Leading service provider for Transmission System Operators (TSOs) in the European electricity market.

Please be advised that 25-05-2026 is a banking holiday in Luxembourg for Whit Monday http://www.jao.eu/resource-center/public-holidays

This holiday applies solely to the banking sector, and JAO Operations will remain available. 

Please note that any credit limit update resulting from transactions on your ING business account will not be reflected until 26-05-2026.

Additionally, transactions initiated after ING Luxembourg's cutoff time on 22-05-2026, will have a value date of 27-05-2026.

We kindly recommend that you adjust your financial schedule accordingly to accommodate these changes.

We are pleased to announce that the members’ testing for SDAC Market Coupling will take place on 03 June 2026. It provides an opportunity to fine-tune processes, validate key scenarios, and ensure everything is in place.

During the testing, TSO cross-border nomination processes and JAO shadow auctions will be active and available only during the day of execution, with the following scenario:

Delivery 04/06/2026 Full decoupling with shadow auction (including Nominations)

To register, please provide us with the following details:

Company Name

EIC Code

Full Name of Participant(s)

Email Address of Participant(s)

eCAT Username (if already registered)

Please note:

Registration is limited to members already participating in the shadow auction allocation in the production environment.

Interconnector entitlements will be copied from the production environment to facilitate nomination of shadow auction capacity towards the TSOs.

Deadline for registration: 26/05/2026. A reminder will be sent shortly before the end of the registration window.

Please find the information package attached.

Should you have any questions, do not hesitate to reach out to us at helpdesk@jao.eu

We are pleased to invite you to register for our upcoming open test session, scheduled to take place from June 17th to June 19th, 2026.

This event offers an excellent opportunity to:

• Test the transition of Short Term auctions on Swiss borders to 15 min MTU and block bids as per communicated here http://www.jao.eu/news/st-auctions-swiss-borders-15-min-mtu
• Participate in dummy auctions
• Thoroughly test your bid files
• Seamlessly integrate eCAT’s output files into your internal systems

To register, please reply to this email with the following information:

• Company name (registered companies only)
• EIC code
• Username (if already registered in eCAT) or your full name
• Email address

Please note that registration will close on June 10th, 2026.

Further details regarding timing, access, and specific testing scenarios will be provided in a follow-up communication.

We also sent out a survey this morning where you can give us an input on what you would like to test specifically. Please find the survey here https://emea.dcv.ms/HxA5ZanFFZ

If you have any questions or would like to share feedback, please don’t hesitate to reach out. Your participation and insights are highly appreciated.

Best regards,

JAO Operations Team

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:

21-05-2026 08:00 - 09:00 347 MW

21-05-2026 09:00 - 10:00 347 MW

21-05-2026 10:00 - 11:00 347 MW

21-05-2026 11:00 - 12:00 347 MW

21-05-2026 12:00 - 13:00 347 MW

21-05-2026 13:00 - 14:00 347 MW

21-05-2026 14:00 - 15:00 347 MW

21-05-2026 15:00 - 16:00 347 MW

21-05-2026 16:00 - 17:00 347 MW

5. Amount of LTTR remaining after curtailment:

21-05-2026 08:00 - 09:00 47 MW

21-05-2026 09:00 - 10:00 50 MW

21-05-2026 10:00 - 11:00 48 MW

21-05-2026 11:00 - 12:00 44 MW

21-05-2026 12:00 - 13:00 70 MW

21-05-2026 13:00 - 14:00 77 MW

21-05-2026 14:00 - 15:00 44 MW

21-05-2026 15:00 - 16:00 81 MW

21-05-2026 16:00 - 17:00 84 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.

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:

21-05-2026 08:00 - 09:00 295 MW

21-05-2026 09:00 - 10:00 295 MW

21-05-2026 10:00 - 11:00 295 MW

21-05-2026 11:00 - 12:00 295 MW

21-05-2026 12:00 - 13:00 295 MW

21-05-2026 13:00 - 14:00 295 MW

21-05-2026 14:00 - 15:00 295 MW

21-05-2026 15:00 - 16:00 295 MW

21-05-2026 16:00 - 17:00 295 MW

5. Amount of LTTR remaining after curtailment:

21-05-2026 08:00 - 09:00 82 MW

21-05-2026 09:00 - 10:00 96 MW

21-05-2026 10:00 - 11:00 96 MW

21-05-2026 11:00 - 12:00 78 MW

21-05-2026 12:00 - 13:00 123 MW

21-05-2026 13:00 - 14:00 127 MW

21-05-2026 14:00 - 15:00 78 MW

21-05-2026 15:00 - 16:00 140 MW

21-05-2026 16:00 - 17:00 143 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 in the calculation.

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:

21-05-2026 08:00 - 09:00 350 MW

21-05-2026 09:00 - 10:00 350 MW

21-05-2026 10:00 - 11:00 350 MW

21-05-2026 11:00 - 12:00 350 MW

21-05-2026 12:00 - 13:00 350 MW

21-05-2026 13:00 - 14:00 350 MW

21-05-2026 14:00 - 15:00 350 MW

21-05-2026 15:00 - 16:00 350 MW

21-05-2026 16:00 - 17:00 350 MW

5. Amount of LTTR remaining after curtailment:

21-05-2026 08:00 - 09:00 64 MW

21-05-2026 09:00 - 10:00 87 MW

21-05-2026 10:00 - 11:00 109 MW

21-05-2026 11:00 - 12:00 169 MW

21-05-2026 12:00 - 13:00 210 MW

21-05-2026 13:00 - 14:00 190 MW

21-05-2026 14:00 - 15:00 151 MW

21-05-2026 15:00 - 16:00 109 MW

21-05-2026 16:00 - 17:00 151 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.

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:

21-05-2026 08:00 - 09:00 3620 MW

21-05-2026 09:00 - 10:00 3620 MW

21-05-2026 10:00 - 11:00 3620 MW

21-05-2026 11:00 - 12:00 3620 MW

21-05-2026 12:00 - 13:00 3620 MW

21-05-2026 13:00 - 14:00 3620 MW

21-05-2026 14:00 - 15:00 3620 MW

21-05-2026 15:00 - 16:00 3620 MW

21-05-2026 16:00 - 17:00 3620 MW

5. Amount of LTTR remaining after curtailment:

21-05-2026 08:00 - 09:00 648 MW

21-05-2026 09:00 - 10:00 901 MW

21-05-2026 10:00 - 11:00 969 MW

21-05-2026 11:00 - 12:00 1444 MW

21-05-2026 12:00 - 13:00 1842 MW

21-05-2026 13:00 - 14:00 1674 MW

21-05-2026 14:00 - 15:00 1327 MW

21-05-2026 15:00 - 16:00 967 MW

21-05-2026 16:00 - 17:00 1343 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.