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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

Publication Tool Maintenance

by JAO

Dear All,

Please be informed that the Publication Tool will now being undergoing a brief maintenance period.

Expected downtime: up to 1 hour  

Thank you for your understanding.

Kind regards,

JAO Operations

Ukraine – Slovakia Intraday Auctions Go-Live

by JAO

Dear Market Participants,

We would like to inform you that explicit intraday auctions on the Ukraine – Slovakia (UA<>SK) border will go live on JAO’s allocation platform for delivery day 12 November 2026.

The first auction (ID1) will take place on 11 November 2026, with bidding open from 16:45 to 17:00 CET.

The auctions are governed by the Rules for intraday capacity allocation on Ukrainian borders, including Annex 2 – Border specific annex for Ukraine – Slovakia, available on our website: Rules for intraday capacity allocation on Ukrainian borders.

Auction set-up:

•             Hourly Physical Transmission Rights in both directions (UA-SK and SK-UA), allocated in two daily auctions:

◦             ID1 – hours 00:00–24:00 of D: bidding D-1 16:45–17:00 CET

◦             ID2 – hours 12:00–24:00 of D: bidding D 08:45–09:00 CET

•             Offered capacity is published by 16:42 (ID1) and 08:42 (ID2).

•             Allocated rights are subject to the Use-It-Or-Lose-It principle, without compensation for non-nominated capacity.

Registration:

•             Market Participants already registered with JAO: please download the latest version of the Amendment to the Participation Agreement from our website (Documents > Resource Center > Registration > Registration and Modification Forms: https://www.jao.eu/resource-center/registration), select the Ukraine – Slovakia border under the Rules for intraday capacity allocation on Ukrainian borders, and submit the signed Amendment via JAO Support Hub (support.jao.eu) to receive entitlements.

•             New Market Participants: please select the above rules and border during registration via JAO Support Hub (support.jao.eu).

To participate in the auctions, Market Participants must hold either:

•             an Agreement on the settlement of imbalances with NPC Ukrenergo; or

•             a Framework Agreement on Electricity Transmission through Connecting Lines with SEPS and an Agreement on Settlement of Imbalances with OKTE.

Please ensure sufficient collaterals are in place ahead of the first auction.

Should you have any questions, please contact us via JAO Support Hub (support.jao.eu).

Kind regards,

JAO Operations

Capacity Curtailment on the NSL-GB-N2 border for delivery period 04-11-2026

by JAO

1. TSO(s)*:

NGNSL_IC

2. Identification of affected Long Term Transmission Rights:

NSL-GB-N2

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

04-11-2026 17:00 - 18:00 98 MW

04-11-2026 18:00 - 19:00 98 MW

04-11-2026 19:00 - 20:00 98 MW

04-11-2026 20:00 - 21:00 98 MW

04-11-2026 21:00 - 22:00 98 MW

5. Amount of LTTR remaining after curtailment:

04-11-2026 17:00 - 18:00 0 MW

04-11-2026 18:00 - 19:00 0 MW

04-11-2026 19:00 - 20:00 0 MW

04-11-2026 20:00 - 21:00 0 MW

04-11-2026 21:00 - 22:00 15 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)*?

NTC restrictions

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

Capacity Curtailment on the IT-AT border for delivery period 04-11-2026

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

IT-AT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

04-11-2026 07:00 - 08:00 108 MW

04-11-2026 08:00 - 09:00 108 MW

04-11-2026 09:00 - 10:00 108 MW

04-11-2026 10:00 - 11:00 108 MW

04-11-2026 11:00 - 12:00 108 MW

04-11-2026 12:00 - 13:00 108 MW

04-11-2026 13:00 - 14:00 108 MW

04-11-2026 14:00 - 15:00 108 MW

04-11-2026 15:00 - 16:00 108 MW

04-11-2026 16:00 - 17:00 108 MW

04-11-2026 17:00 - 18:00 108 MW

04-11-2026 18:00 - 19:00 108 MW

04-11-2026 19:00 - 20:00 108 MW

04-11-2026 20:00 - 21:00 108 MW

04-11-2026 21:00 - 22:00 108 MW

04-11-2026 22:00 - 23:00 108 MW

04-11-2026 23:00 - 24:00 108 MW

5. Amount of LTTR remaining after curtailment:

04-11-2026 07:00 - 08:00 89 MW

04-11-2026 08:00 - 09:00 7 MW

04-11-2026 09:00 - 10:00 7 MW

04-11-2026 10:00 - 11:00 7 MW

04-11-2026 11:00 - 12:00 7 MW

04-11-2026 12:00 - 13:00 7 MW

04-11-2026 13:00 - 14:00 7 MW

04-11-2026 14:00 - 15:00 7 MW

04-11-2026 15:00 - 16:00 7 MW

04-11-2026 16:00 - 17:00 7 MW

04-11-2026 17:00 - 18:00 7 MW

04-11-2026 18:00 - 19:00 7 MW

04-11-2026 19:00 - 20:00 7 MW

04-11-2026 20:00 - 21:00 7 MW

04-11-2026 21:00 - 22:00 7 MW

04-11-2026 22:00 - 23:00 7 MW

04-11-2026 23:00 - 24:00 37 MW

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

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

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

Capacity Curtailment on the AT-IT border for delivery period 04-11-2026

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

AT-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

04-11-2026 00:00 - 01:00 344 MW

04-11-2026 01:00 - 02:00 344 MW

04-11-2026 02:00 - 03:00 344 MW

04-11-2026 03:00 - 04:00 344 MW

04-11-2026 04:00 - 05:00 344 MW

04-11-2026 05:00 - 06:00 344 MW

04-11-2026 06:00 - 07:00 344 MW

04-11-2026 07:00 - 08:00 344 MW

04-11-2026 08:00 - 09:00 344 MW

04-11-2026 09:00 - 10:00 344 MW

04-11-2026 10:00 - 11:00 344 MW

04-11-2026 11:00 - 12:00 344 MW

04-11-2026 12:00 - 13:00 344 MW

04-11-2026 13:00 - 14:00 344 MW

04-11-2026 14:00 - 15:00 344 MW

04-11-2026 15:00 - 16:00 344 MW

04-11-2026 16:00 - 17:00 344 MW

04-11-2026 17:00 - 18:00 344 MW

04-11-2026 18:00 - 19:00 344 MW

04-11-2026 19:00 - 20:00 344 MW

04-11-2026 20:00 - 21:00 344 MW

04-11-2026 21:00 - 22:00 344 MW

04-11-2026 22:00 - 23:00 344 MW

04-11-2026 23:00 - 24:00 344 MW

5. Amount of LTTR remaining after curtailment:

04-11-2026 00:00 - 01:00 285 MW

04-11-2026 01:00 - 02:00 285 MW

04-11-2026 02:00 - 03:00 285 MW

04-11-2026 03:00 - 04:00 285 MW

04-11-2026 04:00 - 05:00 285 MW

04-11-2026 05:00 - 06:00 285 MW

04-11-2026 06:00 - 07:00 285 MW

04-11-2026 07:00 - 08:00 173 MW

04-11-2026 08:00 - 09:00 69 MW

04-11-2026 09:00 - 10:00 69 MW

04-11-2026 10:00 - 11:00 69 MW

04-11-2026 11:00 - 12:00 69 MW

04-11-2026 12:00 - 13:00 69 MW

04-11-2026 13:00 - 14:00 69 MW

04-11-2026 14:00 - 15:00 69 MW

04-11-2026 15:00 - 16:00 69 MW

04-11-2026 16:00 - 17:00 69 MW

04-11-2026 17:00 - 18:00 69 MW

04-11-2026 18:00 - 19:00 69 MW

04-11-2026 19:00 - 20:00 69 MW

04-11-2026 20:00 - 21:00 69 MW

04-11-2026 21:00 - 22:00 69 MW

04-11-2026 22:00 - 23:00 69 MW

04-11-2026 23:00 - 24:00 67 MW

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

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

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

Capacity Curtailment on the GR-IT border for delivery period 04-11-2026

by JAO

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:

04-11-2026 00:00 - 01:00 499 MW

04-11-2026 01:00 - 02:00 499 MW

04-11-2026 02:00 - 03:00 499 MW

04-11-2026 03:00 - 04:00 499 MW

04-11-2026 04:00 - 05:00 499 MW

04-11-2026 05:00 - 06:00 499 MW

04-11-2026 06:00 - 07:00 499 MW

04-11-2026 07:00 - 08:00 499 MW

04-11-2026 08:00 - 09:00 499 MW

04-11-2026 09:00 - 10:00 499 MW

04-11-2026 10:00 - 11:00 499 MW

04-11-2026 11:00 - 12:00 499 MW

04-11-2026 12:00 - 13:00 499 MW

04-11-2026 13:00 - 14:00 499 MW

04-11-2026 14:00 - 15:00 499 MW

04-11-2026 15:00 - 16:00 499 MW

04-11-2026 16:00 - 17:00 499 MW

04-11-2026 17:00 - 18:00 499 MW

04-11-2026 18:00 - 19:00 499 MW

04-11-2026 19:00 - 20:00 499 MW

04-11-2026 20:00 - 21:00 499 MW

04-11-2026 21:00 - 22:00 499 MW

04-11-2026 22:00 - 23:00 499 MW

04-11-2026 23:00 - 24:00 499 MW

5. Amount of LTTR remaining after curtailment:

04-11-2026 00:00 - 01:00 0 MW

04-11-2026 01:00 - 02:00 0 MW

04-11-2026 02:00 - 03:00 0 MW

04-11-2026 03:00 - 04:00 0 MW

04-11-2026 04:00 - 05:00 0 MW

04-11-2026 05:00 - 06:00 0 MW

04-11-2026 06:00 - 07:00 0 MW

04-11-2026 07:00 - 08:00 0 MW

04-11-2026 08:00 - 09:00 0 MW

04-11-2026 09:00 - 10:00 0 MW

04-11-2026 10:00 - 11:00 0 MW

04-11-2026 11:00 - 12:00 0 MW

04-11-2026 12:00 - 13:00 0 MW

04-11-2026 13:00 - 14:00 0 MW

04-11-2026 14:00 - 15:00 0 MW

04-11-2026 15:00 - 16:00 0 MW

04-11-2026 16:00 - 17:00 0 MW

04-11-2026 17:00 - 18:00 0 MW

04-11-2026 18:00 - 19:00 0 MW

04-11-2026 19:00 - 20:00 0 MW

04-11-2026 20:00 - 21:00 0 MW

04-11-2026 21:00 - 22:00 0 MW

04-11-2026 22:00 - 23:00 0 MW

04-11-2026 23:00 - 24:00 0 MW

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

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

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

Capacity Curtailment on the IT-GR border for delivery period 04-11-2026

by JAO

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:

04-11-2026 00:00 - 01:00 500 MW

04-11-2026 01:00 - 02:00 500 MW

04-11-2026 02:00 - 03:00 500 MW

04-11-2026 03:00 - 04:00 500 MW

04-11-2026 04:00 - 05:00 500 MW

04-11-2026 05:00 - 06:00 500 MW

04-11-2026 06:00 - 07:00 500 MW

04-11-2026 07:00 - 08:00 500 MW

04-11-2026 08:00 - 09:00 500 MW

04-11-2026 09:00 - 10:00 500 MW

04-11-2026 10:00 - 11:00 500 MW

04-11-2026 11:00 - 12:00 500 MW

04-11-2026 12:00 - 13:00 500 MW

04-11-2026 13:00 - 14:00 500 MW

04-11-2026 14:00 - 15:00 500 MW

04-11-2026 15:00 - 16:00 500 MW

04-11-2026 16:00 - 17:00 500 MW

04-11-2026 17:00 - 18:00 500 MW

04-11-2026 18:00 - 19:00 500 MW

04-11-2026 19:00 - 20:00 500 MW

04-11-2026 20:00 - 21:00 500 MW

04-11-2026 21:00 - 22:00 500 MW

04-11-2026 22:00 - 23:00 500 MW

04-11-2026 23:00 - 24:00 500 MW

5. Amount of LTTR remaining after curtailment:

04-11-2026 00:00 - 01:00 0 MW

04-11-2026 01:00 - 02:00 0 MW

04-11-2026 02:00 - 03:00 0 MW

04-11-2026 03:00 - 04:00 0 MW

04-11-2026 04:00 - 05:00 0 MW

04-11-2026 05:00 - 06:00 0 MW

04-11-2026 06:00 - 07:00 0 MW

04-11-2026 07:00 - 08:00 0 MW

04-11-2026 08:00 - 09:00 0 MW

04-11-2026 09:00 - 10:00 0 MW

04-11-2026 10:00 - 11:00 0 MW

04-11-2026 11:00 - 12:00 0 MW

04-11-2026 12:00 - 13:00 0 MW

04-11-2026 13:00 - 14:00 0 MW

04-11-2026 14:00 - 15:00 0 MW

04-11-2026 15:00 - 16:00 0 MW

04-11-2026 16:00 - 17:00 0 MW

04-11-2026 17:00 - 18:00 0 MW

04-11-2026 18:00 - 19:00 0 MW

04-11-2026 19:00 - 20:00 0 MW

04-11-2026 20:00 - 21:00 0 MW

04-11-2026 21:00 - 22:00 0 MW

04-11-2026 22:00 - 23:00 0 MW

04-11-2026 23:00 - 24:00 0 MW

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

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

*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. 

ISO_logo_new
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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