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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 IT-ME border for delivery period 03-07-2026

by JAO

1. TSO(s)*:

CGES

2. Identification of affected Long Term Transmission Rights:

IT-ME

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

03-07-2026 06:00 - 07:00 400 MW

03-07-2026 07:00 - 08:00 400 MW

03-07-2026 08:00 - 09:00 400 MW

03-07-2026 09:00 - 10:00 400 MW

03-07-2026 10:00 - 11:00 400 MW

03-07-2026 11:00 - 12:00 400 MW

03-07-2026 12:00 - 13:00 400 MW

03-07-2026 13:00 - 14:00 400 MW

03-07-2026 14:00 - 15:00 400 MW

5. Amount of LTTR remaining after curtailment:

03-07-2026 06:00 - 07:00 0 MW

03-07-2026 07:00 - 08:00 0 MW

03-07-2026 08:00 - 09:00 0 MW

03-07-2026 09:00 - 10:00 0 MW

03-07-2026 10:00 - 11:00 0 MW

03-07-2026 11:00 - 12:00 0 MW

03-07-2026 12:00 - 13:00 0 MW

03-07-2026 13:00 - 14:00 0 MW

03-07-2026 14:00 - 15:00 0 MW

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

HVDC Monita

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

Capacity Curtailment on the ES-FR border for delivery period 02-07-2026

by JAO

1. TSO(s)*:

RTE-TSO

2. Identification of affected Long Term Transmission Rights:

ES-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

02-07-2026 11:00 - 12:00 1280 MW

02-07-2026 12:00 - 13:00 1280 MW

02-07-2026 13:00 - 14:00 1280 MW

02-07-2026 14:00 - 15:00 1280 MW

02-07-2026 15:00 - 16:00 1280 MW

02-07-2026 16:00 - 17:00 1280 MW

02-07-2026 17:00 - 18:00 1280 MW

5. Amount of LTTR remaining after curtailment:

02-07-2026 11:00 - 12:00 963 MW

02-07-2026 12:00 - 13:00 963 MW

02-07-2026 13:00 - 14:00 963 MW

02-07-2026 14:00 - 15:00 963 MW

02-07-2026 15:00 - 16:00 712 MW

02-07-2026 16:00 - 17:00 712 MW

02-07-2026 17:00 - 18:00 712 MW

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

   02/07/2026

      11:00-12:00 Network Security

      12:00-13:00 Network Security

      13:00-14:00 Network Security

      14:00-15:00 Network Security

      15:00-16:00 Network Security

      16:00-17:00 Network Security

      17:00-18:00 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

Capacity Curtailment on the FR-ES border for delivery period 02-07-2026

by JAO

1. TSO(s)*:

RTE-TSO

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:

02-07-2026 04:00 - 05:00 1599 MW

02-07-2026 05:00 - 06:00 1599 MW

5. Amount of LTTR remaining after curtailment:

02-07-2026 04:00 - 05:00 1316 MW

02-07-2026 05:00 - 06:00 1316 MW

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

   02/07/2026

      04:00-05:00 Network Security

      05:00-06:00 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

Scheduled Maintenance – Publication Tool 1.3.0 Deployment

by JAO

Please be informed that we will deploy a new version 1.3.0. of our Publication Tool today at 5:00 PM.

During the deployment, you may experience a brief service interruption of up to 30 seconds.

Thank you for your understanding.

Jao operations.

SDAC_JAO_01: SDAC market coupling 30/06 - Session complete

by JAO

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

[SDAC_ExC_02a]: Delay in Market Coupling Results Publication

by JAO

Dear Market Participants,

Please be aware that the publication of the preliminary SDAC 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.

Further information can be found in the Fallback Manual that is published on the websites of NEMO Committee and ENTSO-E.

Therefore, if relevant, we advise you to update your shadow bids at JAO eCAT platform before 14:10 CET/CEST.

Best regards,

Operations Team

Update: Credit limit check disabled for all auctions until further notice

by JAO

Please be informed that the previously reported issue has now been resolved. Credit limit checks have been fully reinstated for both Daily and Intraday Auctions.

We appreciate your understanding.

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.

Do you need support?

If you can't find an answer to your question, our team is here to help!