PUTO maintenance 15/06/2026
Please be informed that PUTO will be unavailable due to a maintenance from 19:00 to 19:30 CEST today (15/06/ 2026 ).
We would like to apologies for any inconvenience this may have caused.
Thank you.
JAO Operations
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.
- 500+Registered market participants
- 26k+Auctions held annually
- 100%Auction tool availability
- 80+Employees
- 50TSOs serviced
Resource Center
This section contains key information for market participants such as user guides, forms, auction rules, nomination deadlines and other documents.
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.
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.
Do you need support?
If you can't find an answer to your question, our team is here to help!