Cover of Annual report 2024
See Our

Annual Report

Read here

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

Go to Message Board
Go to Message board

Capacity Curtailment on the HU-AT border for delivery period 07-03-2026

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:

07-03-2026 08:00 - 09:00 340 MW

07-03-2026 09:00 - 10:00 340 MW

07-03-2026 10:00 - 11:00 340 MW

07-03-2026 11:00 - 12:00 340 MW

07-03-2026 12:00 - 13:00 340 MW

07-03-2026 13:00 - 14:00 340 MW

07-03-2026 14:00 - 15:00 340 MW

07-03-2026 15:00 - 16:00 340 MW

5. Amount of LTTR remaining after curtailment:

07-03-2026 08:00 - 09:00 34 MW

07-03-2026 09:00 - 10:00 34 MW

07-03-2026 10:00 - 11:00 34 MW

07-03-2026 11:00 - 12:00 34 MW

07-03-2026 12:00 - 13:00 34 MW

07-03-2026 13:00 - 14:00 34 MW

07-03-2026 14:00 - 15:00 34 MW

07-03-2026 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.

Capacity Curtailment on the SI-AT border for delivery period 07-03-2026

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:

07-03-2026 08:00 - 09:00 430 MW

07-03-2026 09:00 - 10:00 430 MW

07-03-2026 10:00 - 11:00 430 MW

07-03-2026 11:00 - 12:00 430 MW

07-03-2026 12:00 - 13:00 430 MW

07-03-2026 13:00 - 14:00 430 MW

07-03-2026 14:00 - 15:00 430 MW

07-03-2026 15:00 - 16:00 430 MW

5. Amount of LTTR remaining after curtailment:

07-03-2026 08:00 - 09:00 37 MW

07-03-2026 09:00 - 10:00 37 MW

07-03-2026 10:00 - 11:00 37 MW

07-03-2026 11:00 - 12:00 37 MW

07-03-2026 12:00 - 13:00 37 MW

07-03-2026 13:00 - 14:00 37 MW

07-03-2026 14:00 - 15:00 37 MW

07-03-2026 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 AT-CZ border for delivery period 07-03-2026

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:

07-03-2026 08:00 - 09:00 350 MW

07-03-2026 09:00 - 10:00 350 MW

07-03-2026 10:00 - 11:00 350 MW

07-03-2026 11:00 - 12:00 350 MW

07-03-2026 12:00 - 13:00 350 MW

07-03-2026 13:00 - 14:00 350 MW

07-03-2026 14:00 - 15:00 350 MW

07-03-2026 15:00 - 16:00 350 MW

5. Amount of LTTR remaining after curtailment:

07-03-2026 08:00 - 09:00 39 MW

07-03-2026 09:00 - 10:00 39 MW

07-03-2026 10:00 - 11:00 39 MW

07-03-2026 11:00 - 12:00 39 MW

07-03-2026 12:00 - 13:00 39 MW

07-03-2026 13:00 - 14:00 39 MW

07-03-2026 14:00 - 15:00 39 MW

07-03-2026 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.

Capacity Curtailment on the AT-DE border for delivery period 07-03-2026

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:

07-03-2026 08:00 - 09:00 4420 MW

07-03-2026 09:00 - 10:00 4420 MW

07-03-2026 10:00 - 11:00 4420 MW

07-03-2026 11:00 - 12:00 4420 MW

07-03-2026 12:00 - 13:00 4420 MW

07-03-2026 13:00 - 14:00 4420 MW

07-03-2026 14:00 - 15:00 4420 MW

07-03-2026 15:00 - 16:00 4420 MW

5. Amount of LTTR remaining after curtailment:

07-03-2026 08:00 - 09:00 31 MW

07-03-2026 09:00 - 10:00 31 MW

07-03-2026 10:00 - 11:00 31 MW

07-03-2026 11:00 - 12:00 31 MW

07-03-2026 12:00 - 13:00 31 MW

07-03-2026 13:00 - 14:00 31 MW

07-03-2026 14:00 - 15:00 31 MW

07-03-2026 15:00 - 16:00 31 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 07-03-2026

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:

07-03-2026 10:00 - 11:00 500 MW

07-03-2026 11:00 - 12:00 500 MW

07-03-2026 12:00 - 13:00 500 MW

07-03-2026 13:00 - 14:00 500 MW

07-03-2026 14:00 - 15:00 500 MW

5. Amount of LTTR remaining after curtailment:

07-03-2026 10:00 - 11:00 0 MW

07-03-2026 11:00 - 12:00 0 MW

07-03-2026 12:00 - 13:00 0 MW

07-03-2026 13:00 - 14:00 0 MW

07-03-2026 14:00 - 15:00 0 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

2026 Auction Calendar update

by JAO

We would like to inform you that as per TSOs request, the 2026 Auction Calendar has been updated on the corridor IFA1, IFA2, NLL, VKL.

For more details please refer to the Auction Calendar on our webpage http://www.jao.eu/auctions#/calendar/table to find its latest version.

Capacity Curtailment on the GR-IT border for delivery period 07-03-2026

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:

07-03-2026 10:00 - 11:00 500 MW

07-03-2026 11:00 - 12:00 500 MW

07-03-2026 12:00 - 13:00 500 MW

07-03-2026 13:00 - 14:00 500 MW

07-03-2026 14:00 - 15:00 500 MW

5. Amount of LTTR remaining after curtailment:

07-03-2026 10:00 - 11:00 0 MW

07-03-2026 11:00 - 12:00 0 MW

07-03-2026 12:00 - 13:00 0 MW

07-03-2026 13:00 - 14:00 0 MW

07-03-2026 14:00 - 15:00 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

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.

Go to registration
JAO workers

Frequently asked questions

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

Go to FAQ

Do you need support?

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

Go to service desk