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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.

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

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Capacity Curtailment on the IT-CH border for delivery period 07-10-2026

by JAO

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:

07-10-2026 17:00 - 18:00 925 MW

07-10-2026 18:00 - 19:00 925 MW

07-10-2026 19:00 - 20:00 925 MW

07-10-2026 20:00 - 21:00 925 MW

07-10-2026 21:00 - 22:00 925 MW

5. Amount of LTTR remaining after curtailment:

07-10-2026 17:00 - 18:00 590 MW

07-10-2026 18:00 - 19:00 0 MW

07-10-2026 19:00 - 20:00 0 MW

07-10-2026 20:00 - 21:00 0 MW

07-10-2026 21:00 - 22:00 590 MW

Capacity Curtailment on the IT-SI border for delivery period 07-10-2026

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:

07-10-2026 17:00 - 18:00 334 MW

07-10-2026 18:00 - 19:00 334 MW

07-10-2026 19:00 - 20:00 334 MW

07-10-2026 20:00 - 21:00 334 MW

07-10-2026 21:00 - 22:00 334 MW

5. Amount of LTTR remaining after curtailment:

07-10-2026 17:00 - 18:00 215 MW

07-10-2026 18:00 - 19:00 0 MW

07-10-2026 19:00 - 20:00 0 MW

07-10-2026 20:00 - 21:00 0 MW

07-10-2026 21:00 - 22:00 215 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 IT-FR border for delivery period 07-10-2026

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:

07-10-2026 18:00 - 19:00 628 MW

07-10-2026 19:00 - 20:00 628 MW

07-10-2026 20:00 - 21:00 628 MW

5. Amount of LTTR remaining after curtailment:

07-10-2026 18:00 - 19:00 0 MW

07-10-2026 19:00 - 20:00 0 MW

07-10-2026 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*:
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 AT-IT border for delivery period 07-10-2026

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

AT-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

07-10-2026 07:00 - 08:00 222 MW

07-10-2026 08:00 - 09:00 222 MW

5. Amount of LTTR remaining after curtailment:

07-10-2026 07:00 - 08:00 172 MW

07-10-2026 08:00 - 09:00 172 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 IT-AT border for delivery period 07-10-2026

by JAO



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:

07-10-2026 17:00 - 18:00 97 MW

07-10-2026 18:00 - 19:00 97 MW

07-10-2026 19:00 - 20:00 97 MW

07-10-2026 20:00 - 21:00 97 MW

07-10-2026 21:00 - 22:00 97 MW

5. Amount of LTTR remaining after curtailment:

07-10-2026 17:00 - 18:00 64 MW

07-10-2026 18:00 - 19:00 4 MW

07-10-2026 19:00 - 20:00 4 MW

07-10-2026 20:00 - 21:00 4 MW

07-10-2026 21:00 - 22:00 64 MW

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

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

*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 IT-GR border for delivery period 07-10-2026

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:

07-10-2026 15:00 - 16:00 500 MW

07-10-2026 16:00 - 17:00 500 MW

07-10-2026 17:00 - 18:00 500 MW

07-10-2026 18:00 - 19:00 500 MW

07-10-2026 19:00 - 20:00 500 MW

07-10-2026 20:00 - 21:00 500 MW

5. Amount of LTTR remaining after curtailment:

07-10-2026 15:00 - 16:00 0 MW

07-10-2026 16:00 - 17:00 0 MW

07-10-2026 17:00 - 18:00 0 MW

07-10-2026 18:00 - 19:00 0 MW

07-10-2026 19:00 - 20:00 0 MW

07-10-2026 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*:
HVDC cable ARACTHOS – GALATINA

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

 

Capacity Curtailment on the SI-AT border for delivery period 07-10-2026

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:

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

07-10-2026 11:00 - 12:00 400 MW

07-10-2026 12:00 - 13:00 400 MW

07-10-2026 13:00 - 14:00 400 MW

07-10-2026 14:00 - 15:00 400 MW

5. Amount of LTTR remaining after curtailment:

07-10-2026 10:00 - 11:00 39 MW

07-10-2026 11:00 - 12:00 39 MW

07-10-2026 12:00 - 13:00 39 MW

07-10-2026 13:00 - 14:00 39 MW

07-10-2026 14:00 - 15:00 39 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. 

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

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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Frequently asked questions

Check out the common questions and our answers on how to use the auction platform.

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Do you need support?

If you can't find an answer to your question, our team is here to help!

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