Public auctions

Public Auctions for the Sale of Electricity Produced at TEŠ and the Purchase of Emission Allowances for the Operation of TEŠ

The company Borzen, through its Centre for RES/CHP support, was, in accordance with the third paragraph of Article 9 and the second paragraph of Article 36 of the Act on Transitional Financing of the Accelerated and Fair Exit from Coal (Official Gazette of the Republic of Slovenia, No. 109/2024, dated 20 December 2024), appointed to conduct the operational implementation of public auctions for the sale of electricity produced at the Šoštanj Thermal Power Plant (TEŠ) and the purchase of emission allowances required for its operation.

This ensures a transparent, impartial, and efficient process for selling electricity and purchasing the required number of emission allowances, thus enabling the uninterrupted operation of TEŠ in accordance with the aforementioned law.

The auction procedures rules are defined in the following documents:

• General Rules for Public Auctions for the Sale of Electricity Produced by TEŠ, and
• General Rules for Public Auctions for the Purchase of Emission Allowances for the Operation of TEŠ.

Results of the public auctions, cunducted on September 17, 2025

• Results of the public auction for the sale of electricity

• Results of the public auction for the purchase of emission allowances

More information ob both auctions: Public auctions for electricity from TEŠ 2026 | Borzen

Public Auction Announcements

Registered companies and the general public will be informed of upcoming auctions—including the date, schedule, products and quantities, and other relevant details—at least 8 working days in advance.

Upcoming Auction Dates

Currently, two auction rounds are planned until the end of 2025. 

Conditions for Participation and Auction Registration

To participate in a specific public auction, companies must meet the following conditions:

1. Registration

Companies interested in participating must complete a one-time registration, which enables participation in all future auctions of the same type. Separate registrations are required for Electricity sale auctions, and Emission allowance purchase auctions. If the company meets the criteria, it may register for both types of auctions.

Registration requirements

• for electricity sale auctions:
  • Membership in the Slovenian balance scheme, either as a balance group responsible party or a balance subgroup responsible party,
  • A completed and signed registration form.
• for emission allowance purchase auctions:
  • An extract from the business or court register (not older than 30 days),
  • Full and active membership on one of the following exchanges: ICE Endex  or EEX,
  • A completed and signed registration form.

2. Financial Guarantee

To participate in a specific public auction, the registered company must submit a financial guarantee to secure the seriousness of the offer by the published deadline.

Forms

• for electricity sale auctions:
  • Registration form
  • Sample of bank guarantee for the seriousness of the bid
  • Sample of bank guarantee for the good performance
  • Irrevocable power of attorney
• for emission allowance purchase auctions:
  • Registration form
  • Declaration of membership on organised markets
  • Sample of bank guarantee for the seriousness of the bid
  • Sample of bank guarantee for the good performance
  • Irrevocable power of attorney

Results of finished auctions

In accordance with the aforementioned law, two public auction rounds have already been carried out in 2025. Details of these auctions are available on the links below:

• Results of the first public auction for the sale of electricity produced at the Šoštanj Thermal Power Plant and public auction for the purchase of emission allowances for the needs of the operation of TEŠ in 2026
• Results of the public auction for the sale of electricity produced at the Šoštanj Thermal Power Plant and public auction for the purchase of emission allowances for the needs of the operation of TEŠ in 2025