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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

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 11-01-2026

Published: 09/01/2026 | 19:05 by JAO
Capacity Curtailment on the ME-IT border for delivery period 11-01-2026

Published: 09/01/2026 | 16:37 by JAO
2026 Auction Calendar update

Published: 09/01/2026 | 15:06 by JAO
Capacity Curtailment on the GR-IT border for delivery period 11-01-2026

Published: 09/01/2026 | 13:36 by JAO
Capacity Curtailment on the BE-DE & DE-BE border for delivery period 12-01-2026

Published: 09/01/2026 | 12:12 by JAO
Capacity Curtailment on the CH-IT border for delivery period 09-01-2026

Published: 08/01/2026 | 07:49 by JAO
Capacity Curtailment on the SI-IT border for delivery period 09-01-2026

Published: 08/01/2026 | 07:34 by JAO

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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 / hour for each concerned period:

11-01-2026 09:00 - 10:00 500 MW

11-01-2026 10:00 - 11:00 500 MW

11-01-2026 11:00 - 12:00 500 MW

11-01-2026 12:00 - 13:00 500 MW

11-01-2026 13:00 - 14:00 500 MW

11-01-2026 14:00 - 15:00 500 MW

11-01-2026 15:00 - 16:00 500 MW

5. Amount of LTTR remaining after curtailment:

11-01-2026 09:00 - 10:00 0 MW

11-01-2026 10:00 - 11:00 0 MW

11-01-2026 11:00 - 12:00 0 MW

11-01-2026 12:00 - 13:00 0 MW

11-01-2026 13:00 - 14:00 0 MW

11-01-2026 14:00 - 15:00 0 MW

11-01-2026 15:00 - 16:00 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)*?

During the CC process, all the remedial actions provided by the TSOs are already considered by the CC

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

1. TSO(s)*:

TERNA, 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:

11-01-2026 09:00 - 10:00 400 MW

11-01-2026 10:00 - 11:00 400 MW

11-01-2026 11:00 - 12:00 400 MW

11-01-2026 12:00 - 13:00 400 MW

11-01-2026 13:00 - 14:00 400 MW

11-01-2026 14:00 - 15:00 400 MW

11-01-2026 15:00 - 16:00 400 MW

5. Amount of LTTR remaining after curtailment:

11-01-2026 09:00 - 10:00 0 MW

11-01-2026 10:00 - 11:00 0 MW

11-01-2026 11:00 - 12:00 0 MW

11-01-2026 12:00 - 13:00 0 MW

11-01-2026 13:00 - 14:00 0 MW

11-01-2026 14:00 - 15:00 0 MW

11-01-2026 15:00 - 16:00 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

We would like to inform you that as per TSOs request, the 2026 Auction Calendar has been updated on the corridor EL1.

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

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:

11-01-2026 09:00 - 10:00 500 MW

11-01-2026 10:00 - 11:00 500 MW

11-01-2026 11:00 - 12:00 500 MW

11-01-2026 12:00 - 13:00 500 MW

11-01-2026 13:00 - 14:00 500 MW

11-01-2026 14:00 - 15:00 500 MW

11-01-2026 15:00 - 16:00 500 MW

5. Amount of LTTR remaining after curtailment:

11-01-2026 09:00 - 10:00 0 MW

11-01-2026 10:00 - 11:00 0 MW

11-01-2026 11:00 - 12:00 0 MW

11-01-2026 12:00 - 13:00 0 MW

11-01-2026 13:00 - 14:00 0 MW

11-01-2026 14:00 - 15:00 0 MW

11-01-2026 15:00 - 16:00 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)*?

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

1. TSO(s)*:

Amprion, Elia

2. Identification of affected Long Term Transmission Rights:

BE-DE & DE-BE

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

12-01-2026 08:00 - 09:00 500 MW

12-01-2026 09:00 - 10:00 500 MW

12-01-2026 10:00 - 11:00 500 MW

12-01-2026 11:00 - 12:00 500 MW

12-01-2026 12:00 - 13:00 500 MW

12-01-2026 13:00 - 14:00 500 MW

12-01-2026 14:00 - 15:00 500 MW

12-01-2026 15:00 - 16:00 500 MW

5. Amount of LTTR remaining after curtailment:

12-01-2026 08:00 - 09:00 0 MW

12-01-2026 09:00 - 10:00 0 MW

12-01-2026 10:00 - 11:00 0 MW

12-01-2026 11:00 - 12:00 0 MW

12-01-2026 12:00 - 13:00 0 MW

12-01-2026 13:00 - 14:00 0 MW

12-01-2026 14:00 - 15:00 0 MW

12-01-2026 15:00 - 16:00 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)*?

Reason for this curtailment is a forced outage on the ALEGrO DC interconnector which is the only tie-line between Belgian and German bidding zones.

1. TSO(s)*:

SWISSGRID

2. Identification of affected Long Term Transmission Rights:

CH-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

09-01-2026 08:00 - 09:00 2786 MW

09-01-2026 09:00 - 10:00 2786 MW

09-01-2026 10:00 - 11:00 2786 MW

09-01-2026 11:00 - 12:00 2786 MW

09-01-2026 12:00 - 13:00 2786 MW

09-01-2026 13:00 - 14:00 2786 MW

09-01-2026 14:00 - 15:00 2786 MW

09-01-2026 15:00 - 16:00 2786 MW

09-01-2026 16:00 - 17:00 2786 MW

5. Amount of LTTR remaining after curtailment:

09-01-2026 08:00 - 09:00 2644 MW

09-01-2026 09:00 - 10:00 2143 MW

09-01-2026 10:00 - 11:00 2143 MW

09-01-2026 11:00 - 12:00 2143 MW

09-01-2026 12:00 - 13:00 2218 MW

09-01-2026 13:00 - 14:00 2218 MW

09-01-2026 14:00 - 15:00 2218 MW

09-01-2026 15:00 - 16:00 2423 MW

09-01-2026 16:00 - 17:00 2423 MW

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

SI-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

09-01-2026 18:00 - 19:00 310 MW

09-01-2026 19:00 - 20:00 310 MW

09-01-2026 20:00 - 21:00 310 MW

09-01-2026 21:00 - 22:00 310 MW

09-01-2026 22:00 - 23:00 310 MW

09-01-2026 23:00 - 24:00 310 MW

5. Amount of LTTR remaining after curtailment:

09-01-2026 18:00 - 19:00 256 MW

09-01-2026 19:00 - 20:00 256 MW

09-01-2026 20:00 - 21:00 256 MW

09-01-2026 21:00 - 22:00 265 MW

09-01-2026 22:00 - 23:00 265 MW

09-01-2026 23:00 - 24:00 248 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

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.

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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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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