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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 IF1-GB-FR border for delivery period 01-10-2026 -12-10-2027

by JAO

1. TSO(s)*:

RNP

2. Identification of affected Long Term Transmission Rights:

IF1-GB-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

01-10-2026 to 12-10-12026

00:00 - 01:00 1299 MW

 01:00 - 02:00 1299 MW

 02:00 - 03:00 1299 MW

 03:00 - 04:00 1299 MW

 04:00 - 05:00 1299 MW

 05:00 - 06:00 1299 MW

 06:00 - 07:00 1299 MW

 07:00 - 08:00 1299 MW

 08:00 - 09:00 1299 MW

 09:00 - 10:00 1299 MW

 10:00 - 11:00 1299 MW

 11:00 - 12:00 1299 MW

 12:00 - 13:00 1299 MW

 13:00 - 14:00 1299 MW

 14:00 - 15:00 1299 MW

 15:00 - 16:00 1299 MW

 16:00 - 17:00 1299 MW

 17:00 - 18:00 1299 MW

 18:00 - 19:00 1299 MW

 19:00 - 20:00 1299 MW

 20:00 - 21:00 1299 MW

 21:00 - 22:00 1299 MW

 22:00 - 23:00 1299 MW

 23:00 - 24:00 1299 MW

5. Amount of LTTR remaining after curtailment:

01-10-2026 to 12-10-12026

00:00 - 01:00 957 MW

 01:00 - 02:00 957 MW

 02:00 - 03:00 957 MW

 03:00 - 04:00 957 MW

 04:00 - 05:00 957 MW

 05:00 - 06:00 957 MW

 06:00 - 07:00 957 MW

 07:00 - 08:00 957 MW

 08:00 - 09:00 957 MW

 09:00 - 10:00 957 MW

 10:00 - 11:00 957 MW

 11:00 - 12:00 957 MW

 12:00 - 13:00 957 MW

 13:00 - 14:00 957 MW

 14:00 - 15:00 957 MW

 15:00 - 16:00 957 MW

 16:00 - 17:00 957 MW

 17:00 - 18:00 957 MW

 18:00 - 19:00 957 MW

 19:00 - 20:00 957 MW

 20:00 - 21:00 957 MW

 21:00 - 22:00 957 MW

 22:00 - 23:00 957 MW

 23:00 - 24:00 957 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

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

Capacity Curtailment on the IF1-GB-FR border for delivery period 30-09-2026

by JAO

1. TSO(s)*:

RNP

2. Identification of affected Long Term Transmission Rights:

IF1-GB-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

30-09-2026 00:00 - 01:00 1697 MW

30-09-2026 01:00 - 02:00 1697 MW

30-09-2026 02:00 - 03:00 1697 MW

30-09-2026 03:00 - 04:00 1697 MW

30-09-2026 04:00 - 05:00 1697 MW

30-09-2026 05:00 - 06:00 1697 MW

30-09-2026 06:00 - 07:00 1697 MW

30-09-2026 07:00 - 08:00 1697 MW

30-09-2026 08:00 - 09:00 1697 MW

30-09-2026 09:00 - 10:00 1697 MW

30-09-2026 10:00 - 11:00 1697 MW

30-09-2026 11:00 - 12:00 1697 MW

30-09-2026 12:00 - 13:00 1697 MW

30-09-2026 13:00 - 14:00 1697 MW

30-09-2026 14:00 - 15:00 1697 MW

30-09-2026 15:00 - 16:00 1697 MW

30-09-2026 16:00 - 17:00 1697 MW

30-09-2026 17:00 - 18:00 1697 MW

30-09-2026 18:00 - 19:00 1697 MW

30-09-2026 19:00 - 20:00 1697 MW

30-09-2026 20:00 - 21:00 1697 MW

30-09-2026 21:00 - 22:00 1697 MW

30-09-2026 22:00 - 23:00 1697 MW

30-09-2026 23:00 - 24:00 1697 MW

5. Amount of LTTR remaining after curtailment:

30-09-2026 00:00 - 01:00 935 MW

30-09-2026 01:00 - 02:00 935 MW

30-09-2026 02:00 - 03:00 935 MW

30-09-2026 03:00 - 04:00 935 MW

30-09-2026 04:00 - 05:00 935 MW

30-09-2026 05:00 - 06:00 935 MW

30-09-2026 06:00 - 07:00 935 MW

30-09-2026 07:00 - 08:00 935 MW

30-09-2026 08:00 - 09:00 935 MW

30-09-2026 09:00 - 10:00 935 MW

30-09-2026 10:00 - 11:00 935 MW

30-09-2026 11:00 - 12:00 935 MW

30-09-2026 12:00 - 13:00 935 MW

30-09-2026 13:00 - 14:00 935 MW

30-09-2026 14:00 - 15:00 935 MW

30-09-2026 15:00 - 16:00 935 MW

30-09-2026 16:00 - 17:00 935 MW

30-09-2026 17:00 - 18:00 935 MW

30-09-2026 18:00 - 19:00 935 MW

30-09-2026 19:00 - 20:00 935 MW

30-09-2026 20:00 - 21:00 935 MW

30-09-2026 21:00 - 22:00 935 MW

30-09-2026 22:00 - 23:00 935 MW

30-09-2026 23:00 - 24:00 935 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

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

JAO Publication Tool API | Best Practice Guide

by JAO
Dear Market Participants, 
To make working with the JAO Publication Tool API easier, we have published a new API Usage and Best Practice Guide.

The guide explains recommended ways to retrieve data, helping Market Participants use the API more efficiently and avoid common issues.

You can find the document here: https://www.jao.eu/page-api/publication-tool
Kind regards,
JAO Support Team

Long Term Flow-Based Allocation | FAQ

by JAO

Dear Market Participants,


To support market participants in preparing for Long-Term Flow-Based Allocation, we have published a dedicated FAQ document addressing key questions on the topic. The document provides practical information and clarification on the relevant processes and is intended to serve as a useful reference for market participants. 
You can find the document here: Long-Term Flow-Based Allocation FAQ
If you have any further questions, please contact us through JAO Support Hub.
Thank you for your continued cooperation.

Kind regards,
JAO Support Team

Capacity Curtailment on the SI-AT border for delivery period 29-09-2026

by JAO

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

SI-AT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

29-09-2026 08:00 - 09:00 310 MW

29-09-2026 09:00 - 10:00 310 MW

29-09-2026 10:00 - 11:00 310 MW

29-09-2026 11:00 - 12:00 310 MW

29-09-2026 12:00 - 13:00 310 MW

29-09-2026 13:00 - 14:00 310 MW

29-09-2026 14:00 - 15:00 310 MW

29-09-2026 15:00 - 16:00 310 MW

5. Amount of LTTR remaining after curtailment:

29-09-2026 08:00 - 09:00 233 MW

29-09-2026 09:00 - 10:00 216 MW

29-09-2026 10:00 - 11:00 140 MW

29-09-2026 11:00 - 12:00 183 MW

29-09-2026 12:00 - 13:00 171 MW

29-09-2026 13:00 - 14:00 186 MW

29-09-2026 14:00 - 15:00 186 MW

29-09-2026 15:00 - 16:00 192 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.

Capacity Curtailment on the HU-AT border for delivery period 29-09-2026

by JAO

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

HU-AT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

29-09-2026 10:00 - 11:00 260 MW

5. Amount of LTTR remaining after curtailment:

29-09-2026 10:00 - 11:00 214 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.

Capacity Curtailment on the AT-CZ border for delivery period 29-09-2026

by JAO

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

AT-CZ

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

29-09-2026 08:00 - 09:00 350 MW

29-09-2026 09:00 - 10:00 350 MW

29-09-2026 10:00 - 11:00 350 MW

29-09-2026 11:00 - 12:00 350 MW

29-09-2026 12:00 - 13:00 350 MW

29-09-2026 13:00 - 14:00 350 MW

29-09-2026 14:00 - 15:00 350 MW

29-09-2026 15:00 - 16:00 350 MW

5. Amount of LTTR remaining after curtailment:

29-09-2026 08:00 - 09:00 94 MW

29-09-2026 09:00 - 10:00 135 MW

29-09-2026 10:00 - 11:00 41 MW

29-09-2026 11:00 - 12:00 114 MW

29-09-2026 12:00 - 13:00 113 MW

29-09-2026 13:00 - 14:00 117 MW

29-09-2026 14:00 - 15:00 114 MW

29-09-2026 15:00 - 16:00 138 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.

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.

Get to know us
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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!