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Annual Report

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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.

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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

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Capacity Curtailment on the ME-IT border for delivery period 18-09-2026

by JAO

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:

18-09-2026 00:00 - 01:00 140 MW

18-09-2026 01:00 - 02:00 140 MW

18-09-2026 02:00 - 03:00 140 MW

18-09-2026 03:00 - 04:00 140 MW

18-09-2026 04:00 - 05:00 140 MW

18-09-2026 05:00 - 06:00 140 MW

18-09-2026 06:00 - 07:00 140 MW

18-09-2026 07:00 - 08:00 140 MW

18-09-2026 08:00 - 09:00 140 MW

18-09-2026 09:00 - 10:00 140 MW

18-09-2026 10:00 - 11:00 140 MW

18-09-2026 11:00 - 12:00 140 MW

18-09-2026 12:00 - 13:00 140 MW

18-09-2026 13:00 - 14:00 140 MW

18-09-2026 14:00 - 15:00 140 MW

18-09-2026 15:00 - 16:00 140 MW

18-09-2026 16:00 - 17:00 140 MW

18-09-2026 17:00 - 18:00 140 MW

5. Amount of LTTR remaining after curtailment:

18-09-2026 00:00 - 01:00 0 MW

18-09-2026 01:00 - 02:00 0 MW

18-09-2026 02:00 - 03:00 0 MW

18-09-2026 03:00 - 04:00 0 MW

18-09-2026 04:00 - 05:00 0 MW

18-09-2026 05:00 - 06:00 0 MW

18-09-2026 06:00 - 07:00 0 MW

18-09-2026 07:00 - 08:00 0 MW

18-09-2026 08:00 - 09:00 0 MW

18-09-2026 09:00 - 10:00 0 MW

18-09-2026 10:00 - 11:00 0 MW

18-09-2026 11:00 - 12:00 0 MW

18-09-2026 12:00 - 13:00 0 MW

18-09-2026 13:00 - 14:00 0 MW

18-09-2026 14:00 - 15:00 0 MW

18-09-2026 15:00 - 16:00 0 MW

18-09-2026 16:00 - 17:00 0 MW

18-09-2026 17:00 - 18:00 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

Capacity Curtailment on the IT-ME border for delivery period 18-09-2026

by JAO

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:

18-09-2026 00:00 - 01:00 140 MW

18-09-2026 01:00 - 02:00 140 MW

18-09-2026 02:00 - 03:00 140 MW

18-09-2026 03:00 - 04:00 140 MW

18-09-2026 04:00 - 05:00 140 MW

18-09-2026 05:00 - 06:00 140 MW

18-09-2026 06:00 - 07:00 140 MW

18-09-2026 07:00 - 08:00 140 MW

18-09-2026 08:00 - 09:00 140 MW

18-09-2026 09:00 - 10:00 140 MW

18-09-2026 10:00 - 11:00 140 MW

18-09-2026 11:00 - 12:00 140 MW

18-09-2026 12:00 - 13:00 140 MW

18-09-2026 13:00 - 14:00 140 MW

18-09-2026 14:00 - 15:00 140 MW

18-09-2026 15:00 - 16:00 140 MW

18-09-2026 16:00 - 17:00 140 MW

18-09-2026 17:00 - 18:00 140 MW

5. Amount of LTTR remaining after curtailment:

18-09-2026 00:00 - 01:00 0 MW

18-09-2026 01:00 - 02:00 0 MW

18-09-2026 02:00 - 03:00 0 MW

18-09-2026 03:00 - 04:00 0 MW

18-09-2026 04:00 - 05:00 0 MW

18-09-2026 05:00 - 06:00 0 MW

18-09-2026 06:00 - 07:00 0 MW

18-09-2026 07:00 - 08:00 0 MW

18-09-2026 08:00 - 09:00 0 MW

18-09-2026 09:00 - 10:00 0 MW

18-09-2026 10:00 - 11:00 0 MW

18-09-2026 11:00 - 12:00 0 MW

18-09-2026 12:00 - 13:00 0 MW

18-09-2026 13:00 - 14:00 0 MW

18-09-2026 14:00 - 15:00 0 MW

18-09-2026 15:00 - 16:00 0 MW

18-09-2026 16:00 - 17:00 0 MW

18-09-2026 17:00 - 18:00 0 MW

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

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

Release Note | Publication Tool 1.5.1

by JAO

Dear Market Participants,

We are pleased to share the latest update to the Publication Tool. 

Improvements:

Nordic RCC Flow Based Domain Page

Description:

We have updated the disclaimer on the Nordic RCC Flow Based Domain page to clarify a technical hiccup from September 15th. While some IVAs were missing from the JAO publication, we want to reassure you that the actual capacities used for market coupling remained unaffected. It’s all about making sure you have the full picture, even when the tech gets a little grumpy.

If you have any questions, notice any unexpected behaviors regarding these updates or require further assistance, please contact us through JAO Support Hub. 

Kind regards,

JAO Operations

Capacity Curtailment on the IF1-GB-FR border for delivery period 29-09-2026

by JAO

1. TSO(s)*:

National Grid Interconnectors Limited (NGIC) and RTE EDF Transport S.A. (RTE)

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:

29-09-2026 00:00 - 01:00 900 MW

29-09-2026 01:00 - 02:00 900 MW

29-09-2026 02:00 - 03:00 900 MW

29-09-2026 03:00 - 04:00 900 MW

29-09-2026 04:00 - 05:00 900 MW

29-09-2026 05:00 - 06:00 900 MW

29-09-2026 06:00 - 07:00 900 MW

29-09-2026 07:00 - 08:00 900 MW

29-09-2026 08:00 - 09:00 900 MW

29-09-2026 09:00 - 10:00 900 MW

29-09-2026 10:00 - 11:00 900 MW

29-09-2026 11:00 - 12:00 900 MW

29-09-2026 12:00 - 13:00 900 MW

29-09-2026 13:00 - 14:00 900 MW

29-09-2026 14:00 - 15:00 900 MW

29-09-2026 15:00 - 16:00 900 MW

29-09-2026 16:00 - 17:00 900 MW

29-09-2026 17:00 - 18:00 900 MW

29-09-2026 18:00 - 19:00 900 MW

29-09-2026 19:00 - 20:00 900 MW

29-09-2026 20:00 - 21:00 900 MW

5. Amount of LTTR remaining after curtailment:

29-09-2026 00:00 - 01:00 0 MW

29-09-2026 01:00 - 02:00 0 MW

29-09-2026 02:00 - 03:00 0 MW

29-09-2026 03:00 - 04:00 0 MW

29-09-2026 04:00 - 05:00 0 MW

29-09-2026 05:00 - 06:00 0 MW

29-09-2026 06:00 - 07:00 0 MW

29-09-2026 07:00 - 08:00 0 MW

29-09-2026 08:00 - 09:00 0 MW

29-09-2026 09:00 - 10:00 0 MW

29-09-2026 10:00 - 11:00 0 MW

29-09-2026 11:00 - 12:00 0 MW

29-09-2026 12:00 - 13:00 0 MW

29-09-2026 13:00 - 14:00 0 MW

29-09-2026 14:00 - 15:00 0 MW

29-09-2026 15:00 - 16:00 0 MW

29-09-2026 16:00 - 17:00 0 MW

29-09-2026 17:00 - 18:00 0 MW

29-09-2026 18:00 - 19:00 0 MW

29-09-2026 19:00 - 20:00 0 MW

29-09-2026 20:00 - 21:00 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 unplanned maintenance

Capacity Curtailment on the IT-GR border for delivery period 16-09-2026

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:

16-09-2026 18:00 - 19:00 500 MW

16-09-2026 19:00 - 20:00 500 MW

16-09-2026 20:00 - 21:00 500 MW

16-09-2026 21:00 - 22:00 500 MW

5. Amount of LTTR remaining after curtailment:

16-09-2026 18:00 - 19:00 0 MW

16-09-2026 19:00 - 20:00 0 MW

16-09-2026 20:00 - 21:00 0 MW

16-09-2026 21:00 - 22:00 0 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 IT-SI border for delivery period 16-09-2026

by JAO

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:

16-09-2026 18:00 - 19:00 320 MW

16-09-2026 19:00 - 20:00 320 MW

16-09-2026 20:00 - 21:00 320 MW

16-09-2026 21:00 - 22:00 320 MW

5. Amount of LTTR remaining after curtailment:

16-09-2026 18:00 - 19:00 0 MW

16-09-2026 19:00 - 20:00 0 MW

16-09-2026 20:00 - 21:00 0 MW

16-09-2026 21:00 - 22:00 0 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 IT-FR border for delivery period 16-09-2026

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:

16-09-2026 18:00 - 19:00 366 MW

16-09-2026 19:00 - 20:00 366 MW

16-09-2026 20:00 - 21:00 366 MW

16-09-2026 21:00 - 22:00 366 MW

5. Amount of LTTR remaining after curtailment:

16-09-2026 18:00 - 19:00 0 MW

16-09-2026 19:00 - 20:00 0 MW

16-09-2026 20:00 - 21:00 0 MW

16-09-2026 21:00 - 22:00 0 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
 

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. 

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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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