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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 IT-GR border for delivery period 23/02/2026

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

IT-GR

3, Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

4. Affected volume in MW / period:

23-02-2026 09:00 - 10:00 499 MW

23-02-2026 10:00 - 11:00 499 MW

23-02-2026 11:00 - 12:00 499 MW

23-02-2026 12:00 - 13:00 499 MW

23-02-2026 13:00 - 14:00 499 MW

5. Amount of LTTR remaining after curtailment:

23-02-2026 09:00 - 10:00 0 MW

23-02-2026 10:00 - 11:00 0 MW

23-02-2026 11:00 - 12:00 0 MW

23-02-2026 12:00 - 13:00 0 MW

23-02-2026 13:00 - 14:00 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)*?

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-IT border for delivery period 23/02/2026

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 / period:

23-02-2026 09:00 - 10:00 500 MW

23-02-2026 10:00 - 11:00 500 MW

23-02-2026 11:00 - 12:00 500 MW

23-02-2026 12:00 - 13:00 500 MW

23-02-2026 13:00 - 14:00 500 MW

5. Amount of LTTR remaining after curtailment:

23-02-2026 09:00 - 10:00 0 MW

23-02-2026 10:00 - 11:00 0 MW

23-02-2026 11:00 - 12:00 0 MW

23-02-2026 12:00 - 13:00 0 MW

23-02-2026 13:00 - 14:00 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)*?

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-IT border for delivery period 22-02-2026

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 / period:

22-02-2026 11:00 - 12:00 176 MW

22-02-2026 12:00 - 13:00 176 MW

5. Amount of LTTR remaining after curtailment:

22-02-2026 11:00 - 12:00 150 MW

22-02-2026 12:00 - 13:00 143 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

 

Capacity Curtailment on the GR-IT border for delivery period 22-02-2026

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 / period:

22-02-2026 08:00 - 09:00 500 MW

22-02-2026 09:00 - 10:00 500 MW

22-02-2026 10:00 - 11:00 500 MW

22-02-2026 11:00 - 12:00 500 MW

22-02-2026 12:00 - 13:00 500 MW

22-02-2026 13:00 - 14:00 500 MW

22-02-2026 14:00 - 15:00 500 MW

22-02-2026 15:00 - 16:00 500 MW

22-02-2026 16:00 - 17:00 500 MW

5. Amount of LTTR remaining after curtailment:

22-02-2026 08:00 - 09:00 0 MW

22-02-2026 09:00 - 10:00 0 MW

22-02-2026 10:00 - 11:00 0 MW

22-02-2026 11:00 - 12:00 0 MW

22-02-2026 12:00 - 13:00 0 MW

22-02-2026 13:00 - 14:00 0 MW

22-02-2026 14:00 - 15:00 0 MW

22-02-2026 15:00 - 16:00 0 MW

22-02-2026 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

Delay in Rights Documents Distribution for NLL ID 00-06 for mkt period 21/02

by JAO

We are currently experiencing technical issues with the distribution of the Rights Documents for the following auctions:

NLL-BE-GB-I-ID0006-260221-01

NLL-GB-BE-I-ID0006-260221-01

We kindly request that you please download the files directly from the Trader UI.

Thank you for your cooperation.

Capacity Curtailment on the ME-IT border for delivery period 22-02-2026

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:

22-02-2026 08:00 - 09:00 399 MW

22-02-2026 09:00 - 10:00 399 MW

22-02-2026 10:00 - 11:00 399 MW

22-02-2026 11:00 - 12:00 399 MW

22-02-2026 12:00 - 13:00 399 MW

22-02-2026 13:00 - 14:00 399 MW

22-02-2026 14:00 - 15:00 399 MW

22-02-2026 15:00 - 16:00 399 MW

22-02-2026 16:00 - 17:00 399 MW

5. Amount of LTTR remaining after curtailment:

22-02-2026 08:00 - 09:00 0 MW

22-02-2026 09:00 - 10:00 0 MW

22-02-2026 10:00 - 11:00 0 MW

22-02-2026 11:00 - 12:00 0 MW

22-02-2026 12:00 - 13:00 0 MW

22-02-2026 13:00 - 14:00 0 MW

22-02-2026 14:00 - 15:00 0 MW

22-02-2026 15:00 - 16:00 0 MW

22-02-2026 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

*According to section 57.3 of the EU HAR, this field can be filled in within 24 hours after the initial publication

Invitation to Open Call for Market Participants

by JAO

Dear Market Participants,

We are excited to invite you to our next Open Call on 3rd of March 2026, at 14:00 via Microsoft Teams. As a reminder, this meeting offers a valuable opportunity for us to collaborate, share updates, and discuss any topics of interest. Please download the attached invitation file and add it to your calendar as a reminder for the meeting.

You are also welcome to forward it to any colleagues who may benefit from it. Should you have any questions or require clarification on any JAO services, kindly submit them either here or by scanning the QR code below by 25 February EOD.

Proposed Agenda:

• Cybersecurity

• Auction calendar

• Project update

• Orion - The Allocation Tool

• JAO Support Hub

• Annual Surveys reminder

 

JAO Customer Service and Relationship Management

Attachments

Resource Center

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

Go to resources

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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