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Annual Report

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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

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Attachments

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.

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. 

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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