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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 AT-DE border for delivery period 25-06-2026

by JAO

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:

25-06-2026 08:00 - 09:00 3620 MW

25-06-2026 09:00 - 10:00 3620 MW

25-06-2026 10:00 - 11:00 3620 MW

25-06-2026 11:00 - 12:00 3620 MW

25-06-2026 12:00 - 13:00 3620 MW

25-06-2026 13:00 - 14:00 3620 MW

25-06-2026 14:00 - 15:00 3620 MW

25-06-2026 15:00 - 16:00 3620 MW

5. Amount of LTTR remaining after curtailment:

25-06-2026 08:00 - 09:00 850 MW

25-06-2026 09:00 - 10:00 1484 MW

25-06-2026 10:00 - 11:00 1301 MW

25-06-2026 11:00 - 12:00 1479 MW

25-06-2026 12:00 - 13:00 1849 MW

25-06-2026 13:00 - 14:00 1475 MW

25-06-2026 14:00 - 15:00 1530 MW

25-06-2026 15:00 - 16:00 1863 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 AT-CZ border for delivery period 25-06-2026

by JAO

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:

25-06-2026 08:00 - 09:00 350 MW

25-06-2026 09:00 - 10:00 350 MW

25-06-2026 10:00 - 11:00 350 MW

25-06-2026 11:00 - 12:00 350 MW

25-06-2026 12:00 - 13:00 350 MW

25-06-2026 13:00 - 14:00 350 MW

25-06-2026 14:00 - 15:00 350 MW

25-06-2026 15:00 - 16:00 350 MW

5. Amount of LTTR remaining after curtailment:

25-06-2026 08:00 - 09:00 70 MW

25-06-2026 09:00 - 10:00 150 MW

25-06-2026 10:00 - 11:00 132 MW

25-06-2026 11:00 - 12:00 150 MW

25-06-2026 12:00 - 13:00 187 MW

25-06-2026 13:00 - 14:00 150 MW

25-06-2026 14:00 - 15:00 152 MW

25-06-2026 15:00 - 16:00 185 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 HU-AT border for delivery period 25-06-2026

by JAO

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:

25-06-2026 08:00 - 09:00 295 MW

25-06-2026 09:00 - 10:00 295 MW

25-06-2026 10:00 - 11:00 295 MW

25-06-2026 11:00 - 12:00 295 MW

5. Amount of LTTR remaining after curtailment:

25-06-2026 08:00 - 09:00 259 MW

25-06-2026 09:00 - 10:00 259 MW

25-06-2026 10:00 - 11:00 270 MW

25-06-2026 11:00 - 12:00 270 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 SI-AT border for delivery period 21-06-2026

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:

25-06-2026 08:00 - 09:00 345 MW

25-06-2026 09:00 - 10:00 345 MW

25-06-2026 10:00 - 11:00 345 MW

25-06-2026 11:00 - 12:00 345 MW

25-06-2026 12:00 - 13:00 345 MW

25-06-2026 13:00 - 14:00 345 MW

25-06-2026 14:00 - 15:00 345 MW

25-06-2026 15:00 - 16:00 345 MW

5. Amount of LTTR remaining after curtailment:

25-06-2026 08:00 - 09:00 188 MW

25-06-2026 09:00 - 10:00 188 MW

25-06-2026 10:00 - 11:00 165 MW

25-06-2026 11:00 - 12:00 172 MW

25-06-2026 12:00 - 13:00 186 MW

25-06-2026 13:00 - 14:00 188 MW

25-06-2026 14:00 - 15:00 188 MW

25-06-2026 15:00 - 16:00 201 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 SI-IT border for delivery period 25-06-2026

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:

25-06-2026 00:00 - 01:00 203 MW

25-06-2026 01:00 - 02:00 203 MW

25-06-2026 02:00 - 03:00 203 MW

25-06-2026 03:00 - 04:00 203 MW

25-06-2026 04:00 - 05:00 203 MW

25-06-2026 05:00 - 06:00 203 MW

25-06-2026 06:00 - 07:00 203 MW

25-06-2026 23:00 - 24:00 203 MW

5. Amount of LTTR remaining after curtailment:

25-06-2026 00:00 - 01:00 180 MW

25-06-2026 01:00 - 02:00 180 MW

25-06-2026 02:00 - 03:00 180 MW

25-06-2026 03:00 - 04:00 184 MW

25-06-2026 04:00 - 05:00 184 MW

25-06-2026 05:00 - 06:00 184 MW

25-06-2026 06:00 - 07:00 184 MW

25-06-2026 23:00 - 24:00 182 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 CCC1. TSO(s)

Capacity Curtailment on the IT-SI border for delivery period 25-06-2026

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:

25-06-2026 18:00 - 19:00 315 MW

25-06-2026 19:00 - 20:00 315 MW

25-06-2026 20:00 - 21:00 315 MW

25-06-2026 21:00 - 22:00 315 MW

25-06-2026 22:00 - 23:00 315 MW

5. Amount of LTTR remaining after curtailment:

25-06-2026 18:00 - 19:00 0 MW

25-06-2026 19:00 - 20:00 0 MW

25-06-2026 20:00 - 21:00 0 MW

25-06-2026 21:00 - 22:00 0 MW

25-06-2026 22:00 - 23:00 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 CCC1. TSO(s)

Capacity Curtailment on the IT-CH border for delivery period 25-06-2026

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

IT-CH

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

25-06-2026 18:00 - 19:00 720 MW

25-06-2026 19:00 - 20:00 720 MW

25-06-2026 20:00 - 21:00 720 MW

25-06-2026 21:00 - 22:00 720 MW

25-06-2026 22:00 - 23:00 720 MW

5. Amount of LTTR remaining after curtailment:

25-06-2026 18:00 - 19:00 589 MW

25-06-2026 19:00 - 20:00 0 MW

25-06-2026 20:00 - 21:00 0 MW

25-06-2026 21:00 - 22:00 0 MW

25-06-2026 22:00 - 23:00 589 MW

 

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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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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