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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 IT-SI border for delivery period 15-07-2026

Published: 14/07/2026 | 07:38 by JAO
Capacity Curtailment on the IT-FR border for delivery period 15-07-2026

Published: 14/07/2026 | 07:35 by JAO
Capacity Curtailment on the IT-AT border for delivery period 15-07-2026

Published: 14/07/2026 | 07:34 by JAO
Capacity Curtailment on the IT-CH border for delivery period 15-07-2026

Published: 14/07/2026 | 07:30 by JAO
Capacity Curtailment on the FR-ES border for delivery period 15-07-2026

Published: 14/07/2026 | 07:04 by JAO
Capacity Curtailment on the ES-FR border for delivery period 15-07-2026

Published: 14/07/2026 | 07:03 by JAO
IF1-FR-GB-H-BASE---270401-04 Cancellation and Additional Round Creation

Published: 13/07/2026 | 15:17 by JAO

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1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

IT-SI

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

15-07-2026 18:00 - 19:00 315 MW

15-07-2026 19:00 - 20:00 315 MW

15-07-2026 20:00 - 21:00 315 MW

15-07-2026 21:00 - 22:00 315 MW

15-07-2026 22:00 - 23:00 315 MW

5. Amount of LTTR remaining after curtailment:

15-07-2026 18:00 - 19:00 258 MW

15-07-2026 19:00 - 20:00 0 MW

15-07-2026 20:00 - 21:00 0 MW

15-07-2026 21:00 - 22:00 0 MW

15-07-2026 22:00 - 23:00 226 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

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:

15-07-2026 18:00 - 19:00 1370 MW

15-07-2026 19:00 - 20:00 1370 MW

15-07-2026 20:00 - 21:00 1370 MW

15-07-2026 21:00 - 22:00 1370 MW

15-07-2026 22:00 - 23:00 1370 MW

5. Amount of LTTR remaining after curtailment:

15-07-2026 18:00 - 19:00 650 MW

15-07-2026 19:00 - 20:00 0 MW

15-07-2026 20:00 - 21:00 0 MW

15-07-2026 21:00 - 22:00 0 MW

15-07-2026 22:00 - 23:00 694 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

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:

15-07-2026 18:00 - 19:00 73 MW

15-07-2026 19:00 - 20:00 73 MW

15-07-2026 20:00 - 21:00 73 MW

15-07-2026 21:00 - 22:00 73 MW

15-07-2026 22:00 - 23:00 73 MW

5. Amount of LTTR remaining after curtailment:

15-07-2026 18:00 - 19:00 34 MW

15-07-2026 19:00 - 20:00 0 MW

15-07-2026 20:00 - 21:00 0 MW

15-07-2026 21:00 - 22:00 0 MW

15-07-2026 22:00 - 23:00 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

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

IT-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:

15-07-2026 18:00 - 19:00 719 MW

15-07-2026 19:00 - 20:00 719 MW

15-07-2026 20:00 - 21:00 719 MW

15-07-2026 21:00 - 22:00 719 MW

15-07-2026 22:00 - 23:00 719 MW

5. Amount of LTTR remaining after curtailment:

15-07-2026 18:00 - 19:00 591 MW

15-07-2026 19:00 - 20:00 0 MW

15-07-2026 20:00 - 21:00 0 MW

15-07-2026 21:00 - 22:00 0 MW

15-07-2026 22:00 - 23:00 591 MW

1. TSO(s)*:

RTE-TSO

2. Identification of affected Long Term Transmission Rights:

FR-ES

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

15-07-2026 00:00 - 01:00 1599 MW

15-07-2026 01:00 - 02:00 1599 MW

15-07-2026 02:00 - 03:00 1599 MW

15-07-2026 03:00 - 04:00 1599 MW

15-07-2026 04:00 - 05:00 1599 MW

15-07-2026 05:00 - 06:00 1599 MW

15-07-2026 06:00 - 07:00 1599 MW

15-07-2026 07:00 - 08:00 1599 MW

15-07-2026 08:00 - 09:00 1599 MW

15-07-2026 09:00 - 10:00 1599 MW

15-07-2026 20:00 - 21:00 1599 MW

15-07-2026 21:00 - 22:00 1599 MW

15-07-2026 22:00 - 23:00 1599 MW

15-07-2026 23:00 - 24:00 1599 MW

5. Amount of LTTR remaining after curtailment:

15-07-2026 00:00 - 01:00 973 MW

15-07-2026 01:00 - 02:00 973 MW

15-07-2026 02:00 - 03:00 973 MW

15-07-2026 03:00 - 04:00 973 MW

15-07-2026 04:00 - 05:00 973 MW

15-07-2026 05:00 - 06:00 973 MW

15-07-2026 06:00 - 07:00 973 MW

15-07-2026 07:00 - 08:00 973 MW

15-07-2026 08:00 - 09:00 973 MW

15-07-2026 09:00 - 10:00 973 MW

15-07-2026 20:00 - 21:00 973 MW

15-07-2026 21:00 - 22:00 973 MW

15-07-2026 22:00 - 23:00 973 MW

15-07-2026 23:00 - 24:00 973 MW

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

15/07/2026

00:00-01:00 BRAUD - CUBNEZAIS 3

01:00-02:00 BRAUD - CUBNEZAIS 3

02:00-03:00 BRAUD - CUBNEZAIS 3

03:00-04:00 BRAUD - CUBNEZAIS 3

04:00-05:00 BRAUD - CUBNEZAIS 3

05:00-06:00 BRAUD - CUBNEZAIS 3

06:00-07:00 BRAUD - CUBNEZAIS 3

07:00-08:00 BRAUD - CUBNEZAIS 3

08:00-09:00 BRAUD - CUBNEZAIS 3

09:00-10:00 BRAUD - CUBNEZAIS 3

20:00-21:00 BRAUD - CUBNEZAIS 3

21:00-22:00 BRAUD - CUBNEZAIS 3

22:00-23:00 BRAUD - CUBNEZAIS 3

23:00-24:00 BRAUD - CUBNEZAIS 3

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

The available remedial actions were assessed as insufficient or ineffective to avoid the violation of operational security limits

1. TSO(s)*:

RTE-TSO

2. Identification of affected Long Term Transmission Rights:

ES-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

15-07-2026 11:00 - 12:00 1280 MW

15-07-2026 12:00 - 13:00 1280 MW

15-07-2026 13:00 - 14:00 1280 MW

15-07-2026 14:00 - 15:00 1280 MW

15-07-2026 18:00 - 19:00 1280 MW

15-07-2026 19:00 - 20:00 1280 MW

15-07-2026 20:00 - 21:00 1280 MW

15-07-2026 21:00 - 22:00 1280 MW

15-07-2026 22:00 - 23:00 1280 MW

15-07-2026 23:00 - 24:00 1280 MW

5. Amount of LTTR remaining after curtailment:

15-07-2026 11:00 - 12:00 670 MW

15-07-2026 12:00 - 13:00 670 MW

15-07-2026 13:00 - 14:00 670 MW

15-07-2026 14:00 - 15:00 670 MW

15-07-2026 18:00 - 19:00 776 MW

15-07-2026 19:00 - 20:00 776 MW

15-07-2026 20:00 - 21:00 454 MW

15-07-2026 21:00 - 22:00 297 MW

15-07-2026 22:00 - 23:00 321 MW

15-07-2026 23:00 - 24:00 624 MW

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

15/07/2026

11:00-12:00 Network Security

12:00-13:00 Network Security

13:00-14:00 Network Security

14:00-15:00 Network Security

18:00-19:00 Network Security

19:00-20:00 Network Security

20:00-21:00 Network Security

21:00-22:00 Network Security

22:00-23:00 Network Security

23:00-24:00 Network Security

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

The available remedial actions were assessed as insufficient or ineffective to avoid the violation of operational security limits

Please be informed that, due to issues affecting the integration of resale notifications, the following auction has been cancelled: IF1-FR-GB-H-BASE---270401-04

A new auction for the same horizon will be opened on 15th July 2026 at 12:20, with the Auction ID: IF1-FR-GB-H-BASE---270401-05

Resale notifications may be submitted until 12:08 on 14th July 2026.

As you may be aware, JAO is currently experiencing technical issues affecting the processing of resale notifications submitted by market participants. Therefore, should you wish to place a resale, please do not hesitate to contact us.

We will be happy to submit the resale on your behalf, provided that the request is submitted with sufficient time before the deadline and followed up with a call to +352 27 62 38 38

Thank you for your understanding.

Resource Center

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

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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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