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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 FR-CH border for delivery period 21-09-2026

by JAO

1. TSO(s)*:

RTE-TSO

2. Identification of affected Long Term Transmission Rights:

FR-CH

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

21-09-2026 07:00 - 08:00 370 MW

21-09-2026 08:00 - 09:00 370 MW

21-09-2026 09:00 - 10:00 370 MW

21-09-2026 10:00 - 11:00 370 MW

21-09-2026 11:00 - 12:00 370 MW

21-09-2026 12:00 - 13:00 370 MW

21-09-2026 13:00 - 14:00 370 MW

21-09-2026 14:00 - 15:00 370 MW

21-09-2026 15:00 - 16:00 370 MW

21-09-2026 16:00 - 17:00 370 MW

21-09-2026 17:00 - 18:00 370 MW

21-09-2026 18:00 - 19:00 370 MW

21-09-2026 19:00 - 20:00 370 MW

21-09-2026 20:00 - 21:00 370 MW

21-09-2026 21:00 - 22:00 370 MW

21-09-2026 22:00 - 23:00 370 MW

21-09-2026 23:00 - 24:00 370 MW

5. Amount of LTTR remaining after curtailment:

21-09-2026 07:00 - 08:00 0 MW

21-09-2026 08:00 - 09:00 0 MW

21-09-2026 09:00 - 10:00 0 MW

21-09-2026 10:00 - 11:00 0 MW

21-09-2026 11:00 - 12:00 0 MW

21-09-2026 12:00 - 13:00 0 MW

21-09-2026 13:00 - 14:00 0 MW

21-09-2026 14:00 - 15:00 0 MW

21-09-2026 15:00 - 16:00 0 MW

21-09-2026 16:00 - 17:00 0 MW

21-09-2026 17:00 - 18:00 0 MW

21-09-2026 18:00 - 19:00 0 MW

21-09-2026 19:00 - 20:00 0 MW

21-09-2026 20:00 - 21:00 0 MW

21-09-2026 21:00 - 22:00 0 MW

21-09-2026 22:00 - 23:00 0 MW

21-09-2026 23:00 - 24:00 0 MW

6. Information on exact operational limit(s) that are expected to be violated in the absence of curtailment :
   21/09/2026
      07:00-08:00 Network Security
      08:00-09:00 Network Security
      09:00-10:00 Network Security
      10:00-11:00 Network Security
      11:00-12:00 Network Security
      12:00-13:00 Network Security
      13:00-14:00 Network Security
      14:00-15:00 Network Security
      15:00-16:00 Network Security
      16:00-17:00 Network Security
      17:00-18:00 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
 

Capacity Curtailment on the GR-IT border for delivery period 20-09-2026

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

GR-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

20-09-2026 09:00 - 10:00 500 MW

20-09-2026 10:00 - 11:00 500 MW

20-09-2026 11:00 - 12:00 500 MW

20-09-2026 12:00 - 13:00 500 MW

20-09-2026 13:00 - 14:00 500 MW

20-09-2026 14:00 - 15:00 500 MW

20-09-2026 15:00 - 16:00 500 MW

20-09-2026 16:00 - 17:00 500 MW

5. Amount of LTTR remaining after curtailment:

20-09-2026 09:00 - 10:00 0 MW

20-09-2026 10:00 - 11:00 0 MW

20-09-2026 11:00 - 12:00 0 MW

20-09-2026 12:00 - 13:00 0 MW

20-09-2026 13:00 - 14:00 0 MW

20-09-2026 14:00 - 15:00 0 MW

20-09-2026 15:00 - 16:00 0 MW

20-09-2026 16:00 - 17:00 0 MW

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

HVDC cable ARACTHOS – GALATINA

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

Not Applicable

Capacity Curtailment on the ME-IT border for delivery period 20-09-2026

by JAO

1. TSO(s)*:

CGES

2. Identification of affected Long Term Transmission Rights:

ME-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

20-09-2026 09:00 - 10:00 400 MW

20-09-2026 10:00 - 11:00 400 MW

20-09-2026 11:00 - 12:00 400 MW

20-09-2026 12:00 - 13:00 400 MW

20-09-2026 13:00 - 14:00 400 MW

20-09-2026 14:00 - 15:00 400 MW

20-09-2026 15:00 - 16:00 400 MW

20-09-2026 16:00 - 17:00 400 MW

5. Amount of LTTR remaining after curtailment:

20-09-2026 09:00 - 10:00 0 MW

20-09-2026 10:00 - 11:00 0 MW

20-09-2026 11:00 - 12:00 0 MW

20-09-2026 12:00 - 13:00 0 MW

20-09-2026 13:00 - 14:00 0 MW

20-09-2026 14:00 - 15:00 0 MW

20-09-2026 15:00 - 16:00 0 MW

20-09-2026 16:00 - 17:00 0 MW

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

HVDC Monita

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

Publication Tool data for Core ID CCR IDA1 Delivery Day 18/09/2026

by JAO

Please be informed that, due to the partial decoupling of IDA1 for the delivery date 18/09/2026, no IDA1 publication data will be available in the CORE ID CCR Publication Tool 

Publication Tool data for Core ID CCR IDA1 Delivery Day 18/09/2026

by JAO

Please be informed that, due to the partial decoupling of IDA1 for the delivery date 18/09/2026, no IDA1 publication data will be available in the CORE ID CCR Publication Tool 

SDAC_JAO_01: SDAC market coupling DD/MM - Session complete

by JAO

Please be informed that the day-ahead market coupling session is now completed.

[SDAC_ExC_02a]: Delay in Preliminary Market Coupling Results publication

by JAO

Please be aware that the publication of the preliminary SDAC Market Coupling Results is delayed until further notice.

The Market Coupling Results will be published as soon as they are available.

If needed, another delay message will be sent out.

Further information can be found in the Fallback Manual that is published on the websites of NEMO Committee and ENTSO-E.

Therefore, if relevant, we advise you to update your shadow bids at JAO eCAT platform before 14:10.

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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Frequently asked questions

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

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