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Newsletter No 264: Announcement Flextime Auction Etzel ESE Fast Churn RoSY 2025/26 at fixed prices

Uniper Energy Storage GmbH (UST) offers storage capacities in its Etzel ESE storage facility for the residual storage year 2025/2026 at fixed price

Uniper Energy Storage GmbH (UST) offers storage capacities in its Etzel ESE storage facility for the residual storage year 2025/2026 at fixed price.

Etzel ESE Fast Churn RoSY 2025/26
  • Offered capacity: 95 storage bundles are available, each with 20 GWh WGC (in total 1,900 GWh).
  • Bundle structure:
    Firm working gas capacity 17.682 GWh
    Firm withdrawal rate 29.412 MWh/h
    Firm injection rate 27.932 MWh/h
    Interruptible working gas capacity    2.318 GWh
    Interruptible injection rate 3.854 MWh/h
 
  • Flexibility: We have made an adjustment to the curve in Annex I of the storage contract. Customers can use an increased injection rate per bundle on a conditional basis for a limited time. As of contract start date until 15 September 2025, up to 55 MWh/h per bundle will be available. Existing customers must note that their already booked capacity in August will not be additionally available.
     
  • Technical Restrictions: Need to be considered.
     
  • Storage connection: H-Gas market area Trading Hub Europe (THE) and Title Transfer Facility (TTF).
     
  • Duration: Contract start date until 1 April 2026. The setup of new customers can take up to 10 working days.
     
  • Fixed price: Gas storage capacities are offered at a fixed price.
     
  • Flextime period: The auction is planned for execution on a working day between 22 August and 26 August 2025 in the Storage Portal of UST and will be announced with at least 20 hours lead time.
     
  • Terms of participation: Bids can only be submitted via the UST Storage Portal. Please register as an "Advanced User" on time and complete the licensing form in the "My Account" section to participate in the auction.
     
  • Additional information: All relevant information and contract documents are available in our published auction on the UST storage portal. 
     
  • Please note: The Filling Level Regulations have been revised. Please also check the publishments of the German Regulator. Currently 80% 1 November 2025 and 30% 1 February 2026.
For questions or comments, the familiar contacts are available at any time.

We are looking forward to your participation!

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