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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-IT border for delivery period 25-09-2026

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:

25-09-2026 00:00 - 01:00 227 MW

25-09-2026 01:00 - 02:00 227 MW

25-09-2026 02:00 - 03:00 227 MW

25-09-2026 18:00 - 19:00 227 MW

25-09-2026 19:00 - 20:00 227 MW

25-09-2026 20:00 - 21:00 227 MW

25-09-2026 21:00 - 22:00 227 MW

25-09-2026 22:00 - 23:00 227 MW

25-09-2026 23:00 - 24:00 227 MW

5. Amount of LTTR remaining after curtailment:

25-09-2026 00:00 - 01:00 177 MW

25-09-2026 01:00 - 02:00 177 MW

25-09-2026 02:00 - 03:00 177 MW

25-09-2026 18:00 - 19:00 184 MW

25-09-2026 19:00 - 20:00 184 MW

25-09-2026 20:00 - 21:00 184 MW

25-09-2026 21:00 - 22:00 184 MW

25-09-2026 22:00 - 23:00 184 MW

25-09-2026 23:00 - 24:00 165 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 AT-IT border for delivery period 25-09-2026

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

AT-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

25-09-2026 18:00 - 19:00 202 MW

25-09-2026 19:00 - 20:00 202 MW

25-09-2026 20:00 - 21:00 202 MW

5. Amount of LTTR remaining after curtailment:

25-09-2026 18:00 - 19:00 154 MW

25-09-2026 19:00 - 20:00 154 MW

25-09-2026 20:00 - 21:00 154 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

Update : Temporary Unavailability of Auction Data - RESOLVED

by JAO

Please be informed the Auction data page on JAO website is available again. We are still investigating the root cause.

Capacity Curtailment on the ES-FR border for delivery period 25-09-2026

by JAO

1. TSO(s)*:

RTE-TSO

2. Identification of affected Long Term Transmission Rights:

ES-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

25-09-2026 20:00 - 21:00 1119 MW

25-09-2026 21:00 - 22:00 1119 MW

5. Amount of LTTR remaining after curtailment:

25-09-2026 20:00 - 21:00 948 MW

25-09-2026 21:00 - 22:00 1057 MW

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

   25/09/2026

      20:00-21:00 Network Security

      21:00-22:00 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

Capacity Curtailment on the GR-BG border for delivery period 26-09-2026

by JAO

1. TSO(s)*:

HTSO-TSO

2. Identification of affected Long Term Transmission Rights:

GR-BG

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

26-09-2026 06:00 - 07:00 689 MW

26-09-2026 07:00 - 08:00 689 MW

26-09-2026 08:00 - 09:00 689 MW

26-09-2026 09:00 - 10:00 689 MW

26-09-2026 10:00 - 11:00 689 MW

26-09-2026 11:00 - 12:00 689 MW

26-09-2026 12:00 - 13:00 689 MW

26-09-2026 13:00 - 14:00 689 MW

26-09-2026 14:00 - 15:00 689 MW

26-09-2026 15:00 - 16:00 689 MW

5. Amount of LTTR remaining after curtailment:

26-09-2026 06:00 - 07:00 525 MW

26-09-2026 07:00 - 08:00 525 MW

26-09-2026 08:00 - 09:00 525 MW

26-09-2026 09:00 - 10:00 525 MW

26-09-2026 10:00 - 11:00 525 MW

26-09-2026 11:00 - 12:00 525 MW

26-09-2026 12:00 - 13:00 525 MW

26-09-2026 13:00 - 14:00 525 MW

26-09-2026 14:00 - 15:00 525 MW

26-09-2026 15:00 - 16:00 525 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 GR-BG border for delivery period 25-09-2026

by JAO

1. TSO(s)*:

HTSO-TSO

2. Identification of affected Long Term Transmission Rights:

GR-BG

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

25-09-2026 06:00 - 07:00 689 MW

25-09-2026 07:00 - 08:00 689 MW

25-09-2026 08:00 - 09:00 689 MW

25-09-2026 09:00 - 10:00 689 MW

25-09-2026 10:00 - 11:00 689 MW

25-09-2026 11:00 - 12:00 689 MW

25-09-2026 12:00 - 13:00 689 MW

25-09-2026 13:00 - 14:00 689 MW

25-09-2026 14:00 - 15:00 689 MW

25-09-2026 15:00 - 16:00 689 MW

5. Amount of LTTR remaining after curtailment:

25-09-2026 06:00 - 07:00 525 MW

25-09-2026 07:00 - 08:00 525 MW

25-09-2026 08:00 - 09:00 525 MW

25-09-2026 09:00 - 10:00 525 MW

25-09-2026 10:00 - 11:00 525 MW

25-09-2026 11:00 - 12:00 525 MW

25-09-2026 12:00 - 13:00 525 MW

25-09-2026 13:00 - 14:00 525 MW

25-09-2026 14:00 - 15:00 525 MW

25-09-2026 15:00 - 16:00 525 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.

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.

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.

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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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