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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

Temporary Unavailability of Auction Data - RESOLVED

by JAO

Please be informed the Auction data page on JAO website is available now.

Temporary Unavailability of Auction Data

by JAO

Please be informed that auction data on our website is currently temporarily unavailable due to technical reasons.

We are working to restore the service as soon as possible and will keep you informed of any developments.
Further information will be shared as soon as it becomes available.

We apologize for any inconvenience this may cause and thank you for your understanding.

Availability of Rights Documents and Allocation Results

by JAO

Please be informed that the Rights documents and allocation results are temporally not distributed automatically by our system.

We kindly ask that you download these files directly from the Trader UI.

Should you require any assistance accessing the documents, please do not hesitate to contact us.

eCAT Downtime on 09/09/2026

by JAO

Please note that an intervention is scheduled for 09/09/2026, starting at 20:00 (CET).

During this time, eCAT access will be unavailable between 20:00 to 21:00 (CET).

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

Kind regards,

Operations Team

Capacity Curtailment on the FR-ES border for delivery period 09-09-2026

by JAO

1. TSO(s)*:

RTE, REE

2. Identification of affected Long Term Transmission Rights:

FR-ES

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

09-09-2026 18:00 - 19:00 2149 MW

09-09-2026 19:00 - 20:00 2149 MW

09-09-2026 20:00 - 21:00 2149 MW

09-09-2026 21:00 - 22:00 2149 MW

09-09-2026 22:00 - 23:00 2149 MW

09-09-2026 23:00 - 24:00 2149 MW

5. Amount of LTTR remaining after curtailment:

09-09-2026 18:00 - 19:00 1961 MW

09-09-2026 19:00 - 20:00 1961 MW

09-09-2026 20:00 - 21:00 1961 MW

09-09-2026 21:00 - 22:00 1961 MW

09-09-2026 22:00 - 23:00 1961 MW

09-09-2026 23:00 - 24:00 1961 MW

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

09/09/2026

      18:00-19:00 Network Security

      19:00-20:00 Network Security

      20:00-21:00 Network Security

      21:00-22:00 Network Security

      22:00-23:00 Network Security

      23:00-24:00 Network Security

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

   The available remedial actions were assessed as insufficient or ineffective to avoid the violation of operational security limits

*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 IF1-GB-FR border for delivery period 21-09-2026

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:

IF1-GB-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

21-09-2026 00:00 - 01:00 900 MW

21-09-2026 01:00 - 02:00 900 MW

21-09-2026 02:00 - 03:00 900 MW

21-09-2026 03:00 - 04:00 900 MW

21-09-2026 04:00 - 05:00 900 MW

21-09-2026 05:00 - 06:00 900 MW

21-09-2026 06:00 - 07:00 900 MW

21-09-2026 07:00 - 08:00 900 MW

21-09-2026 08:00 - 09:00 900 MW

21-09-2026 09:00 - 10:00 900 MW

21-09-2026 10:00 - 11:00 900 MW

21-09-2026 11:00 - 12:00 900 MW

21-09-2026 12:00 - 13:00 900 MW

21-09-2026 13:00 - 14:00 900 MW

21-09-2026 14:00 - 15:00 900 MW

21-09-2026 15:00 - 16:00 900 MW

21-09-2026 16:00 - 17:00 900 MW

21-09-2026 17:00 - 18:00 900 MW

21-09-2026 18:00 - 19:00 900 MW

21-09-2026 19:00 - 20:00 900 MW

21-09-2026 20:00 - 21:00 900 MW

21-09-2026 21:00 - 22:00 900 MW

21-09-2026 22:00 - 23:00 900 MW

21-09-2026 23:00 - 24:00 900 MW

5. Amount of LTTR remaining after curtailment:

21-09-2026 00:00 - 01:00 0 MW

21-09-2026 01:00 - 02:00 0 MW

21-09-2026 02:00 - 03:00 0 MW

21-09-2026 03:00 - 04:00 0 MW

21-09-2026 04:00 - 05:00 0 MW

21-09-2026 05:00 - 06:00 0 MW

21-09-2026 06:00 - 07:00 0 MW

21-09-2026 07:00 - 08:00 0 MW

21-09-2026 08:00 - 09:00 0 MW

21-09-2026 09:00 - 10:00 0 MW

21-09-2026 10:00 - 11:00 0 MW

21-09-2026 11:00 - 12:00 0 MW

21-09-2026 12:00 - 13:00 0 MW

21-09-2026 13:00 - 14:00 0 MW

21-09-2026 14:00 - 15:00 0 MW

21-09-2026 15:00 - 16:00 0 MW

21-09-2026 16:00 - 17:00 0 MW

21-09-2026 17:00 - 18:00 0 MW

21-09-2026 18:00 - 19:00 0 MW

21-09-2026 19:00 - 20:00 0 MW

21-09-2026 20:00 - 21:00 0 MW

21-09-2026 21:00 - 22:00 0 MW

21-09-2026 22:00 - 23:00 0 MW

21-09-2026 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 unplanned maintenance

eCAT Downtime on 07/09/2026

by JAO

Please note that an intervention is scheduled for 07/09/2026, starting at 22:00.

During this time, eCAT access will be unavailable between 22:30 and 01:00

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

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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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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