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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.

 

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

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Capacity Curtailment on the EE-LV border for delivery period 15-03-2026

by JAO

1. TSO(s)*:

ELERING

2. Identification of affected Long Term Transmission Rights:

EE-LV

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

15-03-2026 08:00 - 09:00 449 MW

15-03-2026 09:00 - 10:00 449 MW

15-03-2026 10:00 - 11:00 449 MW

15-03-2026 11:00 - 12:00 449 MW

15-03-2026 12:00 - 13:00 449 MW

15-03-2026 13:00 - 14:00 449 MW

15-03-2026 14:00 - 15:00 449 MW

15-03-2026 15:00 - 16:00 449 MW

15-03-2026 16:00 - 17:00 449 MW

15-03-2026 17:00 - 18:00 449 MW

15-03-2026 18:00 - 19:00 449 MW

15-03-2026 19:00 - 20:00 449 MW

15-03-2026 20:00 - 21:00 449 MW

15-03-2026 21:00 - 22:00 449 MW

15-03-2026 22:00 - 23:00 449 MW

15-03-2026 23:00 - 24:00 449 MW

5. Amount of LTTR remaining after curtailment:

15-03-2026 08:00 - 09:00 419 MW

15-03-2026 09:00 - 10:00 419 MW

15-03-2026 10:00 - 11:00 419 MW

15-03-2026 11:00 - 12:00 419 MW

15-03-2026 12:00 - 13:00 419 MW

15-03-2026 13:00 - 14:00 419 MW

15-03-2026 14:00 - 15:00 419 MW

15-03-2026 15:00 - 16:00 419 MW

15-03-2026 16:00 - 17:00 420 MW

15-03-2026 17:00 - 18:00 419 MW

15-03-2026 18:00 - 19:00 420 MW

15-03-2026 19:00 - 20:00 420 MW

15-03-2026 20:00 - 21:00 420 MW

15-03-2026 21:00 - 22:00 420 MW

15-03-2026 22:00 - 23:00 420 MW

15-03-2026 23:00 - 24:00 420 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 SI-AT border for delivery period 15-03-2026

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:

15-03-2026 07:00 - 08:00 430 MW

15-03-2026 08:00 - 09:00 430 MW

15-03-2026 09:00 - 10:00 430 MW

15-03-2026 10:00 - 11:00 430 MW

15-03-2026 11:00 - 12:00 430 MW

15-03-2026 12:00 - 13:00 430 MW

15-03-2026 13:00 - 14:00 430 MW

15-03-2026 14:00 - 15:00 430 MW

15-03-2026 15:00 - 16:00 430 MW

5. Amount of LTTR remaining after curtailment:

15-03-2026 07:00 - 08:00 37 MW

15-03-2026 08:00 - 09:00 37 MW

15-03-2026 09:00 - 10:00 37 MW

15-03-2026 10:00 - 11:00 37 MW

15-03-2026 11:00 - 12:00 37 MW

15-03-2026 12:00 - 13:00 37 MW

15-03-2026 13:00 - 14:00 37 MW

15-03-2026 14:00 - 15:00 37 MW

15-03-2026 15:00 - 16:00 37 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.

*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 HU-AT border for delivery period 15-03-2026

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:

15-03-2026 07:00 - 08:00 340 MW

15-03-2026 08:00 - 09:00 340 MW

15-03-2026 09:00 - 10:00 340 MW

15-03-2026 10:00 - 11:00 340 MW

15-03-2026 11:00 - 12:00 340 MW

15-03-2026 12:00 - 13:00 340 MW

15-03-2026 13:00 - 14:00 340 MW

15-03-2026 14:00 - 15:00 340 MW

15-03-2026 15:00 - 16:00 340 MW

5. Amount of LTTR remaining after curtailment:

15-03-2026 07:00 - 08:00 34 MW

15-03-2026 08:00 - 09:00 34 MW

15-03-2026 09:00 - 10:00 34 MW

15-03-2026 10:00 - 11:00 34 MW

15-03-2026 11:00 - 12:00 34 MW

15-03-2026 12:00 - 13:00 34 MW

15-03-2026 13:00 - 14:00 34 MW

15-03-2026 14:00 - 15:00 34 MW

15-03-2026 15:00 - 16:00 34 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.

*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-CZ border for delivery period 15-03-2026

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:

15-03-2026 07:00 - 08:00 350 MW

15-03-2026 08:00 - 09:00 350 MW

15-03-2026 09:00 - 10:00 350 MW

15-03-2026 10:00 - 11:00 350 MW

15-03-2026 11:00 - 12:00 350 MW

15-03-2026 12:00 - 13:00 350 MW

15-03-2026 13:00 - 14:00 350 MW

15-03-2026 14:00 - 15:00 350 MW

15-03-2026 15:00 - 16:00 350 MW

5. Amount of LTTR remaining after curtailment:

15-03-2026 07:00 - 08:00 39 MW

15-03-2026 08:00 - 09:00 39 MW

15-03-2026 09:00 - 10:00 39 MW

15-03-2026 10:00 - 11:00 39 MW

15-03-2026 11:00 - 12:00 39 MW

15-03-2026 12:00 - 13:00 39 MW

15-03-2026 13:00 - 14:00 39 MW

15-03-2026 14:00 - 15:00 39 MW

15-03-2026 15:00 - 16:00 39 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.

*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-DE border for delivery period 15-03-2026

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:

15-03-2026 07:00 - 08:00 4420 MW

15-03-2026 08:00 - 09:00 4420 MW

15-03-2026 09:00 - 10:00 4420 MW

15-03-2026 10:00 - 11:00 4420 MW

15-03-2026 11:00 - 12:00 4420 MW

15-03-2026 12:00 - 13:00 4420 MW

15-03-2026 13:00 - 14:00 4420 MW

15-03-2026 14:00 - 15:00 4420 MW

15-03-2026 15:00 - 16:00 4420 MW

5. Amount of LTTR remaining after curtailment:

15-03-2026 07:00 - 08:00 1549 MW

15-03-2026 08:00 - 09:00 1549 MW

15-03-2026 09:00 - 10:00 1549 MW

15-03-2026 10:00 - 11:00 1549 MW

15-03-2026 11:00 - 12:00 1549 MW

15-03-2026 12:00 - 13:00 1549 MW

15-03-2026 13:00 - 14:00 1549 MW

15-03-2026 14:00 - 15:00 1549 MW

15-03-2026 15:00 - 16:00 1549 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.

*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 GR-IT border for delivery period 15-03-2026

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:

15-03-2026 08:00 - 09:00 500 MW

15-03-2026 09:00 - 10:00 500 MW

15-03-2026 10:00 - 11:00 500 MW

15-03-2026 11:00 - 12:00 500 MW

15-03-2026 12:00 - 13:00 500 MW

15-03-2026 13:00 - 14:00 500 MW

15-03-2026 14:00 - 15:00 500 MW

15-03-2026 15:00 - 16:00 500 MW

15-03-2026 16:00 - 17:00 500 MW

5. Amount of LTTR remaining after curtailment:

15-03-2026 08:00 - 09:00 0 MW

15-03-2026 09:00 - 10:00 0 MW

15-03-2026 10:00 - 11:00 0 MW

15-03-2026 11:00 - 12:00 0 MW

15-03-2026 12:00 - 13:00 0 MW

15-03-2026 13:00 - 14:00 0 MW

15-03-2026 14:00 - 15:00 0 MW

15-03-2026 15:00 - 16:00 0 MW

15-03-2026 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

*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 IF1-GB-FR border for delivery period 16-03-2026

by JAO

1. TSO(s)*:

National Grid Interconnectors Limited (NGIC) and RTE EDF Transport S.A. (RTE)

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:

16-03-2026 15:00 - 16:00 1492 MW

16-03-2026 16:00 - 17:00 1492 MW

5. Amount of LTTR remaining after curtailment:

16-03-2026 15:00 - 16:00 947 MW

16-03-2026 16:00 - 17:00 947 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 planned maintenance

Resource Center

This section contains key information for market participants such as user guides, forms, auction rules, nomination deadlines and other documents.

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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.

Get to know us

Register your company

We created a user guide to support the onboarding of market participants. Learn more about the steps to register, the required documents and our service desk platform.

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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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Do you need support?

If you can't find an answer to your question, our team is here to help!

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