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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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Ukrainian Intraday auctions visible in eCAT

Published: 02/07/2026 | 14:29 by JAO
Reminder - Invitation to Participate in LTFBA Test Session – July 9-10th, 2026

Published: 02/07/2026 | 08:06 by JAO
Capacity Curtailment on the ES-FR border for delivery period 03-07-2026

Published: 02/07/2026 | 07:35 by JAO
Capacity Curtailment on the IT-ME border for delivery period 03-07-2026

Published: 01/07/2026 | 15:43 by JAO
Capacity Curtailment on the ME-IT border for delivery period 03-07-2026

Published: 01/07/2026 | 15:43 by JAO
Capacity Curtailment on the ES-FR border for delivery period 02-07-2026

Published: 01/07/2026 | 07:21 by JAO
Capacity Curtailment on the FR-ES border for delivery period 02-07-2026

Published: 01/07/2026 | 07:20 by JAO

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As part of the ongoing technical preparation, Ukrainian intraday auctions (UA-SK and UA-HU) are already visible in eCAT. Please note that until the commercial go-live, no capacity will be offered through these auctions.

We kindly ask you to disregard these auctions until further notice.

We will share additional information regarding the commercial go-live and the availability of these products soon.

We are pleased to invite you to participate in upcoming LTFBA test sessions scheduled as follows:

Yearly Auction Test Session (CORE & Nordic Regions): 9 July 2026
Monthly Auction Test Session (CORE & Nordic Regions): 10 July 2026

These sessions are intended to provide Market Participants with the opportunity to:

Familiarise themselves with the LTFBA auction setup
Navigate the platform and explore its functionalities
Submit and manage bids within the tool

Please note that these sessions are dedicated to practical testing within our Auction tool's test environment, allowing participants to actively interact with the system and validate their processes.

Registration

Market Participants interested in joining are kindly requested to register by replying to this email with the following information:

Company name
EIC code
Name of participant(s)
Email address(es)
eCAT username(s) (if available)

Further details, including access information and session timelines, will be shared with registered participants ahead of the test dates.

Should you have any questions, please do not hesitate to contact us.
We look forward to your participation.

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:

03-07-2026 00:00 - 01:00 1280 MW

03-07-2026 01:00 - 02:00 1280 MW

03-07-2026 02:00 - 03:00 1280 MW

03-07-2026 03:00 - 04:00 1280 MW

03-07-2026 04:00 - 05:00 1280 MW

03-07-2026 05:00 - 06:00 1280 MW

03-07-2026 07:00 - 08:00 1280 MW

03-07-2026 08:00 - 09:00 1280 MW

03-07-2026 09:00 - 10:00 1280 MW

03-07-2026 10:00 - 11:00 1280 MW

03-07-2026 11:00 - 12:00 1280 MW

03-07-2026 12:00 - 13:00 1280 MW

03-07-2026 13:00 - 14:00 1280 MW

03-07-2026 14:00 - 15:00 1280 MW

03-07-2026 15:00 - 16:00 1280 MW

03-07-2026 16:00 - 17:00 1280 MW

03-07-2026 17:00 - 18:00 1280 MW

03-07-2026 18:00 - 19:00 1280 MW

5. Amount of LTTR remaining after curtailment:

03-07-2026 00:00 - 01:00 919 MW

03-07-2026 01:00 - 02:00 919 MW

03-07-2026 02:00 - 03:00 919 MW

03-07-2026 03:00 - 04:00 919 MW

03-07-2026 04:00 - 05:00 963 MW

03-07-2026 05:00 - 06:00 963 MW

03-07-2026 07:00 - 08:00 460 MW

03-07-2026 08:00 - 09:00 460 MW

03-07-2026 09:00 - 10:00 460 MW

03-07-2026 10:00 - 11:00 460 MW

03-07-2026 11:00 - 12:00 460 MW

03-07-2026 12:00 - 13:00 460 MW

03-07-2026 13:00 - 14:00 460 MW

03-07-2026 14:00 - 15:00 460 MW

03-07-2026 15:00 - 16:00 460 MW

03-07-2026 16:00 - 17:00 460 MW

03-07-2026 17:00 - 18:00 460 MW

03-07-2026 18:00 - 19:00 460 MW

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

03/07/2026

00:00-01:00 Network Security

01:00-02:00 Network Security

02:00-03:00 Network Security

03:00-04:00 Network Security

04:00-05:00 Network Security

05:00-06:00 Network Security

07:00-08:00 Balaruc-Montpellier 225kV

08:00-09:00 Balaruc-Montpellier 225kV

09:00-10:00 Balaruc-Montpellier 225kV

10:00-11:00 Balaruc-Montpellier 225kV

11:00-12:00 Balaruc-Montpellier 225kV

12:00-13:00 Balaruc-Montpellier 225kV

13:00-14:00 Balaruc-Montpellier 225kV

14:00-15:00 Balaruc-Montpellier 225kV

15:00-16:00 Balaruc-Montpellier 225kV

16:00-17:00 Balaruc-Montpellier 225kV

17:00-18:00 Balaruc-Montpellier 225kV

18:00-19:00 Balaruc-Montpellier 225kV

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)*:

CGES

2. Identification of affected Long Term Transmission Rights:

IT-ME

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

03-07-2026 06:00 - 07:00 400 MW

03-07-2026 07:00 - 08:00 400 MW

03-07-2026 08:00 - 09:00 400 MW

03-07-2026 09:00 - 10:00 400 MW

03-07-2026 10:00 - 11:00 400 MW

03-07-2026 11:00 - 12:00 400 MW

03-07-2026 12:00 - 13:00 400 MW

03-07-2026 13:00 - 14:00 400 MW

03-07-2026 14:00 - 15:00 400 MW

5. Amount of LTTR remaining after curtailment:

03-07-2026 06:00 - 07:00 0 MW

03-07-2026 07:00 - 08:00 0 MW

03-07-2026 08:00 - 09:00 0 MW

03-07-2026 09:00 - 10:00 0 MW

03-07-2026 10:00 - 11:00 0 MW

03-07-2026 11:00 - 12:00 0 MW

03-07-2026 12:00 - 13:00 0 MW

03-07-2026 13:00 - 14:00 0 MW

03-07-2026 14:00 - 15:00 0 MW

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

HVDC Monita

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)*:

CGES

2. Identification of affected Long Term Transmission Rights:

ME-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

03-07-2026 06:00 - 07:00 400 MW

03-07-2026 07:00 - 08:00 400 MW

03-07-2026 08:00 - 09:00 400 MW

03-07-2026 09:00 - 10:00 400 MW

03-07-2026 10:00 - 11:00 400 MW

03-07-2026 11:00 - 12:00 400 MW

03-07-2026 12:00 - 13:00 400 MW

03-07-2026 13:00 - 14:00 400 MW

03-07-2026 14:00 - 15:00 400 MW

5. Amount of LTTR remaining after curtailment:

03-07-2026 06:00 - 07:00 0 MW

03-07-2026 07:00 - 08:00 0 MW

03-07-2026 08:00 - 09:00 0 MW

03-07-2026 09:00 - 10:00 0 MW

03-07-2026 10:00 - 11:00 0 MW

03-07-2026 11:00 - 12:00 0 MW

03-07-2026 12:00 - 13:00 0 MW

03-07-2026 13:00 - 14:00 0 MW

03-07-2026 14:00 - 15:00 0 MW

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

HVDC Monita

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)*:

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:

02-07-2026 11:00 - 12:00 1280 MW

02-07-2026 12:00 - 13:00 1280 MW

02-07-2026 13:00 - 14:00 1280 MW

02-07-2026 14:00 - 15:00 1280 MW

02-07-2026 15:00 - 16:00 1280 MW

02-07-2026 16:00 - 17:00 1280 MW

02-07-2026 17:00 - 18:00 1280 MW

5. Amount of LTTR remaining after curtailment:

02-07-2026 11:00 - 12:00 963 MW

02-07-2026 12:00 - 13:00 963 MW

02-07-2026 13:00 - 14:00 963 MW

02-07-2026 14:00 - 15:00 963 MW

02-07-2026 15:00 - 16:00 712 MW

02-07-2026 16:00 - 17:00 712 MW

02-07-2026 17:00 - 18:00 712 MW

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

02/07/2026

11:00-12:00 Network Security

12:00-13:00 Network Security

13:00-14:00 Network Security

14:00-15:00 Network Security

15:00-16:00 Network Security

16:00-17:00 Network Security

17:00-18:00 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

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:

02-07-2026 04:00 - 05:00 1599 MW

02-07-2026 05:00 - 06:00 1599 MW

5. Amount of LTTR remaining after curtailment:

02-07-2026 04:00 - 05:00 1316 MW

02-07-2026 05:00 - 06:00 1316 MW

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

02/07/2026

04:00-05:00 Network Security

05:00-06:00 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

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.

Get to know us

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.

Go to registration