Annual Report 2025 Cover Image
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 IF1-GB-FR border for delivery period 15-10-2026

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:

15-10-2026 00:00 - 01:00 1299 MW

15-10-2026 01:00 - 02:00 1299 MW

15-10-2026 02:00 - 03:00 1299 MW

15-10-2026 03:00 - 04:00 1299 MW

15-10-2026 04:00 - 05:00 1299 MW

15-10-2026 05:00 - 06:00 1299 MW

15-10-2026 06:00 - 07:00 1299 MW

15-10-2026 07:00 - 08:00 1299 MW

15-10-2026 08:00 - 09:00 1299 MW

15-10-2026 09:00 - 10:00 1299 MW

15-10-2026 10:00 - 11:00 1299 MW

15-10-2026 11:00 - 12:00 1299 MW

15-10-2026 12:00 - 13:00 1299 MW

15-10-2026 13:00 - 14:00 1299 MW

15-10-2026 14:00 - 15:00 1299 MW

15-10-2026 15:00 - 16:00 1299 MW

15-10-2026 16:00 - 17:00 1299 MW

15-10-2026 17:00 - 18:00 1299 MW

15-10-2026 18:00 - 19:00 1299 MW

15-10-2026 19:00 - 20:00 1299 MW

15-10-2026 20:00 - 21:00 1299 MW

15-10-2026 21:00 - 22:00 1299 MW

15-10-2026 22:00 - 23:00 1299 MW

15-10-2026 23:00 - 24:00 1299 MW

5. Amount of LTTR remaining after curtailment:

15-10-2026 00:00 - 01:00 957 MW

15-10-2026 01:00 - 02:00 957 MW

15-10-2026 02:00 - 03:00 957 MW

15-10-2026 03:00 - 04:00 957 MW

15-10-2026 04:00 - 05:00 957 MW

15-10-2026 05:00 - 06:00 957 MW

15-10-2026 06:00 - 07:00 957 MW

15-10-2026 07:00 - 08:00 957 MW

15-10-2026 08:00 - 09:00 957 MW

15-10-2026 09:00 - 10:00 957 MW

15-10-2026 10:00 - 11:00 957 MW

15-10-2026 11:00 - 12:00 957 MW

15-10-2026 12:00 - 13:00 957 MW

15-10-2026 13:00 - 14:00 957 MW

15-10-2026 14:00 - 15:00 957 MW

15-10-2026 15:00 - 16:00 957 MW

15-10-2026 16:00 - 17:00 957 MW

15-10-2026 17:00 - 18:00 957 MW

15-10-2026 18:00 - 19:00 957 MW

15-10-2026 19:00 - 20:00 957 MW

15-10-2026 20:00 - 21:00 957 MW

15-10-2026 21:00 - 22:00 957 MW

15-10-2026 22:00 - 23:00 957 MW

15-10-2026 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

Capacity Curtailment on the BG-GR border for delivery period 04-10-2026

by JAO

1. TSO(s)*:

HTSO-TSO

2. Identification of affected Long Term Transmission Rights:

BG-GR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

04-10-2026 07:00 - 08:00 899 MW

04-10-2026 08:00 - 09:00 899 MW

04-10-2026 09:00 - 10:00 899 MW

04-10-2026 10:00 - 11:00 899 MW

04-10-2026 11:00 - 12:00 899 MW

04-10-2026 12:00 - 13:00 899 MW

04-10-2026 13:00 - 14:00 899 MW

04-10-2026 14:00 - 15:00 899 MW

04-10-2026 15:00 - 16:00 899 MW

04-10-2026 16:00 - 17:00 899 MW

04-10-2026 17:00 - 18:00 899 MW

04-10-2026 18:00 - 19:00 899 MW

5. Amount of LTTR remaining after curtailment:

04-10-2026 07:00 - 08:00 674 MW

04-10-2026 08:00 - 09:00 674 MW

04-10-2026 09:00 - 10:00 674 MW

04-10-2026 10:00 - 11:00 674 MW

04-10-2026 11:00 - 12:00 674 MW

04-10-2026 12:00 - 13:00 674 MW

04-10-2026 13:00 - 14:00 674 MW

04-10-2026 14:00 - 15:00 674 MW

04-10-2026 15:00 - 16:00 674 MW

04-10-2026 16:00 - 17:00 674 MW

04-10-2026 17:00 - 18:00 674 MW

04-10-2026 18:00 - 19:00 674 MW

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

Urgent maintenance of the 400 kV tie-line Skopje 5 – Uroševac.

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 BG-GR border for delivery period 03-10-2026

by JAO

1. TSO(s)*:

HTSO-TSO

2. Identification of affected Long Term Transmission Rights:

BG-GR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

03-10-2026 07:00 - 08:00 899 MW

03-10-2026 08:00 - 09:00 899 MW

03-10-2026 09:00 - 10:00 899 MW

03-10-2026 10:00 - 11:00 899 MW

03-10-2026 11:00 - 12:00 899 MW

03-10-2026 12:00 - 13:00 899 MW

03-10-2026 13:00 - 14:00 899 MW

03-10-2026 14:00 - 15:00 899 MW

03-10-2026 15:00 - 16:00 899 MW

03-10-2026 16:00 - 17:00 899 MW

03-10-2026 17:00 - 18:00 899 MW

03-10-2026 18:00 - 19:00 899 MW

5. Amount of LTTR remaining after curtailment:

03-10-2026 07:00 - 08:00 674 MW

03-10-2026 08:00 - 09:00 674 MW

03-10-2026 09:00 - 10:00 674 MW

03-10-2026 10:00 - 11:00 674 MW

03-10-2026 11:00 - 12:00 674 MW

03-10-2026 12:00 - 13:00 674 MW

03-10-2026 13:00 - 14:00 674 MW

03-10-2026 14:00 - 15:00 674 MW

03-10-2026 15:00 - 16:00 674 MW

03-10-2026 16:00 - 17:00 674 MW

03-10-2026 17:00 - 18:00 674 MW

03-10-2026 18:00 - 19:00 674 MW

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

Urgent maintenance of the 400 kV tie-line Skopje 5 – Uroševac.

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 GR-BG border for delivery period 04-10-2026

by JAO

1. TSO(s)*:

HTSO-TSO

2. Identification of affected Long Term Transmission Rights:

GR-BG

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

04-10-2026 07:00 - 08:00 700 MW

04-10-2026 08:00 - 09:00 700 MW

04-10-2026 09:00 - 10:00 700 MW

04-10-2026 10:00 - 11:00 700 MW

04-10-2026 11:00 - 12:00 700 MW

04-10-2026 12:00 - 13:00 700 MW

04-10-2026 13:00 - 14:00 700 MW

04-10-2026 14:00 - 15:00 700 MW

04-10-2026 15:00 - 16:00 700 MW

04-10-2026 16:00 - 17:00 700 MW

04-10-2026 17:00 - 18:00 700 MW

04-10-2026 18:00 - 19:00 700 MW

5. Amount of LTTR remaining after curtailment:

04-10-2026 07:00 - 08:00 483 MW

04-10-2026 08:00 - 09:00 483 MW

04-10-2026 09:00 - 10:00 483 MW

04-10-2026 10:00 - 11:00 483 MW

04-10-2026 11:00 - 12:00 483 MW

04-10-2026 12:00 - 13:00 483 MW

04-10-2026 13:00 - 14:00 483 MW

04-10-2026 14:00 - 15:00 483 MW

04-10-2026 15:00 - 16:00 483 MW

04-10-2026 16:00 - 17:00 483 MW

04-10-2026 17:00 - 18:00 483 MW

04-10-2026 18:00 - 19:00 483 MW

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

Urgent maintenance of the 400 kV tie-line Skopje 5 – Uroševac.

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 GR-BG border for delivery period 03-10-2026

by JAO

1. TSO(s)*:

HTSO-TSO

2. Identification of affected Long Term Transmission Rights:

GR-BG

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

03-10-2026 07:00 - 08:00 700 MW

03-10-2026 08:00 - 09:00 700 MW

03-10-2026 09:00 - 10:00 700 MW

03-10-2026 10:00 - 11:00 700 MW

03-10-2026 11:00 - 12:00 700 MW

03-10-2026 12:00 - 13:00 700 MW

03-10-2026 13:00 - 14:00 700 MW

03-10-2026 14:00 - 15:00 700 MW

03-10-2026 15:00 - 16:00 700 MW

03-10-2026 16:00 - 17:00 700 MW

03-10-2026 17:00 - 18:00 700 MW

03-10-2026 18:00 - 19:00 700 MW

5. Amount of LTTR remaining after curtailment:

03-10-2026 07:00 - 08:00 483 MW

03-10-2026 08:00 - 09:00 483 MW

03-10-2026 09:00 - 10:00 483 MW

03-10-2026 10:00 - 11:00 483 MW

03-10-2026 11:00 - 12:00 483 MW

03-10-2026 12:00 - 13:00 483 MW

03-10-2026 13:00 - 14:00 483 MW

03-10-2026 14:00 - 15:00 483 MW

03-10-2026 15:00 - 16:00 483 MW

03-10-2026 16:00 - 17:00 483 MW

03-10-2026 17:00 - 18:00 483 MW

03-10-2026 18:00 - 19:00 483 MW

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

Urgent maintenance of the 400 kV tie-line Skopje 5 – Uroševac.

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 DK-NL border for delivery period 03-10-2026

by JAO

1. TSO(s)*:

TenneT_NL

2. Identification of affected Long Term Transmission Rights:

DK-NL

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

03-10-2026 08:00 - 09:00 199 MW

03-10-2026 09:00 - 10:00 199 MW

03-10-2026 10:00 - 11:00 199 MW

03-10-2026 11:00 - 12:00 199 MW

03-10-2026 12:00 - 13:00 199 MW

03-10-2026 13:00 - 14:00 199 MW

03-10-2026 14:00 - 15:00 199 MW

03-10-2026 15:00 - 16:00 199 MW

03-10-2026 16:00 - 17:00 199 MW

5. Amount of LTTR remaining after curtailment:

03-10-2026 08:00 - 09:00 0 MW

03-10-2026 09:00 - 10:00 0 MW

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

03-10-2026 11:00 - 12:00 0 MW

03-10-2026 12:00 - 13:00 0 MW

03-10-2026 13:00 - 14:00 0 MW

03-10-2026 14:00 - 15:00 0 MW

03-10-2026 15:00 - 16:00 0 MW

03-10-2026 16:00 - 17:00 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)*?

The remedial actions considered were assessed as not sufficient or ineffective to avoid the expected violation of operational security limit(s).

Capacity Curtailment on the ME-IT border for delivery period 03-10-2026

by JAO

1. TSO(s)*:

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:

03-10-2026 10:00 - 11:00 400 MW

03-10-2026 11:00 - 12:00 400 MW

03-10-2026 12:00 - 13:00 400 MW

03-10-2026 13:00 - 14:00 400 MW

03-10-2026 14:00 - 15:00 400 MW

03-10-2026 15:00 - 16:00 400 MW

5. Amount of LTTR remaining after curtailment:

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

03-10-2026 11:00 - 12:00 0 MW

03-10-2026 12:00 - 13:00 0 MW

03-10-2026 13:00 - 14:00 0 MW

03-10-2026 14:00 - 15:00 0 MW

03-10-2026 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

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