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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.

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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 IF1-FR-GB & IF1-GB-FR border for delivery period 13-11-2026

by JAO

1. TSO(s)*:

NGIC

2. Identification of affected Long Term Transmission Rights:

IF1-FR-GB

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

13-11-2026 00:00 - 01:00 1200 MW

13-11-2026 01:00 - 02:00 1200 MW

13-11-2026 02:00 - 03:00 1200 MW

13-11-2026 03:00 - 04:00 1200 MW

13-11-2026 04:00 - 05:00 1200 MW

13-11-2026 05:00 - 06:00 1200 MW

13-11-2026 06:00 - 07:00 1200 MW

13-11-2026 07:00 - 08:00 1200 MW

13-11-2026 08:00 - 09:00 1200 MW

13-11-2026 09:00 - 10:00 1200 MW

13-11-2026 10:00 - 11:00 1200 MW

13-11-2026 11:00 - 12:00 1200 MW

13-11-2026 12:00 - 13:00 1200 MW

13-11-2026 13:00 - 14:00 1200 MW

13-11-2026 14:00 - 15:00 1200 MW

13-11-2026 15:00 - 16:00 1200 MW

13-11-2026 16:00 - 17:00 1200 MW

13-11-2026 17:00 - 18:00 1200 MW

13-11-2026 18:00 - 19:00 1200 MW

13-11-2026 19:00 - 20:00 1200 MW

13-11-2026 20:00 - 21:00 1200 MW

13-11-2026 21:00 - 22:00 1200 MW

13-11-2026 22:00 - 23:00 1200 MW

13-11-2026 23:00 - 24:00 1200 MW

5. Amount of LTTR remaining after curtailment:

13-11-2026 00:00 - 01:00 966 MW

13-11-2026 01:00 - 02:00 966 MW

13-11-2026 02:00 - 03:00 966 MW

13-11-2026 03:00 - 04:00 966 MW

13-11-2026 04:00 - 05:00 966 MW

13-11-2026 05:00 - 06:00 966 MW

13-11-2026 06:00 - 07:00 966 MW

13-11-2026 07:00 - 08:00 966 MW

13-11-2026 08:00 - 09:00 966 MW

13-11-2026 09:00 - 10:00 966 MW

13-11-2026 10:00 - 11:00 966 MW

13-11-2026 11:00 - 12:00 966 MW

13-11-2026 12:00 - 13:00 966 MW

13-11-2026 13:00 - 14:00 966 MW

13-11-2026 14:00 - 15:00 966 MW

13-11-2026 15:00 - 16:00 966 MW

13-11-2026 16:00 - 17:00 966 MW

13-11-2026 17:00 - 18:00 966 MW

13-11-2026 18:00 - 19:00 966 MW

13-11-2026 19:00 - 20:00 966 MW

13-11-2026 20:00 - 21:00 966 MW

13-11-2026 21:00 - 22:00 966 MW

13-11-2026 22:00 - 23:00 966 MW

13-11-2026 23:00 - 24:00 966 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 planned maintenance

Capacity Curtailment on the FR-CH border for delivery period 12-11-2026

by JAO

1. TSO(s)*:

RTE, SWISSGRID

2. Identification of affected Long Term Transmission Rights:

FR-CH

3. Triggering event:

Curtailment due to Curtailment to ensure operation remains within Operational Security Limits

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

12-11-2026 00:00 - 01:00 370 MW

12-11-2026 01:00 - 02:00 370 MW

12-11-2026 02:00 - 03:00 370 MW

12-11-2026 03:00 - 04:00 370 MW

12-11-2026 04:00 - 05:00 370 MW

12-11-2026 05:00 - 06:00 370 MW

12-11-2026 06:00 - 07:00 370 MW

12-11-2026 07:00 - 08:00 370 MW

12-11-2026 08:00 - 09:00 370 MW

12-11-2026 09:00 - 10:00 370 MW

12-11-2026 10:00 - 11:00 370 MW

12-11-2026 11:00 - 12:00 370 MW

12-11-2026 12:00 - 13:00 370 MW

12-11-2026 13:00 - 14:00 370 MW

12-11-2026 14:00 - 15:00 370 MW

12-11-2026 15:00 - 16:00 370 MW

12-11-2026 16:00 - 17:00 370 MW

12-11-2026 17:00 - 18:00 370 MW

12-11-2026 18:00 - 19:00 370 MW

12-11-2026 19:00 - 20:00 370 MW

12-11-2026 20:00 - 21:00 370 MW

12-11-2026 21:00 - 22:00 370 MW

12-11-2026 22:00 - 23:00 370 MW

12-11-2026 23:00 - 24:00 370 MW

5. Amount of LTTR remaining after curtailment:

12-11-2026 00:00 - 01:00 0 MW

12-11-2026 01:00 - 02:00 0 MW

12-11-2026 02:00 - 03:00 0 MW

12-11-2026 03:00 - 04:00 0 MW

12-11-2026 04:00 - 05:00 0 MW

12-11-2026 05:00 - 06:00 0 MW

12-11-2026 06:00 - 07:00 0 MW

12-11-2026 07:00 - 08:00 0 MW

12-11-2026 08:00 - 09:00 0 MW

12-11-2026 09:00 - 10:00 0 MW

12-11-2026 10:00 - 11:00 0 MW

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

12-11-2026 12:00 - 13:00 0 MW

12-11-2026 13:00 - 14:00 0 MW

12-11-2026 14:00 - 15:00 0 MW

12-11-2026 15:00 - 16:00 0 MW

12-11-2026 16:00 - 17:00 0 MW

12-11-2026 17:00 - 18:00 0 MW

12-11-2026 18:00 - 19:00 0 MW

12-11-2026 19:00 - 20:00 0 MW

12-11-2026 20:00 - 21:00 0 MW

12-11-2026 21:00 - 22:00 0 MW

12-11-2026 22:00 - 23:00 0 MW

12-11-2026 23:00 - 24:00 0 MW

Reminder: SDAC Decoupling Training Session with Market Participants 25 November 2026 - Registration Open

by JAO

We are pleased to announce that the members’ testing for SDAC Market Coupling will take place on 25 November 2026.

It provides an opportunity to fine-tune processes, validate key scenarios, and ensure everything is in place.

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:

  • Delivery Date 26/11/2026 Full decoupling with shadow auction (including Nominations)

To register, please provide us 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: 17/11/2026. A reminder will be sent shortly before the end of the registration window.

Please find the information package attached.

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

Capacity Curtailment on the NSL-GB-N2 border for delivery period 11-11-2026

by JAO

1. TSO(s)*:

NGNSL_IC

2. Identification of affected Long Term Transmission Rights:

NSL-GB-N2

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

11-11-2026 16:00 - 17:00 98 MW

11-11-2026 17:00 - 18:00 98 MW

11-11-2026 18:00 - 19:00 98 MW

11-11-2026 19:00 - 20:00 98 MW

11-11-2026 20:00 - 21:00 98 MW

11-11-2026 21:00 - 22:00 98 MW

11-11-2026 22:00 - 23:00 98 MW

5. Amount of LTTR remaining after curtailment:

11-11-2026 16:00 - 17:00 0 MW

11-11-2026 17:00 - 18:00 0 MW

11-11-2026 18:00 - 19:00 0 MW

11-11-2026 19:00 - 20:00 0 MW

11-11-2026 20:00 - 21:00 0 MW

11-11-2026 21:00 - 22:00 0 MW

11-11-2026 22:00 - 23:00 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 NTC restrictions

Capacity Curtailment on the IT-GR border for delivery period 11-11-2026

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

IT-GR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

11-11-2026 00:00 - 01:00 500 MW

11-11-2026 01:00 - 02:00 500 MW

11-11-2026 02:00 - 03:00 500 MW

11-11-2026 03:00 - 04:00 500 MW

11-11-2026 04:00 - 05:00 500 MW

11-11-2026 05:00 - 06:00 500 MW

11-11-2026 06:00 - 07:00 500 MW

11-11-2026 07:00 - 08:00 500 MW

11-11-2026 08:00 - 09:00 500 MW

11-11-2026 09:00 - 10:00 500 MW

11-11-2026 10:00 - 11:00 500 MW

11-11-2026 11:00 - 12:00 500 MW

11-11-2026 12:00 - 13:00 500 MW

11-11-2026 13:00 - 14:00 500 MW

11-11-2026 14:00 - 15:00 500 MW

11-11-2026 15:00 - 16:00 500 MW

11-11-2026 16:00 - 17:00 500 MW

11-11-2026 17:00 - 18:00 500 MW

11-11-2026 18:00 - 19:00 500 MW

11-11-2026 19:00 - 20:00 500 MW

11-11-2026 20:00 - 21:00 500 MW

11-11-2026 21:00 - 22:00 500 MW

11-11-2026 22:00 - 23:00 500 MW

11-11-2026 23:00 - 24:00 500 MW

5. Amount of LTTR remaining after curtailment:

11-11-2026 00:00 - 01:00 0 MW

11-11-2026 01:00 - 02:00 0 MW

11-11-2026 02:00 - 03:00 0 MW

11-11-2026 03:00 - 04:00 0 MW

11-11-2026 04:00 - 05:00 0 MW

11-11-2026 05:00 - 06:00 0 MW

11-11-2026 06:00 - 07:00 0 MW

11-11-2026 07:00 - 08:00 0 MW

11-11-2026 08:00 - 09:00 0 MW

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

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

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

11-11-2026 12:00 - 13:00 0 MW

11-11-2026 13:00 - 14:00 0 MW

11-11-2026 14:00 - 15:00 0 MW

11-11-2026 15:00 - 16:00 0 MW

11-11-2026 16:00 - 17:00 0 MW

11-11-2026 17:00 - 18:00 0 MW

11-11-2026 18:00 - 19:00 0 MW

11-11-2026 19:00 - 20:00 0 MW

11-11-2026 20:00 - 21:00 0 MW

11-11-2026 21:00 - 22:00 0 MW

11-11-2026 22:00 - 23:00 0 MW

11-11-2026 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*:
HVDC cable ARACTHOS – GALATINA

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

Capacity Curtailment on the GR-IT border for delivery period 11-11-2026

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

GR-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

11-11-2026 00:00 - 01:00 499 MW

11-11-2026 01:00 - 02:00 499 MW

11-11-2026 02:00 - 03:00 499 MW

11-11-2026 03:00 - 04:00 499 MW

11-11-2026 04:00 - 05:00 499 MW

11-11-2026 05:00 - 06:00 499 MW

11-11-2026 06:00 - 07:00 499 MW

11-11-2026 07:00 - 08:00 499 MW

11-11-2026 08:00 - 09:00 499 MW

11-11-2026 09:00 - 10:00 499 MW

11-11-2026 10:00 - 11:00 499 MW

11-11-2026 11:00 - 12:00 499 MW

11-11-2026 12:00 - 13:00 499 MW

11-11-2026 13:00 - 14:00 499 MW

11-11-2026 14:00 - 15:00 499 MW

11-11-2026 15:00 - 16:00 499 MW

11-11-2026 16:00 - 17:00 499 MW

11-11-2026 17:00 - 18:00 499 MW

11-11-2026 18:00 - 19:00 499 MW

11-11-2026 19:00 - 20:00 499 MW

11-11-2026 20:00 - 21:00 499 MW

11-11-2026 21:00 - 22:00 499 MW

11-11-2026 22:00 - 23:00 499 MW

11-11-2026 23:00 - 24:00 499 MW

5. Amount of LTTR remaining after curtailment:

11-11-2026 00:00 - 01:00 0 MW

11-11-2026 01:00 - 02:00 0 MW

11-11-2026 02:00 - 03:00 0 MW

11-11-2026 03:00 - 04:00 0 MW

11-11-2026 04:00 - 05:00 0 MW

11-11-2026 05:00 - 06:00 0 MW

11-11-2026 06:00 - 07:00 0 MW

11-11-2026 07:00 - 08:00 0 MW

11-11-2026 08:00 - 09:00 0 MW

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

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

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

11-11-2026 12:00 - 13:00 0 MW

11-11-2026 13:00 - 14:00 0 MW

11-11-2026 14:00 - 15:00 0 MW

11-11-2026 15:00 - 16:00 0 MW

11-11-2026 16:00 - 17:00 0 MW

11-11-2026 17:00 - 18:00 0 MW

11-11-2026 18:00 - 19:00 0 MW

11-11-2026 19:00 - 20:00 0 MW

11-11-2026 20:00 - 21:00 0 MW

11-11-2026 21:00 - 22:00 0 MW

11-11-2026 22:00 - 23:00 0 MW

11-11-2026 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*:
HVDC cable ARACTHOS – GALATINA

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

Capacity Curtailment on the IT-AT border for delivery period 11-11-2026

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

IT-AT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

11-11-2026 07:00 - 08:00 108 MW

11-11-2026 08:00 - 09:00 108 MW

11-11-2026 09:00 - 10:00 108 MW

11-11-2026 10:00 - 11:00 108 MW

11-11-2026 11:00 - 12:00 108 MW

11-11-2026 12:00 - 13:00 108 MW

11-11-2026 13:00 - 14:00 108 MW

11-11-2026 14:00 - 15:00 108 MW

11-11-2026 15:00 - 16:00 108 MW

11-11-2026 16:00 - 17:00 108 MW

11-11-2026 17:00 - 18:00 108 MW

11-11-2026 18:00 - 19:00 108 MW

11-11-2026 19:00 - 20:00 108 MW

11-11-2026 20:00 - 21:00 108 MW

11-11-2026 21:00 - 22:00 108 MW

11-11-2026 22:00 - 23:00 108 MW

11-11-2026 23:00 - 24:00 108 MW

5. Amount of LTTR remaining after curtailment:

11-11-2026 07:00 - 08:00 7 MW

11-11-2026 08:00 - 09:00 7 MW

11-11-2026 09:00 - 10:00 7 MW

11-11-2026 10:00 - 11:00 7 MW

11-11-2026 11:00 - 12:00 7 MW

11-11-2026 12:00 - 13:00 7 MW

11-11-2026 13:00 - 14:00 7 MW

11-11-2026 14:00 - 15:00 7 MW

11-11-2026 15:00 - 16:00 7 MW

11-11-2026 16:00 - 17:00 7 MW

11-11-2026 17:00 - 18:00 7 MW

11-11-2026 18:00 - 19:00 7 MW

11-11-2026 19:00 - 20:00 7 MW

11-11-2026 20:00 - 21:00 7 MW

11-11-2026 21:00 - 22:00 7 MW

11-11-2026 22:00 - 23:00 7 MW

11-11-2026 23:00 - 24:00 37 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

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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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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Check out the common questions and our answers on how to use the auction platform.

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