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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 DE-AT border for delivery period 01-10-2026

Published: 30/09/2026 | 08:25 by JAO
Capacity Curtailment on the AT-DE border for delivery period 01-10-2026

Published: 30/09/2026 | 07:57 by JAO
Capacity Curtailment on the SI-AT border for delivery period 01-10-2026

Published: 30/09/2026 | 07:43 by JAO
Capacity Curtailment on the AT-CZ border for delivery period 01-10-2026

Published: 30/09/2026 | 07:37 by JAO
Capacity Curtailment on the HU-AT border for delivery period 01-10-2026

Published: 30/09/2026 | 07:35 by JAO
Capacity Curtailment on the IT-CH border for delivery period 01-10-2026

Published: 30/09/2026 | 07:24 by JAO
Capacity Curtailment on the IT-FR border for delivery period 01-10-2026

Published: 30/09/2026 | 07:23 by JAO

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1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

DE-AT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

01-10-2026 17:00 - 18:00 4820 MW

01-10-2026 18:00 - 19:00 4820 MW

5. Amount of LTTR remaining after curtailment:

01-10-2026 17:00 - 18:00 4254 MW

01-10-2026 18:00 - 19:00 4657 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.

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

AT-DE

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

01-10-2026 09:00 - 10:00 4419 MW

01-10-2026 10:00 - 11:00 4419 MW

01-10-2026 11:00 - 12:00 4419 MW

01-10-2026 12:00 - 13:00 4419 MW

01-10-2026 13:00 - 14:00 4419 MW

01-10-2026 14:00 - 15:00 4419 MW

5. Amount of LTTR remaining after curtailment:

01-10-2026 09:00 - 10:00 1077 MW

01-10-2026 10:00 - 11:00 1076 MW

01-10-2026 11:00 - 12:00 1385 MW

01-10-2026 12:00 - 13:00 1326 MW

01-10-2026 13:00 - 14:00 1318 MW

01-10-2026 14:00 - 15:00 1364 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.

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:

01-10-2026 09:00 - 10:00 400 MW

01-10-2026 10:00 - 11:00 400 MW

01-10-2026 11:00 - 12:00 400 MW

01-10-2026 12:00 - 13:00 400 MW

01-10-2026 13:00 - 14:00 400 MW

01-10-2026 14:00 - 15:00 400 MW

5. Amount of LTTR remaining after curtailment:

01-10-2026 09:00 - 10:00 192 MW

01-10-2026 10:00 - 11:00 196 MW

01-10-2026 11:00 - 12:00 232 MW

01-10-2026 12:00 - 13:00 177 MW

01-10-2026 13:00 - 14:00 178 MW

01-10-2026 14:00 - 15:00 212 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.

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

AT-CZ

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

01-10-2026 09:00 - 10:00 350 MW

01-10-2026 10:00 - 11:00 350 MW

01-10-2026 11:00 - 12:00 350 MW

01-10-2026 12:00 - 13:00 350 MW

01-10-2026 13:00 - 14:00 350 MW

01-10-2026 14:00 - 15:00 350 MW

5. Amount of LTTR remaining after curtailment:

01-10-2026 09:00 - 10:00 81 MW

01-10-2026 10:00 - 11:00 81 MW

01-10-2026 11:00 - 12:00 98 MW

01-10-2026 12:00 - 13:00 81 MW

01-10-2026 13:00 - 14:00 81 MW

01-10-2026 14:00 - 15:00 98 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.

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

HU-AT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

01-10-2026 09:00 - 10:00 320 MW

01-10-2026 10:00 - 11:00 320 MW

01-10-2026 11:00 - 12:00 320 MW

01-10-2026 12:00 - 13:00 320 MW

01-10-2026 13:00 - 14:00 320 MW

01-10-2026 14:00 - 15:00 320 MW

5. Amount of LTTR remaining after curtailment:

01-10-2026 09:00 - 10:00 217 MW

01-10-2026 10:00 - 11:00 217 MW

01-10-2026 11:00 - 12:00 190 MW

01-10-2026 12:00 - 13:00 137 MW

01-10-2026 13:00 - 14:00 250 MW

01-10-2026 14:00 - 15:00 265 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.

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:

01-10-2026 17:00 - 18:00 925 MW

01-10-2026 18:00 - 19:00 925 MW

01-10-2026 19:00 - 20:00 925 MW

01-10-2026 20:00 - 21:00 925 MW

01-10-2026 21:00 - 22:00 925 MW

01-10-2026 22:00 - 23:00 925 MW

5. Amount of LTTR remaining after curtailment:

01-10-2026 17:00 - 18:00 590 MW

01-10-2026 18:00 - 19:00 0 MW

01-10-2026 19:00 - 20:00 0 MW

01-10-2026 20:00 - 21:00 0 MW

01-10-2026 21:00 - 22:00 0 MW

01-10-2026 22:00 - 23:00 590 MW

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:

01-10-2026 16:00 - 17:00 1495 MW

01-10-2026 17:00 - 18:00 1495 MW

01-10-2026 18:00 - 19:00 1495 MW

01-10-2026 19:00 - 20:00 1495 MW

01-10-2026 20:00 - 21:00 1495 MW

01-10-2026 21:00 - 22:00 1495 MW

01-10-2026 22:00 - 23:00 1495 MW

01-10-2026 23:00 - 24:00 1495 MW

5. Amount of LTTR remaining after curtailment:

01-10-2026 16:00 - 17:00 1371 MW

01-10-2026 17:00 - 18:00 680 MW

01-10-2026 18:00 - 19:00 0 MW

01-10-2026 19:00 - 20:00 0 MW

01-10-2026 20:00 - 21:00 0 MW

01-10-2026 21:00 - 22:00 0 MW

01-10-2026 22:00 - 23:00 680 MW

01-10-2026 23:00 - 24:00 1372 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.

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.

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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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