See Our

Annual Report

Read here

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.

 

Go down

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

Invitation to the Test Session for the LTFBA Simulation Platform

by JAO

Dear Market Participants,

We are delighted to open the registration for our upcoming test session for the LTFBA Simulation Platform, which will run from August 7th to September 2nd, 2025.

This event presents an excellent opportunity for you to test out the Simulation Platform and will allow you to verify the flow-based capacity parameters and simulate long-term flow-based auctions.

The Simulation Platform supports the upload of two formats for the bid files:

• ECAN v4 XML bid document

• XLSX bid document

In case you would like to register, please reply to this  email with the following details:

--> Company name (registered companies only)

--> EIC code

--> Username (if you are already registered in eCAT) or your name

--> Email address

The registration for this test will conclude on July 30th, 2025. Further details will be communicated in a subsequent notice.

Should you have any questions or wish to share feedback, please do not hesitate to reach out to us. Your insights and participation are highly valued as we work together to enhance this process.

Best regards,

JAO Operations Team

eCAT Downtime on 24/07/2025

by JAO

Dear Market Participants,

Please be advised that an intervention is scheduled for 24/07/2025, starting at 14:00.

During this time, eCAT access will be unavailable between 14:00 and 15:00.

We appreciate your understanding as we work to enhance our services.

Kind regards,

Operations Team

Capacity Curtailment on the EL1-FR-GB border for delivery period 20-07-2025

by JAO

1. TSO(s)*:

ELECLINK

2. Identification of affected Long Term Transmission Rights:

EL1-FR-GB

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

20-07-2025 00:00 - 01:00 964 MW

20-07-2025 01:00 - 02:00 964 MW

20-07-2025 02:00 - 03:00 964 MW

20-07-2025 03:00 - 04:00 964 MW

20-07-2025 04:00 - 05:00 964 MW

20-07-2025 05:00 - 06:00 964 MW

20-07-2025 06:00 - 07:00 964 MW

20-07-2025 07:00 - 08:00 964 MW

20-07-2025 08:00 - 09:00 964 MW

5. Amount of LTTR remaining after curtailment:

20-07-2025 00:00 - 01:00 0 MW

20-07-2025 01:00 - 02:00 0 MW

20-07-2025 02:00 - 03:00 0 MW

20-07-2025 03:00 - 04:00 0 MW

20-07-2025 04:00 - 05:00 0 MW

20-07-2025 05:00 - 06:00 0 MW

20-07-2025 06:00 - 07:00 0 MW

20-07-2025 07:00 - 08:00 0 MW

20-07-2025 08:00 - 09:00 0 MW

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

Planned Outage

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

Maintenance for a Planned outage

Capacity Curtailment on the EL1-GB-FR border for delivery period 20-07-2025

by JAO

1. TSO(s)*:

ELECLINK

2. Identification of affected Long Term Transmission Rights:

EL1-GB-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

20-07-2025 00:00 - 01:00 963 MW

20-07-2025 01:00 - 02:00 963 MW

20-07-2025 02:00 - 03:00 963 MW

20-07-2025 03:00 - 04:00 963 MW

20-07-2025 04:00 - 05:00 963 MW

20-07-2025 05:00 - 06:00 963 MW

20-07-2025 06:00 - 07:00 963 MW

20-07-2025 07:00 - 08:00 963 MW

20-07-2025 08:00 - 09:00 963 MW

5. Amount of LTTR remaining after curtailment:

20-07-2025 00:00 - 01:00 0 MW

20-07-2025 01:00 - 02:00 0 MW

20-07-2025 02:00 - 03:00 0 MW

20-07-2025 03:00 - 04:00 0 MW

20-07-2025 04:00 - 05:00 0 MW

20-07-2025 05:00 - 06:00 0 MW

20-07-2025 06:00 - 07:00 0 MW

20-07-2025 07:00 - 08:00 0 MW

20-07-2025 08:00 - 09:00 0 MW

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

Planned Outage

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

Maintenance for a Planned outage

Capacity Curtailment on the EL1-GB-FR border for delivery period 19-07-2025

by JAO

1. TSO(s)*:

ELECLINK

2. Identification of affected Long Term Transmission Rights:

EL1-GB-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

19-07-2025 21:00 - 22:00 963 MW

19-07-2025 22:00 - 23:00 963 MW

19-07-2025 23:00 - 24:00 963 MW

5. Amount of LTTR remaining after curtailment:

19-07-2025 21:00 - 22:00 0 MW

19-07-2025 22:00 - 23:00 0 MW

19-07-2025 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:

Planned Outage

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

Maintenance for a Planned outage

Capacity Curtailment on the IT-FR border for delivery period 18-07-2025

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

IT-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

18-07-2025 18:00 - 19:00 1870 MW

18-07-2025 19:00 - 20:00 1870 MW

18-07-2025 20:00 - 21:00 1870 MW

5. Amount of LTTR remaining after curtailment:

18-07-2025 18:00 - 19:00 1816 MW

18-07-2025 19:00 - 20:00 1816 MW

18-07-2025 20:00 - 21:00 1816 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 EL1-FR-GB border for delivery period 19-07-2025

by JAO

1. TSO(s)*:

ELECLINK

2. Identification of affected Long Term Transmission Rights:

EL1-FR-GB

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

19-07-2025 21:00 - 22:00 964 MW

19-07-2025 22:00 - 23:00 964 MW

19-07-2025 23:00 - 24:00 964 MW

5. Amount of LTTR remaining after curtailment:

19-07-2025 21:00 - 22:00 0 MW

19-07-2025 22:00 - 23:00 0 MW

19-07-2025 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:

Planned Outage

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

Maintenance for a Planned outage

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
Image
JAO workers

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!