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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.

 

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

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Daily and Intraday Auction Results

by JAO

Dear Market Participants,

Due to the ongoing technical issue with the Auction Results Publication, please find the results attached to this message.

Thank you for your understanding.

Kind regards,

JAO Operations

Attachments

Capacity Curtailment on the EE-LV border for delivery period 07-11-2025

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:

07-11-2025 00:00 - 01:00 550 MW

07-11-2025 01:00 - 02:00 550 MW

07-11-2025 02:00 - 03:00 550 MW

07-11-2025 05:00 - 06:00 550 MW

07-11-2025 06:00 - 07:00 550 MW

07-11-2025 09:00 - 10:00 550 MW

07-11-2025 10:00 - 11:00 550 MW

07-11-2025 11:00 - 12:00 550 MW

07-11-2025 12:00 - 13:00 550 MW

07-11-2025 13:00 - 14:00 550 MW

07-11-2025 14:00 - 15:00 550 MW

07-11-2025 15:00 - 16:00 550 MW

07-11-2025 16:00 - 17:00 550 MW

07-11-2025 17:00 - 18:00 550 MW

07-11-2025 18:00 - 19:00 550 MW

07-11-2025 19:00 - 20:00 550 MW

07-11-2025 20:00 - 21:00 550 MW

07-11-2025 21:00 - 22:00 550 MW

5. Amount of LTTR remaining after curtailment:

07-11-2025 00:00 - 01:00 511 MW

07-11-2025 01:00 - 02:00 509 MW

07-11-2025 02:00 - 03:00 509 MW

07-11-2025 05:00 - 06:00 511 MW

07-11-2025 06:00 - 07:00 501 MW

07-11-2025 09:00 - 10:00 509 MW

07-11-2025 10:00 - 11:00 509 MW

07-11-2025 11:00 - 12:00 504 MW

07-11-2025 12:00 - 13:00 505 MW

07-11-2025 13:00 - 14:00 504 MW

07-11-2025 14:00 - 15:00 504 MW

07-11-2025 15:00 - 16:00 501 MW

07-11-2025 16:00 - 17:00 501 MW

07-11-2025 17:00 - 18:00 501 MW

07-11-2025 18:00 - 19:00 501 MW

07-11-2025 19:00 - 20:00 506 MW

07-11-2025 20:00 - 21:00 506 MW

07-11-2025 21:00 - 22:00 506 MW

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

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

Daily and Intraday Auction Results Delay

by JAO

Dear Market Participants,

Due to the ongoing technical issue with the Auction Results Publication will be delayed

Thank you for your understanding.

Kind regards,
JAO Operations

Offered Capacity Not Published

by JAO

Dear Market Participants,

We are currently experiencing a technical issue affecting the publication of the Offered Capacities for the ongoing auctions.

For your reference, please check the values on the Trader UI.

Thank you for your understanding.

Kind regards,

JAO Operations

Final Reminder: SDAC Market Coupling Members’ Testing 19 November 2025 - Registration Open

by JAO

Dear Market Participants,

We are pleased to announce that the members’ testing for SDAC Market Coupling will take place on 19 November 2025. This testing phase will focus on ensuring that all systems are fully optimized and ready for seamless implementation. It provides an opportunity to fine-tune processes, validate key scenarios, and ensure everything is in place for a smooth launch.

During the testing, TSO cross-border nomination processes and JAO shadow auctions will be active and available only during the day of execution, with the following scenario:

  • 19/11 – Full decoupling with shadow auction ( including Nominations)

To register, please reply to this email with the following details:

  • Company Name
  • EIC Code
  • Full Name of Participant(s)
  • Email Address of Participant(s)
  • eCAT Username (if already registered)

Please note:

Registration is limited to members already participating in the shadow auction allocation in the production environment.

Interconnector entitlements will be copied from the production environment to facilitate nomination of shadow auction capacity towards the TSOs.

Deadline for registration: 10/11/2025.

Please find the information package attached.

Should you have any questions, do not hesitate to reach out to us at helpdesk@jao.eu

Kind Regards

Operations Team

Attachments

Capacity Curtailment on the DE-AT border for delivery period 07/11/2025

by JAO

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

DE-AT

3, Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

4. Affected volume in MW / period:

07-11-2025 00:00 - 01:00 4820 MW

07-11-2025 01:00 - 02:00 4820 MW

07-11-2025 02:00 - 03:00 4820 MW

07-11-2025 03:00 - 04:00 4820 MW

07-11-2025 04:00 - 05:00 4820 MW

07-11-2025 05:00 - 06:00 4820 MW

07-11-2025 06:00 - 07:00 4820 MW

07-11-2025 07:00 - 08:00 4820 MW

07-11-2025 08:00 - 09:00 4820 MW

07-11-2025 09:00 - 10:00 4820 MW

07-11-2025 10:00 - 11:00 4820 MW

07-11-2025 11:00 - 12:00 4820 MW

07-11-2025 12:00 - 13:00 4820 MW

07-11-2025 13:00 - 14:00 4820 MW

07-11-2025 14:00 - 15:00 4820 MW

07-11-2025 15:00 - 16:00 4820 MW

07-11-2025 16:00 - 17:00 4820 MW

07-11-2025 17:00 - 18:00 4820 MW

07-11-2025 18:00 - 19:00 4820 MW

07-11-2025 19:00 - 20:00 4820 MW

07-11-2025 20:00 - 21:00 4820 MW

07-11-2025 21:00 - 22:00 4820 MW

07-11-2025 22:00 - 23:00 4820 MW

07-11-2025 23:00 - 00:00 4820 MW

5. Amount of LTTR remaining after curtailment:

07-11-2025 00:00 - 01:00 4513 MW

07-11-2025 01:00 - 02:00 4513 MW

07-11-2025 02:00 - 03:00 4513 MW

07-11-2025 03:00 - 04:00 4513 MW

07-11-2025 04:00 - 05:00 4513 MW

07-11-2025 05:00 - 06:00 4513 MW

07-11-2025 06:00 - 07:00 4513 MW

07-11-2025 07:00 - 08:00 4513 MW

07-11-2025 08:00 - 09:00 4513 MW

07-11-2025 09:00 - 10:00 4513 MW

07-11-2025 10:00 - 11:00 4513 MW

07-11-2025 11:00 - 12:00 4513 MW

07-11-2025 12:00 - 13:00 4513 MW

07-11-2025 13:00 - 14:00 4513 MW

07-11-2025 14:00 - 15:00 4513 MW

07-11-2025 15:00 - 16:00 4513 MW

07-11-2025 16:00 - 17:00 4513 MW

07-11-2025 17:00 - 18:00 4513 MW

07-11-2025 18:00 - 19:00 4513 MW

07-11-2025 19:00 - 20:00 4513 MW

07-11-2025 20:00 - 21:00 4513 MW

07-11-2025 21:00 - 22:00 4513 MW

07-11-2025 22:00 - 23:00 4513 MW

07-11-2025 23:00 - 00:00 4513 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.

Maintenance in Progress - eCAT Services Unavailable Until 15:00 CET

by JAO

Dear Market Participants,

Please note that the eCAT application is currently unavailable due to ongoing maintenance, expected to last until 15:00 CET.

Thank you for your understanding and patience as we continue working to improve our services.

Best regards,

JAO Operations

Resource Center

This section contains key information for market participants such as user guides, forms, auction rules, nomination deadlines and other documents.

Go to resources

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.

Get to know us

Register your company

We created a user guide to support the onboarding of market participants. Learn more about the steps to register, the required documents and our service desk platform.

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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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Do you need support?

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

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