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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

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Capacity Curtailment on the SI-IT border for delivery period 27-12-2025

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

SI-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

27-12-2025 00:00 - 01:00 185 MW

27-12-2025 01:00 - 02:00 185 MW

27-12-2025 02:00 - 03:00 185 MW

27-12-2025 03:00 - 04:00 185 MW

27-12-2025 04:00 - 05:00 185 MW

27-12-2025 05:00 - 06:00 185 MW

27-12-2025 06:00 - 07:00 185 MW

27-12-2025 07:00 - 08:00 185 MW

27-12-2025 08:00 - 09:00 185 MW

27-12-2025 09:00 - 10:00 185 MW

27-12-2025 10:00 - 11:00 185 MW

27-12-2025 11:00 - 12:00 185 MW

27-12-2025 12:00 - 13:00 185 MW

27-12-2025 13:00 - 14:00 185 MW

27-12-2025 14:00 - 15:00 185 MW

27-12-2025 15:00 - 16:00 185 MW

27-12-2025 16:00 - 17:00 185 MW

27-12-2025 17:00 - 18:00 185 MW

27-12-2025 18:00 - 19:00 185 MW

27-12-2025 19:00 - 20:00 185 MW

27-12-2025 20:00 - 21:00 185 MW

27-12-2025 21:00 - 22:00 185 MW

27-12-2025 22:00 - 23:00 185 MW

27-12-2025 23:00 - 24:00 185 MW

5. Amount of LTTR remaining after curtailment:

27-12-2025 00:00 - 01:00 94 MW

27-12-2025 01:00 - 02:00 109 MW

27-12-2025 02:00 - 03:00 109 MW

27-12-2025 03:00 - 04:00 110 MW

27-12-2025 04:00 - 05:00 116 MW

27-12-2025 05:00 - 06:00 116 MW

27-12-2025 06:00 - 07:00 110 MW

27-12-2025 07:00 - 08:00 123 MW

27-12-2025 08:00 - 09:00 117 MW

27-12-2025 09:00 - 10:00 116 MW

27-12-2025 10:00 - 11:00 115 MW

27-12-2025 11:00 - 12:00 117 MW

27-12-2025 12:00 - 13:00 129 MW

27-12-2025 13:00 - 14:00 125 MW

27-12-2025 14:00 - 15:00 116 MW

27-12-2025 15:00 - 16:00 116 MW

27-12-2025 16:00 - 17:00 116 MW

27-12-2025 17:00 - 18:00 125 MW

27-12-2025 18:00 - 19:00 115 MW

27-12-2025 19:00 - 20:00 108 MW

27-12-2025 20:00 - 21:00 108 MW

27-12-2025 21:00 - 22:00 116 MW

27-12-2025 22:00 - 23:00 116 MW

27-12-2025 23:00 - 24:00 109 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 AT-IT border for delivery period 27-12-2025

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:

27-12-2025 00:00 - 01:00 148 MW

27-12-2025 01:00 - 02:00 148 MW

27-12-2025 02:00 - 03:00 148 MW

27-12-2025 03:00 - 04:00 148 MW

27-12-2025 04:00 - 05:00 148 MW

27-12-2025 05:00 - 06:00 148 MW

27-12-2025 06:00 - 07:00 148 MW

27-12-2025 07:00 - 08:00 148 MW

27-12-2025 08:00 - 09:00 148 MW

27-12-2025 09:00 - 10:00 148 MW

27-12-2025 10:00 - 11:00 148 MW

27-12-2025 11:00 - 12:00 148 MW

27-12-2025 12:00 - 13:00 148 MW

27-12-2025 13:00 - 14:00 148 MW

27-12-2025 14:00 - 15:00 148 MW

27-12-2025 15:00 - 16:00 148 MW

27-12-2025 16:00 - 17:00 148 MW

27-12-2025 17:00 - 18:00 148 MW

27-12-2025 18:00 - 19:00 148 MW

27-12-2025 19:00 - 20:00 148 MW

27-12-2025 20:00 - 21:00 148 MW

27-12-2025 21:00 - 22:00 148 MW

27-12-2025 22:00 - 23:00 148 MW

27-12-2025 23:00 - 24:00 148 MW

5. Amount of LTTR remaining after curtailment:

27-12-2025 00:00 - 01:00 74 MW

27-12-2025 01:00 - 02:00 74 MW

27-12-2025 02:00 - 03:00 74 MW

27-12-2025 03:00 - 04:00 74 MW

27-12-2025 04:00 - 05:00 74 MW

27-12-2025 05:00 - 06:00 74 MW

27-12-2025 06:00 - 07:00 74 MW

27-12-2025 07:00 - 08:00 78 MW

27-12-2025 08:00 - 09:00 78 MW

27-12-2025 09:00 - 10:00 78 MW

27-12-2025 10:00 - 11:00 78 MW

27-12-2025 11:00 - 12:00 78 MW

27-12-2025 12:00 - 13:00 78 MW

27-12-2025 13:00 - 14:00 78 MW

27-12-2025 14:00 - 15:00 78 MW

27-12-2025 15:00 - 16:00 78 MW

27-12-2025 16:00 - 17:00 78 MW

27-12-2025 17:00 - 18:00 78 MW

27-12-2025 18:00 - 19:00 78 MW

27-12-2025 19:00 - 20:00 78 MW

27-12-2025 20:00 - 21:00 78 MW

27-12-2025 21:00 - 22:00 118 MW

27-12-2025 22:00 - 23:00 118 MW

27-12-2025 23:00 - 24:00 121 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 CH-IT border for delivery period 26-12-2025

by JAO

1. TSO(s)*:

SWISSGRID

2. Identification of affected Long Term Transmission Rights:

CH-IT

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:

26-12-2025 18:00 - 19:00 1083 MW

26-12-2025 19:00 - 20:00 1083 MW

26-12-2025 20:00 - 21:00 1083 MW

5. Amount of LTTR remaining after curtailment:

26-12-2025 18:00 - 19:00 1041 MW

26-12-2025 19:00 - 20:00 1041 MW

26-12-2025 20:00 - 21:00 1041 MW

Capacity Curtailment on the SI-IT border for delivery period 26-12-2025

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

SI-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

26-12-2025 00:00 - 01:00 185 MW

26-12-2025 01:00 - 02:00 185 MW

26-12-2025 02:00 - 03:00 185 MW

26-12-2025 03:00 - 04:00 185 MW

26-12-2025 04:00 - 05:00 185 MW

26-12-2025 05:00 - 06:00 185 MW

26-12-2025 06:00 - 07:00 185 MW

26-12-2025 07:00 - 08:00 185 MW

26-12-2025 08:00 - 09:00 185 MW

26-12-2025 09:00 - 10:00 185 MW

26-12-2025 10:00 - 11:00 185 MW

26-12-2025 11:00 - 12:00 185 MW

26-12-2025 12:00 - 13:00 185 MW

26-12-2025 13:00 - 14:00 185 MW

26-12-2025 14:00 - 15:00 185 MW

26-12-2025 15:00 - 16:00 185 MW

26-12-2025 16:00 - 17:00 185 MW

26-12-2025 17:00 - 18:00 185 MW

26-12-2025 21:00 - 22:00 185 MW

26-12-2025 22:00 - 23:00 185 MW

26-12-2025 23:00 - 24:00 185 MW

5. Amount of LTTR remaining after curtailment:

26-12-2025 00:00 - 01:00 87 MW

26-12-2025 01:00 - 02:00 88 MW

26-12-2025 02:00 - 03:00 91 MW

26-12-2025 03:00 - 04:00 91 MW

26-12-2025 04:00 - 05:00 91 MW

26-12-2025 05:00 - 06:00 91 MW

26-12-2025 06:00 - 07:00 88 MW

26-12-2025 07:00 - 08:00 107 MW

26-12-2025 08:00 - 09:00 107 MW

26-12-2025 09:00 - 10:00 79 MW

26-12-2025 10:00 - 11:00 79 MW

26-12-2025 11:00 - 12:00 79 MW

26-12-2025 12:00 - 13:00 88 MW

26-12-2025 13:00 - 14:00 87 MW

26-12-2025 14:00 - 15:00 87 MW

26-12-2025 15:00 - 16:00 87 MW

26-12-2025 16:00 - 17:00 87 MW

26-12-2025 17:00 - 18:00 87 MW

26-12-2025 21:00 - 22:00 79 MW

26-12-2025 22:00 - 23:00 79 MW

26-12-2025 23:00 - 24:00 79 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 FR-IT border for delivery period 26-12-2025

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

FR-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

26-12-2025 18:00 - 19:00 1282 MW

26-12-2025 19:00 - 20:00 1282 MW

26-12-2025 20:00 - 21:00 1282 MW

5. Amount of LTTR remaining after curtailment:

26-12-2025 18:00 - 19:00 1173 MW

26-12-2025 19:00 - 20:00 1173 MW

26-12-2025 20:00 - 21:00 1173 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 AT-IT border for delivery period 26-12-2025

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:

26-12-2025 00:00 - 01:00 204 MW

26-12-2025 01:00 - 02:00 204 MW

26-12-2025 02:00 - 03:00 204 MW

26-12-2025 03:00 - 04:00 204 MW

26-12-2025 04:00 - 05:00 204 MW

26-12-2025 05:00 - 06:00 204 MW

26-12-2025 06:00 - 07:00 204 MW

26-12-2025 07:00 - 08:00 204 MW

26-12-2025 08:00 - 09:00 204 MW

26-12-2025 09:00 - 10:00 204 MW

26-12-2025 10:00 - 11:00 204 MW

26-12-2025 11:00 - 12:00 204 MW

26-12-2025 12:00 - 13:00 204 MW

26-12-2025 13:00 - 14:00 204 MW

26-12-2025 14:00 - 15:00 204 MW

26-12-2025 15:00 - 16:00 204 MW

26-12-2025 16:00 - 17:00 204 MW

26-12-2025 17:00 - 18:00 204 MW

26-12-2025 18:00 - 19:00 204 MW

26-12-2025 19:00 - 20:00 204 MW

26-12-2025 20:00 - 21:00 204 MW

26-12-2025 21:00 - 22:00 204 MW

26-12-2025 22:00 - 23:00 204 MW

26-12-2025 23:00 - 24:00 204 MW

5. Amount of LTTR remaining after curtailment:

26-12-2025 00:00 - 01:00 64 MW

26-12-2025 01:00 - 02:00 64 MW

26-12-2025 02:00 - 03:00 64 MW

26-12-2025 03:00 - 04:00 64 MW

26-12-2025 04:00 - 05:00 64 MW

26-12-2025 05:00 - 06:00 64 MW

26-12-2025 06:00 - 07:00 64 MW

26-12-2025 07:00 - 08:00 64 MW

26-12-2025 08:00 - 09:00 64 MW

26-12-2025 09:00 - 10:00 64 MW

26-12-2025 10:00 - 11:00 64 MW

26-12-2025 11:00 - 12:00 64 MW

26-12-2025 12:00 - 13:00 64 MW

26-12-2025 13:00 - 14:00 64 MW

26-12-2025 14:00 - 15:00 64 MW

26-12-2025 15:00 - 16:00 64 MW

26-12-2025 16:00 - 17:00 64 MW

26-12-2025 17:00 - 18:00 64 MW

26-12-2025 18:00 - 19:00 85 MW

26-12-2025 19:00 - 20:00 85 MW

26-12-2025 20:00 - 21:00 85 MW

26-12-2025 21:00 - 22:00 64 MW

26-12-2025 22:00 - 23:00 64 MW

26-12-2025 23:00 - 24:00 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 CH-IT border for delivery period 25-12-2025

by JAO

1. TSO(s)*:

SWISSGRID

2. Identification of affected Long Term Transmission Rights:

CH-IT

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:

25-12-2025 03:00 - 04:00 1083 MW

25-12-2025 04:00 - 05:00 1083 MW

25-12-2025 05:00 - 06:00 1083 MW

25-12-2025 06:00 - 07:00 1083 MW

25-12-2025 07:00 - 08:00 1083 MW

25-12-2025 10:00 - 11:00 1083 MW

25-12-2025 11:00 - 12:00 1083 MW

25-12-2025 12:00 - 13:00 1083 MW

25-12-2025 13:00 - 14:00 1083 MW

25-12-2025 14:00 - 15:00 1083 MW

25-12-2025 15:00 - 16:00 1083 MW

25-12-2025 16:00 - 17:00 1083 MW

5. Amount of LTTR remaining after curtailment:

25-12-2025 03:00 - 04:00 989 MW

25-12-2025 04:00 - 05:00 946 MW

25-12-2025 05:00 - 06:00 946 MW

25-12-2025 06:00 - 07:00 946 MW

25-12-2025 07:00 - 08:00 1021 MW

25-12-2025 10:00 - 11:00 1021 MW

25-12-2025 11:00 - 12:00 1021 MW

25-12-2025 12:00 - 13:00 1021 MW

25-12-2025 13:00 - 14:00 1021 MW

25-12-2025 14:00 - 15:00 1021 MW

25-12-2025 15:00 - 16:00 1021 MW

25-12-2025 16:00 - 17:00 1021 MW

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. 

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

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