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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 BG-GR border for delivery period 20-09-2025

by JAO

1. TSO(s)*:

HTSO-TSO

2. Identification of affected Long Term Transmission Rights:

BG-GR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

20-09-2025 09:00 - 10:00 800 MW

20-09-2025 10:00 - 11:00 800 MW

20-09-2025 11:00 - 12:00 800 MW

20-09-2025 12:00 - 13:00 800 MW

20-09-2025 13:00 - 14:00 800 MW

20-09-2025 14:00 - 15:00 800 MW

20-09-2025 15:00 - 16:00 800 MW

5. Amount of LTTR remaining after curtailment:

20-09-2025 09:00 - 10:00 482 MW

20-09-2025 10:00 - 11:00 389 MW

20-09-2025 11:00 - 12:00 389 MW

20-09-2025 12:00 - 13:00 389 MW

20-09-2025 13:00 - 14:00 389 MW

20-09-2025 14:00 - 15:00 389 MW

20-09-2025 15:00 - 16:00 482 MW

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

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

JAO_01: SDAC market coupling 18/09 - Session complete

by JAO

Please be informed that the day-ahead market coupling session is now completed.

Thank you for your patience.

Kind regards,

JAO Operations

UMM_01a: Delay in final Market Coupling Results publication

by JAO

Dear all,

The Market Coupling process is delayed due to technical reasons or market issues.

Therefore, the publication of the final Market Coupling Results is delayed.

Therefore, if relevant, we advise you to update your shadow bids at JAO eCAT platform before 14:10. Please refer to the website of JAO to get the results of the Shadow Auctions.

Thank your understanding.

Kind regards,

JAO Operations

[ExC_02]: Delay in Market Coupling Results publication

by JAO

Please be aware that the publication of the Market Coupling Results is delayed until further notice. 

The Market Coupling Results will be published as soon as they are available.  

If needed, another delay message will be sent out, therefore, if relevant, we advise you to update your shadow bids at JAO eCAT platform before 14:10.

Thank your understanding.

Kind regards,

JAO Operations

Capacity Curtailment on the EE-LV border for delivery period 19-09-2025

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:

19-09-2025 00:00 - 01:00 500 MW

19-09-2025 01:00 - 02:00 500 MW

19-09-2025 02:00 - 03:00 500 MW

19-09-2025 03:00 - 04:00 500 MW

19-09-2025 04:00 - 05:00 500 MW

19-09-2025 05:00 - 06:00 500 MW

19-09-2025 06:00 - 07:00 500 MW

19-09-2025 07:00 - 08:00 500 MW

19-09-2025 09:00 - 10:00 500 MW

19-09-2025 10:00 - 11:00 500 MW

19-09-2025 11:00 - 12:00 500 MW

19-09-2025 12:00 - 13:00 500 MW

19-09-2025 13:00 - 14:00 500 MW

19-09-2025 14:00 - 15:00 500 MW

19-09-2025 15:00 - 16:00 500 MW

19-09-2025 16:00 - 17:00 500 MW

19-09-2025 17:00 - 18:00 500 MW

19-09-2025 18:00 - 19:00 500 MW

19-09-2025 19:00 - 20:00 500 MW

19-09-2025 20:00 - 21:00 500 MW

19-09-2025 21:00 - 22:00 500 MW

19-09-2025 22:00 - 23:00 500 MW

19-09-2025 23:00 - 24:00 500 MW

5. Amount of LTTR remaining after curtailment:

19-09-2025 00:00 - 01:00 451 MW

19-09-2025 01:00 - 02:00 451 MW

19-09-2025 02:00 - 03:00 451 MW

19-09-2025 03:00 - 04:00 451 MW

19-09-2025 04:00 - 05:00 453 MW

19-09-2025 05:00 - 06:00 453 MW

19-09-2025 06:00 - 07:00 453 MW

19-09-2025 07:00 - 08:00 465 MW

19-09-2025 09:00 - 10:00 465 MW

19-09-2025 10:00 - 11:00 465 MW

19-09-2025 11:00 - 12:00 441 MW

19-09-2025 12:00 - 13:00 442 MW

19-09-2025 13:00 - 14:00 441 MW

19-09-2025 14:00 - 15:00 441 MW

19-09-2025 15:00 - 16:00 465 MW

19-09-2025 16:00 - 17:00 465 MW

19-09-2025 17:00 - 18:00 465 MW

19-09-2025 18:00 - 19:00 465 MW

19-09-2025 19:00 - 20:00 455 MW

19-09-2025 20:00 - 21:00 458 MW

19-09-2025 21:00 - 22:00 458 MW

19-09-2025 22:00 - 23:00 453 MW

19-09-2025 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*:
Please see the latest day-ahead net transfer capacity values published on the Nord Pool UMM Platform under "Unavailability of electricity facilities: Transmission EE → LV" at

https://umm.nordpoolgroup.com/#/messages?publicationDate=all&eventDate=custom&connections=EE-LV&eventDateStart=1970-01-01&eventDateStop=2125-04-20 , as well as the capacity already allocated on the Baltic Balancing Market for balancing capacity sharing at https://baltic.transparency-dashboard.eu/node/108

7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s)*?
There is no alternative to the curtailment of the affected LTTRs.

*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 GR-IT border for delivery period 19-09-2025

by JAO

1. TSO(s)*:

TERNA, ADMIE

2. Identification of affected Long Term Transmission Rights:

GR-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

19-09-2025 00:00 - 01:00 500 MW

19-09-2025 01:00 - 02:00 500 MW

19-09-2025 02:00 - 03:00 500 MW

19-09-2025 03:00 - 04:00 500 MW

19-09-2025 04:00 - 05:00 500 MW

19-09-2025 05:00 - 06:00 500 MW

19-09-2025 06:00 - 07:00 500 MW

19-09-2025 07:00 - 08:00 500 MW

19-09-2025 08:00 - 09:00 500 MW

19-09-2025 09:00 - 10:00 500 MW

19-09-2025 10:00 - 11:00 500 MW

19-09-2025 11:00 - 12:00 500 MW

19-09-2025 12:00 - 13:00 500 MW

19-09-2025 13:00 - 14:00 500 MW

19-09-2025 14:00 - 15:00 500 MW

19-09-2025 15:00 - 16:00 500 MW

19-09-2025 16:00 - 17:00 500 MW

19-09-2025 17:00 - 18:00 500 MW

19-09-2025 18:00 - 19:00 500 MW

19-09-2025 19:00 - 20:00 500 MW

19-09-2025 20:00 - 21:00 500 MW

19-09-2025 21:00 - 22:00 500 MW

19-09-2025 22:00 - 23:00 500 MW

19-09-2025 23:00 - 24:00 500 MW

5. Amount of LTTR remaining after curtailment:

19-09-2025 00:00 - 01:00 0 MW

19-09-2025 01:00 - 02:00 0 MW

19-09-2025 02:00 - 03:00 0 MW

19-09-2025 03:00 - 04:00 0 MW

19-09-2025 04:00 - 05:00 0 MW

19-09-2025 05:00 - 06:00 0 MW

19-09-2025 06:00 - 07:00 0 MW

19-09-2025 07:00 - 08:00 0 MW

19-09-2025 08:00 - 09:00 0 MW

19-09-2025 09:00 - 10:00 0 MW

19-09-2025 10:00 - 11:00 0 MW

19-09-2025 11:00 - 12:00 0 MW

19-09-2025 12:00 - 13:00 0 MW

19-09-2025 13:00 - 14:00 0 MW

19-09-2025 14:00 - 15:00 0 MW

19-09-2025 15:00 - 16:00 0 MW

19-09-2025 16:00 - 17:00 0 MW

19-09-2025 17:00 - 18:00 0 MW

19-09-2025 18:00 - 19:00 0 MW

19-09-2025 19:00 - 20:00 0 MW

19-09-2025 20:00 - 21:00 0 MW

19-09-2025 21:00 - 22:00 0 MW

19-09-2025 22:00 - 23:00 0 MW

19-09-2025 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*:

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 IT-FR border for delivery period 19-09-2025

by JAO

1. TSO(s)*:

TERNA, RTE

2. Identification of affected Long Term Transmission Rights:

IT-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

19-09-2025 00:00 - 01:00 1368 MW

19-09-2025 01:00 - 02:00 1368 MW

19-09-2025 02:00 - 03:00 1368 MW

19-09-2025 03:00 - 04:00 1368 MW

19-09-2025 04:00 - 05:00 1368 MW

19-09-2025 05:00 - 06:00 1368 MW

19-09-2025 06:00 - 07:00 1368 MW

19-09-2025 07:00 - 08:00 1368 MW

19-09-2025 08:00 - 09:00 1368 MW

19-09-2025 09:00 - 10:00 1368 MW

19-09-2025 10:00 - 11:00 1368 MW

19-09-2025 11:00 - 12:00 1368 MW

19-09-2025 12:00 - 13:00 1368 MW

19-09-2025 13:00 - 14:00 1368 MW

19-09-2025 14:00 - 15:00 1368 MW

19-09-2025 15:00 - 16:00 1368 MW

19-09-2025 16:00 - 17:00 1368 MW

19-09-2025 17:00 - 18:00 1368 MW

19-09-2025 18:00 - 19:00 1368 MW

19-09-2025 19:00 - 20:00 1368 MW

19-09-2025 20:00 - 21:00 1368 MW

19-09-2025 21:00 - 22:00 1368 MW

19-09-2025 22:00 - 23:00 1368 MW

19-09-2025 23:00 - 24:00 1368 MW

5. Amount of LTTR remaining after curtailment:

19-09-2025 00:00 - 01:00 1034 MW

19-09-2025 01:00 - 02:00 1034 MW

19-09-2025 02:00 - 03:00 1034 MW

19-09-2025 03:00 - 04:00 1034 MW

19-09-2025 04:00 - 05:00 1034 MW

19-09-2025 05:00 - 06:00 1034 MW

19-09-2025 06:00 - 07:00 1034 MW

19-09-2025 07:00 - 08:00 851 MW

19-09-2025 08:00 - 09:00 851 MW

19-09-2025 09:00 - 10:00 851 MW

19-09-2025 10:00 - 11:00 851 MW

19-09-2025 11:00 - 12:00 851 MW

19-09-2025 12:00 - 13:00 851 MW

19-09-2025 13:00 - 14:00 851 MW

19-09-2025 14:00 - 15:00 851 MW

19-09-2025 15:00 - 16:00 851 MW

19-09-2025 16:00 - 17:00 851 MW

19-09-2025 17:00 - 18:00 851 MW

19-09-2025 18:00 - 19:00 851 MW

19-09-2025 19:00 - 20:00 851 MW

19-09-2025 20:00 - 21:00 851 MW

19-09-2025 21:00 - 22:00 851 MW

19-09-2025 22:00 - 23:00 851 MW

19-09-2025 23:00 - 24:00 1034 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. 

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

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