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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
  • 470+
    Registered Market Participants
  • 20k+
    Auctions per year
  • 100 %
    Auction Tool Availability
  • 95
    Employees
  • 50
    TSOs serviced

Latest market messages

Capacity Curtailment on the EE-LV border for delivery period 16-06-2025

by JAO

1. TSO(s)*:

ELERING

2. Identification of affected Long Term Transmission Rights:

EE-LV

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

16-06-2025 00:00 - 01:00 500 MW

16-06-2025 01:00 - 02:00 500 MW

16-06-2025 02:00 - 03:00 500 MW

16-06-2025 03:00 - 04:00 500 MW

16-06-2025 04:00 - 05:00 500 MW

16-06-2025 05:00 - 06:00 500 MW

16-06-2025 06:00 - 07:00 500 MW

16-06-2025 07:00 - 08:00 500 MW

16-06-2025 08:00 - 09:00 500 MW

16-06-2025 09:00 - 10:00 500 MW

16-06-2025 10:00 - 11:00 500 MW

16-06-2025 11:00 - 12:00 500 MW

16-06-2025 12:00 - 13:00 500 MW

16-06-2025 13:00 - 14:00 500 MW

16-06-2025 14:00 - 15:00 500 MW

16-06-2025 15:00 - 16:00 500 MW

16-06-2025 16:00 - 17:00 500 MW

16-06-2025 17:00 - 18:00 500 MW

16-06-2025 18:00 - 19:00 500 MW

16-06-2025 19:00 - 20:00 500 MW

16-06-2025 20:00 - 21:00 500 MW

16-06-2025 21:00 - 22:00 500 MW

16-06-2025 22:00 - 23:00 500 MW

16-06-2025 23:00 - 24:00 500 MW

5. Amount of LTTR remaining after curtailment:

16-06-2025 00:00 - 01:00 454 MW

16-06-2025 01:00 - 02:00 449 MW

16-06-2025 02:00 - 03:00 454 MW

16-06-2025 03:00 - 04:00 449 MW

16-06-2025 04:00 - 05:00 454 MW

16-06-2025 05:00 - 06:00 451 MW

16-06-2025 06:00 - 07:00 454 MW

16-06-2025 07:00 - 08:00 457 MW

16-06-2025 08:00 - 09:00 460 MW

16-06-2025 09:00 - 10:00 465 MW

16-06-2025 10:00 - 11:00 465 MW

16-06-2025 11:00 - 12:00 465 MW

16-06-2025 12:00 - 13:00 465 MW

16-06-2025 13:00 - 14:00 465 MW

16-06-2025 14:00 - 15:00 465 MW

16-06-2025 15:00 - 16:00 465 MW

16-06-2025 16:00 - 17:00 465 MW

16-06-2025 17:00 - 18:00 460 MW

16-06-2025 18:00 - 19:00 459 MW

16-06-2025 19:00 - 20:00 458 MW

16-06-2025 20:00 - 21:00 458 MW

16-06-2025 21:00 - 22:00 455 MW

16-06-2025 22:00 - 23:00 451 MW

16-06-2025 23:00 - 24:00 451 MW

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

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

*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 16-06-2025

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:

16-06-2025 11:00 - 12:00 249 MW

16-06-2025 12:00 - 13:00 249 MW

16-06-2025 13:00 - 14:00 249 MW

16-06-2025 14:00 - 15:00 249 MW

16-06-2025 15:00 - 16:00 249 MW

5. Amount of LTTR remaining after curtailment:

16-06-2025 11:00 - 12:00 204 MW

16-06-2025 12:00 - 13:00 218 MW

16-06-2025 13:00 - 14:00 210 MW

16-06-2025 14:00 - 15:00 198 MW

16-06-2025 15:00 - 16:00 220 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 16-06-2025

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:

16-06-2025 09:00 - 10:00 294 MW

16-06-2025 10:00 - 11:00 294 MW

16-06-2025 11:00 - 12:00 294 MW

16-06-2025 12:00 - 13:00 294 MW

16-06-2025 13:00 - 14:00 294 MW

16-06-2025 14:00 - 15:00 294 MW

16-06-2025 15:00 - 16:00 294 MW

5. Amount of LTTR remaining after curtailment:

16-06-2025 09:00 - 10:00 260 MW

16-06-2025 10:00 - 11:00 244 MW

16-06-2025 11:00 - 12:00 197 MW

16-06-2025 12:00 - 13:00 228 MW

16-06-2025 13:00 - 14:00 228 MW

16-06-2025 14:00 - 15:00 229 MW

16-06-2025 15:00 - 16:00 260 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 16-06-2025

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:

16-06-2025 09:00 - 10:00 350 MW

16-06-2025 10:00 - 11:00 350 MW

16-06-2025 11:00 - 12:00 350 MW

16-06-2025 12:00 - 13:00 350 MW

16-06-2025 13:00 - 14:00 350 MW

16-06-2025 14:00 - 15:00 350 MW

16-06-2025 15:00 - 16:00 350 MW

5. Amount of LTTR remaining after curtailment:

16-06-2025 09:00 - 10:00 32 MW

16-06-2025 10:00 - 11:00 30 MW

16-06-2025 11:00 - 12:00 113 MW

16-06-2025 12:00 - 13:00 150 MW

16-06-2025 13:00 - 14:00 169 MW

16-06-2025 14:00 - 15:00 166 MW

16-06-2025 15:00 - 16:00 166 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 16-06-2025

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 :
• 06/16/2025
      • 09:00 - 09:15 463MW
      • 09:15 - 09:30 463MW
      • 09:30 - 09:45 463MW
      • 09:45 - 10:00 463MW
      • 10:00 - 10:15 416MW
      • 10:15 - 10:30 416MW
      • 10:30 - 10:45 416MW
      • 10:45 - 11:00 416MW
      • 11:00 - 11:15 1251MW
      • 11:15 - 11:30 1251MW
      • 11:30 - 11:45 1251MW
      • 11:45 - 12:00 1251MW
      • 12:00 - 12:15 1171MW
      • 12:15 - 12:30 1171MW
      • 12:30 - 12:45 1171MW
      • 12:45 - 13:00 1171MW
      • 13:00 - 13:15 1312MW
      • 13:15 - 13:30 1312MW
      • 13:30 - 13:45 1312MW
      • 13:45 - 14:00 1312MW
      • 14:00 - 14:15 1593MW
      • 14:15 - 14:30 1593MW
      • 14:30 - 14:45 1593MW
      • 14:45 - 15:00 1593MW
      • 15:00 - 15:15 1592MW
      • 15:15 - 15:30 1592MW
      • 15:30 - 15:45 1592MW
      • 15:45 - 16:00 1592MW

5. Amount of LTTR remaining after curtailment:


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-IT border for delivery period 16-06-2025

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 :
• 06/16/2025
      • 09:00 - 09:15 277MW
      • 09:15 - 09:30 277MW
      • 09:30 - 09:45 277MW
      • 09:45 - 10:00 277MW
      • 10:00 - 10:15 262MW
      • 10:15 - 10:30 262MW
      • 10:30 - 10:45 262MW
      • 10:45 - 11:00 262MW
      • 11:00 - 11:15 210MW
      • 11:15 - 11:30 210MW
      • 11:30 - 11:45 210MW
      • 11:45 - 12:00 210MW
      • 12:00 - 12:15 236MW
      • 12:15 - 12:30 236MW
      • 12:30 - 12:45 236MW
      • 12:45 - 13:00 236MW
      • 13:00 - 13:15 238MW
      • 13:15 - 13:30 238MW
      • 13:30 - 13:45 238MW
      • 13:45 - 14:00 238MW
      • 14:00 - 14:15 243MW
      • 14:15 - 14:30 243MW
      • 14:30 - 14:45 243MW
      • 14:45 - 15:00 243MW
      • 15:00 - 15:15 278MW
      • 15:15 - 15:30 278MW
      • 15:30 - 15:45 278MW
      • 15:45 - 16:00 278MW

5. Amount of LTTR remaining after curtailment:


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.

2025 Auction Calendar update

by JAO

Dear Market Participants,

We would like to inform you that as per TSOs request, the 2025 Auction Calendar has been updated on the corridor IF2-FR-GB and IF2-GB-FR.

For more details please refer to the Auction Calendar on our webpage http://www.jao.eu/auctions#/calendar/table to find its latest version.

Best regards,

JAO Operations Team

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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