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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.

 

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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

Capacity Curtailment on the AT-DE border for delivery period 18-04-2026

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:

18-04-2026 09:00 - 10:00 3620 MW

18-04-2026 10:00 - 11:00 3620 MW

18-04-2026 11:00 - 12:00 3620 MW

18-04-2026 12:00 - 13:00 3620 MW

18-04-2026 13:00 - 14:00 3620 MW

18-04-2026 14:00 - 15:00 3620 MW

18-04-2026 15:00 - 16:00 3620 MW

5. Amount of LTTR remaining after curtailment:

18-04-2026 09:00 - 10:00 2080 MW

18-04-2026 10:00 - 11:00 2328 MW

18-04-2026 11:00 - 12:00 2530 MW

18-04-2026 12:00 - 13:00 2898 MW

18-04-2026 13:00 - 14:00 2943 MW

18-04-2026 14:00 - 15:00 2962 MW

18-04-2026 15:00 - 16:00 2992 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 18-04-2026

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:

18-04-2026 09:00 - 10:00 350 MW

18-04-2026 10:00 - 11:00 350 MW

18-04-2026 11:00 - 12:00 350 MW

18-04-2026 12:00 - 13:00 350 MW

18-04-2026 13:00 - 14:00 350 MW

18-04-2026 14:00 - 15:00 350 MW

18-04-2026 15:00 - 16:00 350 MW

5. Amount of LTTR remaining after curtailment:

18-04-2026 09:00 - 10:00 186 MW

18-04-2026 10:00 - 11:00 209 MW

18-04-2026 11:00 - 12:00 224 MW

18-04-2026 12:00 - 13:00 236 MW

18-04-2026 13:00 - 14:00 239 MW

18-04-2026 14:00 - 15:00 241 MW

18-04-2026 15:00 - 16:00 253 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 CH-IT border for delivery period 18-04-2026

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:

18-04-2026 11:00 - 12:00 311 MW

18-04-2026 12:00 - 13:00 311 MW

18-04-2026 13:00 - 14:00 311 MW

18-04-2026 14:00 - 15:00 311 MW

18-04-2026 15:00 - 16:00 311 MW

5. Amount of LTTR remaining after curtailment:

18-04-2026 11:00 - 12:00 0 MW

18-04-2026 12:00 - 13:00 0 MW

18-04-2026 13:00 - 14:00 0 MW

18-04-2026 14:00 - 15:00 0 MW

18-04-2026 15:00 - 16:00 0 MW

Capacity Curtailment on the SI-AT border for delivery period 18-04-2026

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:

18-04-2026 09:00 - 10:00 370 MW

18-04-2026 10:00 - 11:00 370 MW

18-04-2026 11:00 - 12:00 370 MW

18-04-2026 12:00 - 13:00 370 MW

18-04-2026 13:00 - 14:00 370 MW

18-04-2026 14:00 - 15:00 370 MW

18-04-2026 15:00 - 16:00 370 MW

5. Amount of LTTR remaining after curtailment:

18-04-2026 09:00 - 10:00 121 MW

18-04-2026 10:00 - 11:00 112 MW

18-04-2026 11:00 - 12:00 95 MW

18-04-2026 12:00 - 13:00 93 MW

18-04-2026 13:00 - 14:00 90 MW

18-04-2026 14:00 - 15:00 93 MW

18-04-2026 15:00 - 16:00 104 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 18-04-2026

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:

18-04-2026 09:00 - 10:00 295 MW

18-04-2026 10:00 - 11:00 295 MW

18-04-2026 11:00 - 12:00 295 MW

18-04-2026 12:00 - 13:00 295 MW

18-04-2026 13:00 - 14:00 295 MW

18-04-2026 14:00 - 15:00 295 MW

18-04-2026 15:00 - 16:00 295 MW

5. Amount of LTTR remaining after curtailment:

18-04-2026 09:00 - 10:00 215 MW

18-04-2026 10:00 - 11:00 191 MW

18-04-2026 11:00 - 12:00 173 MW

18-04-2026 12:00 - 13:00 173 MW

18-04-2026 13:00 - 14:00 152 MW

18-04-2026 14:00 - 15:00 156 MW

18-04-2026 15:00 - 16:00 190 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 BG-GR border for delivery period 18-04-2026

by JAO

1. TSO(s)*:

HTSO-TSO

2. Identification of affected Long Term Transmission Rights:

BG-GR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

18-04-2026 06:00 - 07:00 800 MW

18-04-2026 07:00 - 08:00 800 MW

18-04-2026 08:00 - 09:00 800 MW

18-04-2026 09:00 - 10:00 800 MW

18-04-2026 10:00 - 11:00 800 MW

18-04-2026 11:00 - 12:00 800 MW

18-04-2026 12:00 - 13:00 800 MW

18-04-2026 13:00 - 14:00 800 MW

18-04-2026 14:00 - 15:00 800 MW

5. Amount of LTTR remaining after curtailment:

18-04-2026 06:00 - 07:00 483 MW

18-04-2026 07:00 - 08:00 483 MW

18-04-2026 08:00 - 09:00 483 MW

18-04-2026 09:00 - 10:00 483 MW

18-04-2026 10:00 - 11:00 483 MW

18-04-2026 11:00 - 12:00 483 MW

18-04-2026 12:00 - 13:00 483 MW

18-04-2026 13:00 - 14:00 483 MW

18-04-2026 14:00 - 15:00 483 MW

6. Information on exact operational security limit(s) that are expected to be violated in the absence of curtailment*:

Operational security reasons.

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 18-04-2026

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:

18-04-2026 11:00 - 12:00 72 MW

18-04-2026 12:00 - 13:00 72 MW

18-04-2026 13:00 - 14:00 72 MW

18-04-2026 14:00 - 15:00 72 MW

18-04-2026 15:00 - 16:00 72 MW

5. Amount of LTTR remaining after curtailment:

18-04-2026 11:00 - 12:00 3 MW

18-04-2026 12:00 - 13:00 3 MW

18-04-2026 13:00 - 14:00 3 MW

18-04-2026 14:00 - 15:00 3 MW

18-04-2026 15:00 - 16:00 3 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

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.

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JAO workers

Frequently asked questions

Check out the common questions and our answers on how to use the auction platform.

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