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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-IT border for delivery period 25-02-2026

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:

25-02-2026 15:00 - 16:00 311 MW

5. Amount of LTTR remaining after curtailment:

25-02-2026 15:00 - 16:00 279 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

Capacity Curtailment on the ES-FR border for delivery period 25-02-2026

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:

25-02-2026 06:00 - 07:00 676 MW

25-02-2026 07:00 - 08:00 676 MW

25-02-2026 08:00 - 09:00 676 MW

25-02-2026 09:00 - 10:00 676 MW

25-02-2026 10:00 - 11:00 676 MW

25-02-2026 11:00 - 12:00 676 MW

25-02-2026 12:00 - 13:00 676 MW

25-02-2026 13:00 - 14:00 676 MW

25-02-2026 14:00 - 15:00 676 MW

25-02-2026 15:00 - 16:00 676 MW

5. Amount of LTTR remaining after curtailment:

25-02-2026 06:00 - 07:00 577 MW

25-02-2026 07:00 - 08:00 577 MW

25-02-2026 08:00 - 09:00 577 MW

25-02-2026 09:00 - 10:00 577 MW

25-02-2026 10:00 - 11:00 279 MW

25-02-2026 11:00 - 12:00 279 MW

25-02-2026 12:00 - 13:00 279 MW

25-02-2026 13:00 - 14:00 279 MW

25-02-2026 14:00 - 15:00 279 MW

25-02-2026 15:00 - 16:00 279 MW

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

06:00-07:00 Network Security 07:00-08:00 Network Security 08:00-09:00 Network Security 09:00-10:00 Network Security 10:00-11:00 GAUDIERE-TAMAREAU 2 11:00-12:00 GAUDIERE-TAMAREAU 2 12:00-13:00 GAUDIERE-TAMAREAU 2 13:00-14:00 GAUDIERE-TAMAREAU 2 14:00-15:00 GAUDIERE-TAMAREAU 2 15:00-16:00 GAUDIERE-TAMAREAU 2

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

Credit limit check disabled

by JAO

Kindly note that due to unforeseen events, the Credit Limit check had to be disabled for the below Auctions:

NLL-BE-GB-I-ID0612-260224-01

NLL-GB-BE-I-ID0612-260224-01

EL1-FR-GB-I-ID0818-260224-01

EL1-GB-FR-I-ID0818-260224-01

VKL-GB-D1-I-ID0816-260224-01

VKL-D1-GB-I-ID0816-260224-01

IF1-GB-FR-I-ID0816-260224-01

IF1-FR-GB-I-ID0816-260224-01



Thank you for your understanding.

SOLVED - Domain JAO.EU is available

by JAO

Please be informed that all issues related to the jao.eu domain have now been successfully resolved. Kindly use the usual link https://ecat.jao.eu/ca/web/pages/login.jsp. 

All associated applications and platforms are fully accessible (API, Publication tool).

Should you experience any further difficulties, please do not hesitate to contact us.

Update: New temporarily domain for Puto

by JAO

Please be informed to use the temporarily link below to access Publication tool.

https://publicationtool.jao-sa.com/

Thank you for your understanding.

Update: New temporarily domain for Ecat

by JAO

Please be informed to use the following link (only) to access auction platform https://ecat.jao-sa.com/login. The ‘Auction tool’ button on the website is not functional.

We kindly request you to download the Allocation Results and Right documents directly from eCAT, here https://ecat.jao-sa.com/login.

Should you experience any further difficulties, please do not hesitate to contact us.

Update: JAO domain is now temporarily available

by JAO

Please be informed that all issues related to the jao.eu domain have now been temporarily resolved. All associated applications and platforms are fully accessible.

Please use the following link to access auction platform https://ecat.jao-sa.com/login. Only through this URL you will be able to access the auction platform.

Should you experience any further difficulties, please do not hesitate to contact us.

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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