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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.

 

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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

Capacity Curtailment on the ES-FR border for delivery period 30-09-2026

by JAO

1. TSO(s)*:

RTE, REE

2. Identification of affected Long Term Transmission Rights:

ES-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

30-09-2026 19:00 - 20:00 1119 MW

30-09-2026 20:00 - 21:00 1119 MW

30-09-2026 21:00 - 22:00 1119 MW

5. Amount of LTTR remaining after curtailment:

30-09-2026 19:00 - 20:00 703 MW

30-09-2026 20:00 - 21:00 256 MW

30-09-2026 21:00 - 22:00 166 MW

6. Information on exact operational security limit(s) that are expected to be violated in the absence of curtailment*:

00:00-01:00 Network security

01:00-02:00 Network security

02:00-03:00 Network security

03:00-04:00 Network security

04:00-05:00 Network security

05:00-06:00 Network security

7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s)*?

The available remedial actions were assessed as insufficient or ineffective to avoid the violation of operational security limits.

Capacity Curtailment on the FR-ES border for delivery period 30-09-2026

by JAO

1. TSO(s)*:

RTE, REE

2. Identification of affected Long Term Transmission Rights:

FR-ES

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

30-09-2026 00:00 - 01:00 2149 MW

30-09-2026 01:00 - 02:00 2149 MW

30-09-2026 02:00 - 03:00 2149 MW

30-09-2026 03:00 - 04:00 2149 MW

30-09-2026 04:00 - 05:00 2149 MW

30-09-2026 05:00 - 06:00 2149 MW

5. Amount of LTTR remaining after curtailment:

30-09-2026 00:00 - 01:00 1217 MW

30-09-2026 01:00 - 02:00 1217 MW

30-09-2026 02:00 - 03:00 1217 MW

30-09-2026 03:00 - 04:00 1217 MW

30-09-2026 04:00 - 05:00 1724 MW

30-09-2026 05:00 - 06:00 1724 MW

6. Information on exact operational security limit(s) that are expected to be violated in the absence of curtailment*:

00:00-01:00 Network security

01:00-02:00 Network security

02:00-03:00 Network security

03:00-04:00 Network security

04:00-05:00 Network security

05:00-06:00 Network security

7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s)*?

The available remedial actions were assessed as insufficient or ineffective to avoid the violation of operational security limits.

Capacity Curtailment on the SI-AT border for delivery period 30-09-2026

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 :

• 09/30/2026

29-09-2026 12:00 - 13:00 310 MW

29-09-2026 13:00 - 14:00 310 MW

29-09-2026 14:00 - 15:00 310 MW

29-09-2026 15:00 - 16:00 310 MW

5. Amount of LTTR remaining after curtailment:

29-09-2026 12:00 - 13:00 151MW

29-09-2026 13:00 - 14:00 153MW

29-09-2026 14:00 - 15:00 141MW

29-09-2026 15:00 - 16:00 151MW

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 HU-AT border for delivery period 30-09-2026

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 :

• 09/30/2026

      • 12:00 - 13:00 260MW

      • 13:00 - 14:00 260MW

      • 14:00 - 15:00 260MW

      • 15:00 - 16:00 260MW

5. Amount of LTTR remaining after curtailment:

• 12:00 - 13:00 190MW

• 13:00 - 14:00 204MW

• 14:00 - 15:00 204MW

• 15:00 - 16:00 186MW

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-CZ border for delivery period 30-09-2026

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:

29-09-2026 12:00 - 13:00 350 MW

29-09-2026 13:00 - 14:00 350 MW

29-09-2026 14:00 - 15:00 350 MW

29-09-2026 15:00 - 16:00 350 MW

5. Amount of LTTR remaining after curtailment:

29-09-2026 12:00 - 13:00 107 MW

29-09-2026 13:00 - 14:00 107 MW

29-09-2026 14:00 - 15:00 107 MW

29-09-2026 15:00 - 16:00 99 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 30-09-2026

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 :

• 09/30/2026

      • 12:00 - 13:00 3819MW

      • 13:00 - 14:00 3819MW

      • 14:00 - 15:00 3819MW

      • 15:00 - 16:00 3819MW

5. Amount of LTTR remaining after curtailment:

  • 12:00 - 13:00 1204MW

  • 13:00 - 14:00 1199MW

  • 14:00 - 15:00 1200MW

  • 15:00 - 16:00 1200MW

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 IF1-GB-FR border for delivery period 01-10-2026 -12-10-2027

by JAO

1. TSO(s)*:

RNP

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:

01-10-2026 to 12-10-12026

00:00 - 01:00 1299 MW

 01:00 - 02:00 1299 MW

 02:00 - 03:00 1299 MW

 03:00 - 04:00 1299 MW

 04:00 - 05:00 1299 MW

 05:00 - 06:00 1299 MW

 06:00 - 07:00 1299 MW

 07:00 - 08:00 1299 MW

 08:00 - 09:00 1299 MW

 09:00 - 10:00 1299 MW

 10:00 - 11:00 1299 MW

 11:00 - 12:00 1299 MW

 12:00 - 13:00 1299 MW

 13:00 - 14:00 1299 MW

 14:00 - 15:00 1299 MW

 15:00 - 16:00 1299 MW

 16:00 - 17:00 1299 MW

 17:00 - 18:00 1299 MW

 18:00 - 19:00 1299 MW

 19:00 - 20:00 1299 MW

 20:00 - 21:00 1299 MW

 21:00 - 22:00 1299 MW

 22:00 - 23:00 1299 MW

 23:00 - 24:00 1299 MW

5. Amount of LTTR remaining after curtailment:

01-10-2026 to 12-10-12026

00:00 - 01:00 957 MW

 01:00 - 02:00 957 MW

 02:00 - 03:00 957 MW

 03:00 - 04:00 957 MW

 04:00 - 05:00 957 MW

 05:00 - 06:00 957 MW

 06:00 - 07:00 957 MW

 07:00 - 08:00 957 MW

 08:00 - 09:00 957 MW

 09:00 - 10:00 957 MW

 10:00 - 11:00 957 MW

 11:00 - 12:00 957 MW

 12:00 - 13:00 957 MW

 13:00 - 14:00 957 MW

 14:00 - 15:00 957 MW

 15:00 - 16:00 957 MW

 16:00 - 17:00 957 MW

 17:00 - 18:00 957 MW

 18:00 - 19:00 957 MW

 19:00 - 20:00 957 MW

 20:00 - 21:00 957 MW

 21:00 - 22:00 957 MW

 22:00 - 23:00 957 MW

 23:00 - 24:00 957 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

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

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. 

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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.

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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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