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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-FR border for delivery period 04-07-2025

Published: 03/07/2025 | 07:40 by JAO
Capacity Curtailment on the FR-IT border for delivery period 04-07-2025

Published: 03/07/2025 | 07:40 by JAO
Capacity Curtailment on the SI-IT border for delivery period 04-07-2025

Published: 03/07/2025 | 07:38 by JAO
Capacity Curtailment on the IT-SI border for delivery period 04-07-2025

Published: 03/07/2025 | 07:36 by JAO
Capacity Curtailment on the BE-DE border for delivery period 04-07-2025

Published: 03/07/2025 | 07:32 by JAO
Capacity Curtailment on the IT-AT border for delivery period 04-07-2025

Published: 03/07/2025 | 07:32 by JAO
Capacity Curtailment on the DE-BE border for delivery period 04-07-2025

Published: 03/07/2025 | 07:32 by JAO

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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:

04-07-2025 18:00 - 19:00 1870 MW

04-07-2025 19:00 - 20:00 1870 MW

04-07-2025 20:00 - 21:00 1870 MW

04-07-2025 21:00 - 22:00 1870 MW

04-07-2025 22:00 - 23:00 1870 MW

5. Amount of LTTR remaining after curtailment:

04-07-2025 18:00 - 19:00 1302 MW

04-07-2025 19:00 - 20:00 611 MW

04-07-2025 20:00 - 21:00 611 MW

04-07-2025 21:00 - 22:00 611 MW

04-07-2025 22:00 - 23:00 1296 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

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:

04-07-2025 12:00 - 13:00 2120 MW

04-07-2025 13:00 - 14:00 2120 MW

04-07-2025 14:00 - 15:00 2120 MW

5. Amount of LTTR remaining after curtailment:

04-07-2025 12:00 - 13:00 1949 MW

04-07-2025 13:00 - 14:00 1949 MW

04-07-2025 14:00 - 15:00 1949 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

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:

04-07-2025 18:00 - 19:00 248 MW

04-07-2025 23:00 - 24:00 248 MW

5. Amount of LTTR remaining after curtailment:

04-07-2025 18:00 - 19:00 207 MW

04-07-2025 23:00 - 24:00 214 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

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:

04-07-2025 19:00 - 20:00 315 MW

04-07-2025 20:00 - 21:00 315 MW

04-07-2025 21:00 - 22:00 315 MW

5. Amount of LTTR remaining after curtailment:

04-07-2025 19:00 - 20:00 194 MW

04-07-2025 20:00 - 21:00 194 MW

04-07-2025 21:00 - 22:00 194 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

1. TSO(s)*:

Amprion, Elia

2. Identification of affected Long Term Transmission Rights:

BE-DE

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

04-07-2025 00:00 - 01:00 399 MW

04-07-2025 01:00 - 02:00 399 MW

04-07-2025 02:00 - 03:00 399 MW

04-07-2025 03:00 - 04:00 399 MW

04-07-2025 04:00 - 05:00 399 MW

04-07-2025 05:00 - 06:00 399 MW

04-07-2025 06:00 - 07:00 399 MW

04-07-2025 07:00 - 08:00 399 MW

04-07-2025 08:00 - 09:00 399 MW

04-07-2025 09:00 - 10:00 399 MW

04-07-2025 10:00 - 11:00 399 MW

04-07-2025 11:00 - 12:00 399 MW

04-07-2025 12:00 - 13:00 399 MW

04-07-2025 13:00 - 14:00 399 MW

04-07-2025 14:00 - 15:00 399 MW

04-07-2025 15:00 - 16:00 399 MW

04-07-2025 16:00 - 17:00 399 MW

04-07-2025 17:00 - 18:00 399 MW

04-07-2025 18:00 - 19:00 399 MW

04-07-2025 19:00 - 20:00 399 MW

04-07-2025 20:00 - 21:00 399 MW

04-07-2025 21:00 - 22:00 399 MW

04-07-2025 22:00 - 23:00 399 MW

04-07-2025 23:00 - 24:00 399 MW

5. Amount of LTTR remaining after curtailment:

04-07-2025 00:00 - 01:00 0 MW

04-07-2025 01:00 - 02:00 0 MW

04-07-2025 02:00 - 03:00 0 MW

04-07-2025 03:00 - 04:00 0 MW

04-07-2025 04:00 - 05:00 0 MW

04-07-2025 05:00 - 06:00 0 MW

04-07-2025 06:00 - 07:00 0 MW

04-07-2025 07:00 - 08:00 0 MW

04-07-2025 08:00 - 09:00 0 MW

04-07-2025 09:00 - 10:00 0 MW

04-07-2025 10:00 - 11:00 0 MW

04-07-2025 11:00 - 12:00 0 MW

04-07-2025 12:00 - 13:00 0 MW

04-07-2025 13:00 - 14:00 0 MW

04-07-2025 14:00 - 15:00 0 MW

04-07-2025 15:00 - 16:00 0 MW

04-07-2025 16:00 - 17:00 0 MW

04-07-2025 17:00 - 18:00 0 MW

04-07-2025 18:00 - 19:00 0 MW

04-07-2025 19:00 - 20:00 0 MW

04-07-2025 20:00 - 21:00 0 MW

04-07-2025 21:00 - 22:00 0 MW

04-07-2025 22:00 - 23:00 0 MW

04-07-2025 23:00 - 24:00 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)*?

Reason for this curtailment is a forced outage on the ALEGrO DC interconnector which is the only tie-line between Belgian and German bidding zones.

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:

04-07-2025 19:00 - 20:00 79 MW

04-07-2025 20:00 - 21:00 79 MW

04-07-2025 21:00 - 22:00 79 MW

5. Amount of LTTR remaining after curtailment:

04-07-2025 19:00 - 20:00 43 MW

04-07-2025 20:00 - 21:00 43 MW

04-07-2025 21:00 - 22:00 43 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

1. TSO(s)*:

Amprion, Elia

2. Identification of affected Long Term Transmission Rights:

DE-BE

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

04-07-2025 00:00 - 01:00 400 MW

04-07-2025 01:00 - 02:00 400 MW

04-07-2025 02:00 - 03:00 400 MW

04-07-2025 03:00 - 04:00 400 MW

04-07-2025 04:00 - 05:00 400 MW

04-07-2025 05:00 - 06:00 400 MW

04-07-2025 06:00 - 07:00 400 MW

04-07-2025 07:00 - 08:00 400 MW

04-07-2025 08:00 - 09:00 400 MW

04-07-2025 09:00 - 10:00 400 MW

04-07-2025 10:00 - 11:00 400 MW

04-07-2025 11:00 - 12:00 400 MW

04-07-2025 12:00 - 13:00 400 MW

04-07-2025 13:00 - 14:00 400 MW

04-07-2025 14:00 - 15:00 400 MW

04-07-2025 15:00 - 16:00 400 MW

04-07-2025 16:00 - 17:00 400 MW

04-07-2025 17:00 - 18:00 400 MW

04-07-2025 18:00 - 19:00 400 MW

04-07-2025 19:00 - 20:00 400 MW

04-07-2025 20:00 - 21:00 400 MW

04-07-2025 21:00 - 22:00 400 MW

04-07-2025 22:00 - 23:00 400 MW

04-07-2025 23:00 - 24:00 400 MW

5. Amount of LTTR remaining after curtailment:

04-07-2025 00:00 - 01:00 0 MW

04-07-2025 01:00 - 02:00 0 MW

04-07-2025 02:00 - 03:00 0 MW

04-07-2025 03:00 - 04:00 0 MW

04-07-2025 04:00 - 05:00 0 MW

04-07-2025 05:00 - 06:00 0 MW

04-07-2025 06:00 - 07:00 0 MW

04-07-2025 07:00 - 08:00 0 MW

04-07-2025 08:00 - 09:00 0 MW

04-07-2025 09:00 - 10:00 0 MW

04-07-2025 10:00 - 11:00 0 MW

04-07-2025 11:00 - 12:00 0 MW

04-07-2025 12:00 - 13:00 0 MW

04-07-2025 13:00 - 14:00 0 MW

04-07-2025 14:00 - 15:00 0 MW

04-07-2025 15:00 - 16:00 0 MW

04-07-2025 16:00 - 17:00 0 MW

04-07-2025 17:00 - 18:00 0 MW

04-07-2025 18:00 - 19:00 0 MW

04-07-2025 19:00 - 20:00 0 MW

04-07-2025 20:00 - 21:00 0 MW

04-07-2025 21:00 - 22:00 0 MW

04-07-2025 22:00 - 23:00 0 MW

04-07-2025 23:00 - 24:00 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)*?

Reason for this curtailment is a forced outage on the ALEGrO DC interconnector which is the only tie-line between Belgian and German bidding zones.

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.

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