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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

500+

Registered market participants
26k+

Auctions held annually
100%

Auction tool availability
80+

Employees
50

TSOs serviced

Latest market messages

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Capacity Curtailment on the DE-AT border for delivery period 10-12-2025

Published: 08/12/2025 | 15:10 by JAO
SDAC_JAO_01 : SDAC market coupling 09/12 - Session complete

Published: 08/12/2025 | 13:11 by JAO
[SDAC_ExC_02]: Delay in Market Coupling Results publication

Published: 08/12/2025 | 13:03 by JAO
Public consultation report - Rules for daily capacity allocation on Swiss borders

Published: 08/12/2025 | 10:04 by JAO
ID1 NLL-BE<>GB : Please Download Rights Documents Directly from Auction Tool

Published: 07/12/2025 | 23:04 by JAO
Capacity Curtailment on the DE-AT border for delivery period 09-12-2025

Published: 07/12/2025 | 13:55 by JAO
Capacity Curtailment on the SI-IT border for delivery period 08-12-2025

Published: 07/12/2025 | 07:49 by JAO

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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 / hour for each concerned period:

10-12-2025 00:00 - 01:00 4819 MW

10-12-2025 01:00 - 02:00 4819 MW

10-12-2025 02:00 - 03:00 4819 MW

10-12-2025 03:00 - 04:00 4819 MW

10-12-2025 04:00 - 05:00 4819 MW

10-12-2025 05:00 - 06:00 4819 MW

10-12-2025 06:00 - 07:00 4819 MW

10-12-2025 07:00 - 08:00 4819 MW

10-12-2025 08:00 - 09:00 4819 MW

10-12-2025 09:00 - 10:00 4819 MW

10-12-2025 10:00 - 11:00 4819 MW

10-12-2025 11:00 - 12:00 4819 MW

10-12-2025 12:00 - 13:00 4819 MW

10-12-2025 13:00 - 14:00 4819 MW

10-12-2025 14:00 - 15:00 4819 MW

10-12-2025 15:00 - 16:00 4819 MW

10-12-2025 16:00 - 17:00 4819 MW

10-12-2025 17:00 - 18:00 4819 MW

10-12-2025 18:00 - 19:00 4819 MW

10-12-2025 19:00 - 20:00 4819 MW

10-12-2025 20:00 - 21:00 4819 MW

10-12-2025 21:00 - 22:00 4819 MW

10-12-2025 22:00 - 23:00 4819 MW

10-12-2025 23:00 - 24:00 4819 MW

5. Amount of LTTR remaining after curtailment:

10-12-2025 00:00 - 01:00 4458 MW

10-12-2025 01:00 - 02:00 4458 MW

10-12-2025 02:00 - 03:00 4458 MW

10-12-2025 03:00 - 04:00 4458 MW

10-12-2025 04:00 - 05:00 4458 MW

10-12-2025 05:00 - 06:00 4458 MW

10-12-2025 06:00 - 07:00 4458 MW

10-12-2025 07:00 - 08:00 4458 MW

10-12-2025 08:00 - 09:00 4458 MW

10-12-2025 09:00 - 10:00 4458 MW

10-12-2025 10:00 - 11:00 4458 MW

10-12-2025 11:00 - 12:00 4458 MW

10-12-2025 12:00 - 13:00 4458 MW

10-12-2025 13:00 - 14:00 4458 MW

10-12-2025 14:00 - 15:00 4458 MW

10-12-2025 15:00 - 16:00 4458 MW

10-12-2025 16:00 - 17:00 4458 MW

10-12-2025 17:00 - 18:00 4458 MW

10-12-2025 18:00 - 19:00 4458 MW

10-12-2025 19:00 - 20:00 4458 MW

10-12-2025 20:00 - 21:00 4458 MW

10-12-2025 21:00 - 22:00 4458 MW

10-12-2025 22:00 - 23:00 4458 MW

10-12-2025 23:00 - 24:00 4458 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.

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

Please be aware that the publication of the 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. Therefore, if relevant, we advise you to update your shadow bids at JAO eCAT platform before 14:10. Best regards, JAO Operations

Following the public consultations held between the 27th October and 26th November 2025 on the “Rules for daily capacity allocation on Swiss borders”, we would like to thank all participants for their valuable contributions. We have compiled a summary document that details the comments received and the corresponding responses from the TSOs.

The report is also available under our consultation page.

Should you have any question or require further information, please do not hesitate to contact us.

JAO Operations Team, on behalf of the TSOs

Due to a current technical issue, we kindly ask you to download the Allocation Results and Rights Documents directly from the auction tool. Thank you for your understanding.

Kind regards,

JAO Operations

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 / hour for each concerned period:

09-12-2025 00:00 - 01:00 4819 MW

09-12-2025 01:00 - 02:00 4819 MW

09-12-2025 02:00 - 03:00 4819 MW

09-12-2025 03:00 - 04:00 4819 MW

09-12-2025 04:00 - 05:00 4819 MW

09-12-2025 05:00 - 06:00 4819 MW

09-12-2025 06:00 - 07:00 4819 MW

09-12-2025 07:00 - 08:00 4819 MW

09-12-2025 08:00 - 09:00 4819 MW

09-12-2025 09:00 - 10:00 4819 MW

09-12-2025 10:00 - 11:00 4819 MW

09-12-2025 11:00 - 12:00 4819 MW

09-12-2025 12:00 - 13:00 4819 MW

09-12-2025 13:00 - 14:00 4819 MW

09-12-2025 14:00 - 15:00 4819 MW

09-12-2025 15:00 - 16:00 4819 MW

09-12-2025 16:00 - 17:00 4819 MW

09-12-2025 17:00 - 18:00 4819 MW

09-12-2025 18:00 - 19:00 4819 MW

09-12-2025 19:00 - 20:00 4819 MW

09-12-2025 20:00 - 21:00 4819 MW

09-12-2025 21:00 - 22:00 4819 MW

09-12-2025 22:00 - 23:00 4819 MW

09-12-2025 23:00 - 24:00 4819 MW

5. Amount of LTTR remaining after curtailment:

09-12-2025 00:00 - 01:00 4458 MW

09-12-2025 01:00 - 02:00 4458 MW

09-12-2025 02:00 - 03:00 4458 MW

09-12-2025 03:00 - 04:00 4458 MW

09-12-2025 04:00 - 05:00 4458 MW

09-12-2025 05:00 - 06:00 4458 MW

09-12-2025 06:00 - 07:00 4458 MW

09-12-2025 07:00 - 08:00 4458 MW

09-12-2025 08:00 - 09:00 4458 MW

09-12-2025 09:00 - 10:00 4458 MW

09-12-2025 10:00 - 11:00 4458 MW

09-12-2025 11:00 - 12:00 4458 MW

09-12-2025 12:00 - 13:00 4458 MW

09-12-2025 13:00 - 14:00 4458 MW

09-12-2025 14:00 - 15:00 4458 MW

09-12-2025 15:00 - 16:00 4458 MW

09-12-2025 16:00 - 17:00 4458 MW

09-12-2025 17:00 - 18:00 4458 MW

09-12-2025 18:00 - 19:00 4458 MW

09-12-2025 19:00 - 20:00 4458 MW

09-12-2025 20:00 - 21:00 4458 MW

09-12-2025 21:00 - 22:00 4458 MW

09-12-2025 22:00 - 23:00 4458 MW

09-12-2025 23:00 - 24:00 4458 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

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:
08-12-2025 12:00 - 13:00 271 MW

5. Amount of LTTR remaining after curtailment:
08-12-2025 12:00 - 13:00 243 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

*According to section 57.3 of the EU HAR, this field can be filled in within 24 hours after the initial publication

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.

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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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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