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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 SI-AT border for delivery period 29-09-2026

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:

29-09-2026 08:00 - 09:00 310 MW

29-09-2026 09:00 - 10:00 310 MW

29-09-2026 10:00 - 11:00 310 MW

29-09-2026 11:00 - 12:00 310 MW

29-09-2026 12:00 - 13:00 310 MW

29-09-2026 13:00 - 14:00 310 MW

29-09-2026 14:00 - 15:00 310 MW

29-09-2026 15:00 - 16:00 310 MW

5. Amount of LTTR remaining after curtailment:

29-09-2026 08:00 - 09:00 233 MW

29-09-2026 09:00 - 10:00 216 MW

29-09-2026 10:00 - 11:00 140 MW

29-09-2026 11:00 - 12:00 183 MW

29-09-2026 12:00 - 13:00 171 MW

29-09-2026 13:00 - 14:00 186 MW

29-09-2026 14:00 - 15:00 186 MW

29-09-2026 15:00 - 16:00 192 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 29-09-2026

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:

29-09-2026 10:00 - 11:00 260 MW

5. Amount of LTTR remaining after curtailment:

29-09-2026 10:00 - 11:00 214 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 29-09-2026

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:

29-09-2026 08:00 - 09:00 350 MW

29-09-2026 09:00 - 10:00 350 MW

29-09-2026 10:00 - 11:00 350 MW

29-09-2026 11:00 - 12:00 350 MW

29-09-2026 12:00 - 13:00 350 MW

29-09-2026 13:00 - 14:00 350 MW

29-09-2026 14:00 - 15:00 350 MW

29-09-2026 15:00 - 16:00 350 MW

5. Amount of LTTR remaining after curtailment:

29-09-2026 08:00 - 09:00 94 MW

29-09-2026 09:00 - 10:00 135 MW

29-09-2026 10:00 - 11:00 41 MW

29-09-2026 11:00 - 12:00 114 MW

29-09-2026 12:00 - 13:00 113 MW

29-09-2026 13:00 - 14:00 117 MW

29-09-2026 14:00 - 15:00 114 MW

29-09-2026 15:00 - 16:00 138 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-DE border for delivery period 29-09-2026

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:

29-09-2026 08:00 - 09:00 3819 MW

29-09-2026 09:00 - 10:00 3819 MW

29-09-2026 10:00 - 11:00 3819 MW

29-09-2026 11:00 - 12:00 3819 MW

29-09-2026 12:00 - 13:00 3819 MW

29-09-2026 13:00 - 14:00 3819 MW

29-09-2026 14:00 - 15:00 3819 MW

29-09-2026 15:00 - 16:00 3819 MW

5. Amount of LTTR remaining after curtailment:

29-09-2026 08:00 - 09:00 973 MW

29-09-2026 09:00 - 10:00 1152 MW

29-09-2026 10:00 - 11:00 689 MW

29-09-2026 11:00 - 12:00 1029 MW

29-09-2026 12:00 - 13:00 1019 MW

29-09-2026 13:00 - 14:00 1040 MW

29-09-2026 14:00 - 15:00 1026 MW

29-09-2026 15:00 - 16:00 1260 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.

RESOLVED : Temporary Unavailability of Auction Data

by JAO

We are pleased to inform you that our availability of Auction Data services are available again, as the issue has been successfully resolved.

Temporary Unavailability of Auction Data

by JAO

Please be informed that auction data on our website is currently temporarily unavailable due to technical reasons.

We are working to restore the service as soon as possible and will keep you informed of any developments. Further information will be shared as soon as it becomes available.

We apologize for any inconvenience this may cause and thank you for your understanding.

Capacity Curtailment on the FR-ES border for delivery period 29-09-2026

by JAO

1. TSO(s)*:

RTE-TSO, REE

2. Identification of affected Long Term Transmission Rights:

FR-ES

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

29-09-2026 04:00 - 05:00 2149 MW

29-09-2026 05:00 - 06:00 2149 MW

29-09-2026 18:00 - 19:00 2149 MW

29-09-2026 19:00 - 20:00 2149 MW

29-09-2026 20:00 - 21:00 2149 MW

29-09-2026 21:00 - 22:00 2149 MW

29-09-2026 22:00 - 23:00 2149 MW

29-09-2026 23:00 - 24:00 2149 MW

5. Amount of LTTR remaining after curtailment:

29-09-2026 04:00 - 05:00 1961 MW

29-09-2026 05:00 - 06:00 1961 MW

29-09-2026 18:00 - 19:00 1417 MW

29-09-2026 19:00 - 20:00 1417 MW

29-09-2026 20:00 - 21:00 1417 MW

29-09-2026 21:00 - 22:00 1417 MW

29-09-2026 22:00 - 23:00 1417 MW

29-09-2026 23:00 - 24:00 1417 MW

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

29/09/2026

      04:00-05:00 Network Security

      05:00-06:00 Network Security

      18:00-19:00 Network Security

      19:00-20:00 Network Security

      20:00-21:00 Network Security

      21:00-22:00 Network Security

      22:00-23:00 Network Security

      23:00-24:00 Network Security

7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s)*?

The available remedial actions were assessed as insufficient or ineffective to avoid the violation of operational security limits

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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