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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.

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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 IF1-GB-FR border for delivery period 24-06-2026

by JAO

1. TSO(s)*:

RNP

2. Identification of affected Long Term Transmission Rights:

IF1-GB-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

24-06-2026 00:00 - 01:00 1690 MW

24-06-2026 01:00 - 02:00 1690 MW

24-06-2026 02:00 - 03:00 1690 MW

24-06-2026 03:00 - 04:00 1690 MW

24-06-2026 04:00 - 05:00 1690 MW

24-06-2026 05:00 - 06:00 1690 MW

24-06-2026 06:00 - 07:00 1690 MW

24-06-2026 07:00 - 08:00 1690 MW

24-06-2026 08:00 - 09:00 1690 MW

24-06-2026 09:00 - 10:00 1690 MW

24-06-2026 10:00 - 11:00 1690 MW

24-06-2026 11:00 - 12:00 1690 MW

24-06-2026 12:00 - 13:00 1690 MW

24-06-2026 13:00 - 14:00 1690 MW

24-06-2026 14:00 - 15:00 1690 MW

24-06-2026 15:00 - 16:00 1690 MW

24-06-2026 16:00 - 17:00 1690 MW

24-06-2026 17:00 - 18:00 1690 MW

24-06-2026 18:00 - 19:00 1690 MW

24-06-2026 19:00 - 20:00 1690 MW

24-06-2026 20:00 - 21:00 1690 MW

24-06-2026 21:00 - 22:00 1690 MW

24-06-2026 22:00 - 23:00 1690 MW

24-06-2026 23:00 - 24:00 1690 MW

5. Amount of LTTR remaining after curtailment:

24-06-2026 00:00 - 01:00 1434 MW

24-06-2026 01:00 - 02:00 1434 MW

24-06-2026 02:00 - 03:00 1434 MW

24-06-2026 03:00 - 04:00 1434 MW

24-06-2026 04:00 - 05:00 1434 MW

24-06-2026 05:00 - 06:00 1434 MW

24-06-2026 06:00 - 07:00 1434 MW

24-06-2026 07:00 - 08:00 1434 MW

24-06-2026 08:00 - 09:00 1434 MW

24-06-2026 09:00 - 10:00 1434 MW

24-06-2026 10:00 - 11:00 1434 MW

24-06-2026 11:00 - 12:00 1434 MW

24-06-2026 12:00 - 13:00 1434 MW

24-06-2026 13:00 - 14:00 1434 MW

24-06-2026 14:00 - 15:00 1434 MW

24-06-2026 15:00 - 16:00 1434 MW

24-06-2026 16:00 - 17:00 1434 MW

24-06-2026 17:00 - 18:00 1434 MW

24-06-2026 18:00 - 19:00 1434 MW

24-06-2026 19:00 - 20:00 1434 MW

24-06-2026 20:00 - 21:00 1434 MW

24-06-2026 21:00 - 22:00 1434 MW

24-06-2026 22:00 - 23:00 1434 MW

24-06-2026 23:00 - 24:00 1434 MW

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

Thermal Limits

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

Capacity limitation due to unplanned maintenance

Capacity Curtailment on the IF1-FR-GB border for delivery period 24-06-2026

by JAO

1. TSO(s)*:

RNP

2. Identification of affected Long Term Transmission Rights:

IF1-FR-GB

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

24-06-2026 00:00 - 01:00 1700 MW

24-06-2026 01:00 - 02:00 1700 MW

24-06-2026 02:00 - 03:00 1700 MW

24-06-2026 03:00 - 04:00 1700 MW

24-06-2026 04:00 - 05:00 1700 MW

24-06-2026 05:00 - 06:00 1700 MW

24-06-2026 06:00 - 07:00 1700 MW

24-06-2026 07:00 - 08:00 1700 MW

24-06-2026 08:00 - 09:00 1700 MW

24-06-2026 09:00 - 10:00 1700 MW

24-06-2026 10:00 - 11:00 1700 MW

24-06-2026 11:00 - 12:00 1700 MW

24-06-2026 12:00 - 13:00 1700 MW

24-06-2026 13:00 - 14:00 1700 MW

24-06-2026 14:00 - 15:00 1700 MW

24-06-2026 15:00 - 16:00 1700 MW

24-06-2026 16:00 - 17:00 1700 MW

24-06-2026 17:00 - 18:00 1700 MW

24-06-2026 18:00 - 19:00 1700 MW

24-06-2026 19:00 - 20:00 1700 MW

24-06-2026 20:00 - 21:00 1700 MW

24-06-2026 21:00 - 22:00 1700 MW

24-06-2026 22:00 - 23:00 1700 MW

24-06-2026 23:00 - 24:00 1700 MW

5. Amount of LTTR remaining after curtailment:

24-06-2026 00:00 - 01:00 1452 MW

24-06-2026 01:00 - 02:00 1452 MW

24-06-2026 02:00 - 03:00 1452 MW

24-06-2026 03:00 - 04:00 1452 MW

24-06-2026 04:00 - 05:00 1452 MW

24-06-2026 05:00 - 06:00 1452 MW

24-06-2026 06:00 - 07:00 1452 MW

24-06-2026 07:00 - 08:00 1452 MW

24-06-2026 08:00 - 09:00 1452 MW

24-06-2026 09:00 - 10:00 1452 MW

24-06-2026 10:00 - 11:00 1452 MW

24-06-2026 11:00 - 12:00 1452 MW

24-06-2026 12:00 - 13:00 1452 MW

24-06-2026 13:00 - 14:00 1452 MW

24-06-2026 14:00 - 15:00 1452 MW

24-06-2026 15:00 - 16:00 1452 MW

24-06-2026 16:00 - 17:00 1452 MW

24-06-2026 17:00 - 18:00 1452 MW

24-06-2026 18:00 - 19:00 1452 MW

24-06-2026 19:00 - 20:00 1452 MW

24-06-2026 20:00 - 21:00 1452 MW

24-06-2026 21:00 - 22:00 1452 MW

24-06-2026 22:00 - 23:00 1452 MW

24-06-2026 23:00 - 24:00 1452 MW

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

Thermal Limits

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

Capacity limitation due to unplanned maintenance

Urgent update regarding the Open Test Session of 17-19th of June, 2026

by JAO

We regret to inform you that due to technical issues, we are unable to proceed with the testing of the new features of Block bids and auctions in 15 MTU on Swiss borders.

As a result, it will not be possible to place Block bids or test ST auctions on Swiss Borders in 15 min resolution during the upcoming Open Test Session.

However, to compensate for this limitation, JAO will still run the Open Test providing Market Participants with an opportunity to test their systems and bidding strategies.

This Open Test will, therefore, be focused on:

  • Daily auctions on NLL-BE-GB, EL1-GB-FR, RS-HR and RS-HU
  • Yearly and Monthly auction on IF1-FR-GB

Further details will be provided directly to registered Market Participants close to the Open Test dates.

The new test dates, which will include Block bids and auctions in 15 MTU on Swiss borders, will be communicated separately at a later stage.

Best regards,

JAO Operations

Capacity Curtailment on the DK-NL border for delivery period 12-06-2026

by JAO

1. TSO(s)*:

TenneT_NL

2. Identification of affected Long Term Transmission Rights:

DK-NL

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

12-06-2026 08:00 - 09:00 199 MW

12-06-2026 09:00 - 10:00 199 MW

12-06-2026 10:00 - 11:00 199 MW

12-06-2026 11:00 - 12:00 199 MW

12-06-2026 12:00 - 13:00 199 MW

12-06-2026 13:00 - 14:00 199 MW

12-06-2026 14:00 - 15:00 199 MW

12-06-2026 15:00 - 16:00 199 MW

12-06-2026 16:00 - 17:00 199 MW

5. Amount of LTTR remaining after curtailment:

12-06-2026 08:00 - 09:00 0 MW

12-06-2026 09:00 - 10:00 0 MW

12-06-2026 10:00 - 11:00 0 MW

12-06-2026 11:00 - 12:00 0 MW

12-06-2026 12:00 - 13:00 0 MW

12-06-2026 13:00 - 14:00 0 MW

12-06-2026 14:00 - 15:00 0 MW

12-06-2026 15:00 - 16:00 0 MW

12-06-2026 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 *:

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) *?

The remedial actions considered were assessed as not sufficient or ineffective to avoid the expected violation of operational security limit(s).

Capacity Curtailment on the SI-AT border for delivery period 11-06-2026

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:

11-06-2026 09:00 - 10:00 370 MW

11-06-2026 10:00 - 11:00 370 MW

11-06-2026 11:00 - 12:00 370 MW

11-06-2026 12:00 - 13:00 370 MW

11-06-2026 13:00 - 14:00 370 MW

11-06-2026 14:00 - 15:00 370 MW

5. Amount of LTTR remaining after curtailment:

11-06-2026 09:00 - 10:00 183 MW

11-06-2026 10:00 - 11:00 156 MW

11-06-2026 11:00 - 12:00 179 MW

11-06-2026 12:00 - 13:00 198 MW

11-06-2026 13:00 - 14:00 201 MW

11-06-2026 14:00 - 15:00 229 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 11-06-2026

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:

11-06-2026 09:00 - 10:00 350 MW

11-06-2026 10:00 - 11:00 350 MW

11-06-2026 11:00 - 12:00 350 MW

11-06-2026 12:00 - 13:00 350 MW

11-06-2026 13:00 - 14:00 350 MW

11-06-2026 14:00 - 15:00 350 MW

5. Amount of LTTR remaining after curtailment:

11-06-2026 09:00 - 10:00 95 MW

11-06-2026 10:00 - 11:00 70 MW

11-06-2026 11:00 - 12:00 65 MW

11-06-2026 12:00 - 13:00 65 MW

11-06-2026 13:00 - 14:00 87 MW

11-06-2026 14:00 - 15:00 99 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 11-06-2026

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:

11-06-2026 09:00 - 10:00 3620 MW

11-06-2026 10:00 - 11:00 3620 MW

11-06-2026 11:00 - 12:00 3620 MW

11-06-2026 12:00 - 13:00 3620 MW

11-06-2026 13:00 - 14:00 3620 MW

11-06-2026 14:00 - 15:00 3620 MW

5. Amount of LTTR remaining after curtailment:

11-06-2026 09:00 - 10:00 2329 MW

11-06-2026 10:00 - 11:00 2073 MW

11-06-2026 11:00 - 12:00 2019 MW

11-06-2026 12:00 - 13:00 2048 MW

11-06-2026 13:00 - 14:00 2293 MW

11-06-2026 14:00 - 15:00 2308 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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Check out the common questions and our answers on how to use the auction platform.

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