23:00 64 MW

28-12-2025 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

Capacity Curtailment on the SI-IT border for delivery period 27-12-2025

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:

27-12-2025 00:00 - 01:00 185 MW

27-12-2025 01:00 - 02:00 185 MW

27-12-2025 02:00 - 03:00 185 MW

27-12-2025 03:00 - 04:00 185 MW

27-12-2025 04:00 - 05:00 185 MW

27-12-2025 05:00 - 06:00 185 MW

27-12-2025 06:00 - 07:00 185 MW

27-12-2025 07:00 - 08:00 185 MW

27-12-2025 08:00 - 09:00 185 MW

27-12-2025 09:00 - 10:00 185 MW

27-12-2025 10:00 - 11:00 185 MW

27-12-2025 11:00 - 12:00 185 MW

27-12-2025 12:00 - 13:00 185 MW

27-12-2025 13:00 - 14:00 185 MW

27-12-2025 14:00 - 15:00 185 MW

27-12-2025 15:00 - 16:00 185 MW

27-12-2025 16:00 - 17:00 185 MW

27-12-2025 17:00 - 18:00 185 MW

27-12-2025 18:00 - 19:00 185 MW

27-12-2025 19:00 - 20:00 185 MW

27-12-2025 20:00 - 21:00 185 MW

27-12-2025 21:00 - 22:00 185 MW

27-12-2025 22:00 - 23:00 185 MW

27-12-2025 23:00 - 24:00 185 MW

5. Amount of LTTR remaining after curtailment:

27-12-2025 00:00 - 01:00 94 MW

27-12-2025 01:00 - 02:00 109 MW

27-12-2025 02:00 - 03:00 109 MW

27-12-2025 03:00 - 04:00 110 MW

27-12-2025 04:00 - 05:00 116 MW

27-12-2025 05:00 - 06:00 116 MW

27-12-2025 06:00 - 07:00 110 MW

27-12-2025 07:00 - 08:00 123 MW

27-12-2025 08:00 - 09:00 117 MW

27-12-2025 09:00 - 10:00 116 MW

27-12-2025 10:00 - 11:00 115 MW

27-12-2025 11:00 - 12:00 117 MW

27-12-2025 12:00 - 13:00 129 MW

27-12-2025 13:00 - 14:00 125 MW

27-12-2025 14:00 - 15:00 116 MW

27-12-2025 15:00 - 16:00 116 MW

27-12-2025 16:00 - 17:00 116 MW

27-12-2025 17:00 - 18:00 125 MW

27-12-2025 18:00 - 19:00 115 MW

27-12-2025 19:00 - 20:00 108 MW

27-12-2025 20:00 - 21:00 108 MW

27-12-2025 21:00 - 22:00 116 MW

27-12-2025 22:00 - 23:00 116 MW

27-12-2025 23:00 - 24:00 109 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.

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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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