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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 CH-IT border for delivery period 17-05-2026

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:

17-05-2026 09:00 - 10:00 282 MW

17-05-2026 10:00 - 11:00 282 MW

17-05-2026 11:00 - 12:00 282 MW

17-05-2026 12:00 - 13:00 282 MW

17-05-2026 13:00 - 14:00 282 MW

17-05-2026 14:00 - 15:00 282 MW

17-05-2026 15:00 - 16:00 282 MW

5. Amount of LTTR remaining after curtailment:

17-05-2026 09:00 - 10:00 0 MW

17-05-2026 10:00 - 11:00 0 MW

17-05-2026 11:00 - 12:00 0 MW

17-05-2026 12:00 - 13:00 0 MW

17-05-2026 13:00 - 14:00 0 MW

17-05-2026 14:00 - 15:00 0 MW

17-05-2026 15:00 - 16:00 0 MW

Capacity Curtailment on the SI-AT border for delivery period 17-05-2026

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:

17-05-2026 10:00 - 11:00 370 MW

17-05-2026 11:00 - 12:00 370 MW

17-05-2026 12:00 - 13:00 370 MW

17-05-2026 13:00 - 14:00 370 MW

5. Amount of LTTR remaining after curtailment:

17-05-2026 10:00 - 11:00 231 MW

17-05-2026 11:00 - 12:00 250 MW

17-05-2026 12:00 - 13:00 254 MW

17-05-2026 13:00 - 14:00 254 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.

*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 HU-AT border for delivery period 17-05-2026

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:

17-05-2026 10:00 - 11:00 295 MW

17-05-2026 11:00 - 12:00 295 MW

17-05-2026 12:00 - 13:00 295 MW

17-05-2026 13:00 - 14:00 295 MW

5. Amount of LTTR remaining after curtailment:

17-05-2026 10:00 - 11:00 188 MW

17-05-2026 11:00 - 12:00 182 MW

17-05-2026 12:00 - 13:00 182 MW

17-05-2026 13:00 - 14:00 182 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 CCC in the calculation.

*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-CZ border for delivery period 17-05-2026

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:

17-05-2026 10:00 - 11:00 350 MW

17-05-2026 11:00 - 12:00 350 MW

17-05-2026 12:00 - 13:00 350 MW

17-05-2026 13:00 - 14:00 350 MW

5. Amount of LTTR remaining after curtailment:

17-05-2026 10:00 - 11:00 141 MW

17-05-2026 11:00 - 12:00 151 MW

17-05-2026 12:00 - 13:00 154 MW

17-05-2026 13:00 - 14:00 169 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.

*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-DE border for delivery period 17-05-2026

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:

17-05-2026 10:00 - 11:00 3620 MW

17-05-2026 11:00 - 12:00 3620 MW

5. Amount of LTTR remaining after curtailment:

17-05-2026 10:00 - 11:00 3451 MW

17-05-2026 11:00 - 12:00 3471 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.

*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 SI-IT border for delivery period 17-05-2026

by JAO

1. TSO(s)*:

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:

17-05-2026 08:00 - 09:00 59 MW

17-05-2026 09:00 - 10:00 59 MW

17-05-2026 10:00 - 11:00 59 MW

17-05-2026 11:00 - 12:00 59 MW

17-05-2026 12:00 - 13:00 59 MW

17-05-2026 13:00 - 14:00 59 MW

17-05-2026 14:00 - 15:00 59 MW

17-05-2026 15:00 - 16:00 59 MW

5. Amount of LTTR remaining after curtailment:

17-05-2026 08:00 - 09:00 32 MW

17-05-2026 09:00 - 10:00 0 MW

17-05-2026 10:00 - 11:00 0 MW

17-05-2026 11:00 - 12:00 0 MW

17-05-2026 12:00 - 13:00 0 MW

17-05-2026 13:00 - 14:00 0 MW

17-05-2026 14:00 - 15:00 0 MW

17-05-2026 15:00 - 16:00 0 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 FR-IT border for delivery period 17-05-2026

by JAO

1. TSO(s)*:

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:

17-05-2026 09:00 - 10:00 451 MW

17-05-2026 10:00 - 11:00 451 MW

17-05-2026 11:00 - 12:00 451 MW

17-05-2026 12:00 - 13:00 451 MW

17-05-2026 13:00 - 14:00 451 MW

17-05-2026 14:00 - 15:00 451 MW

17-05-2026 15:00 - 16:00 451 MW

5. Amount of LTTR remaining after curtailment:

17-05-2026 09:00 - 10:00 0 MW

17-05-2026 10:00 - 11:00 0 MW

17-05-2026 11:00 - 12:00 0 MW

17-05-2026 12:00 - 13:00 0 MW

17-05-2026 13:00 - 14:00 0 MW

17-05-2026 14:00 - 15:00 0 MW

17-05-2026 15:00 - 16:00 0 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

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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Do you need support?

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

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