Uniper Energy Storage GmbH (UST) offers storage capacities in its Etzel ESE storage facility for storage year 2026/2027 with indexed price.

Etzel ESE Fast Churn Indexed Product:

• Duration: 1 storage year, 1 April 2026 until 1 April 2027
   
• Offered capacity: 11 storage bundles are available, each with 250 GWh WGC (in total 2.75 TWh).
   
• Bundle structure:

  Firm working gas capacity	221.025 GWh
  Firm withdrawal rate	367.650 MWh/h
  Firm injection rate	349.150 MWh/h
  Interruptible working gas capacity	28.975 GWh
  Interruptible injection rate	48.175 MWh/h

   
• Flexibility: This storage product allows for flexible operations with an injection period of 35 days and a withdrawal period of 34 days, resulting in a Churn Rate of 5.29.
   
• Technical restrictions: Need to be considered. Please see Annex I and Annex II of storage contract.
   
• Storage connection: H-Gas market area Trading Hub Europe (THE) and Title Transfer Facility (TTF). Please note that the document Supplemental Agreement Oude was updated for the optional connection to TTF.
   
• Indexed price: QWiQ3i: (Quarter 4 2026 or Quarter 1 2027) - Quarter 3 2026-Spread used to calculate a particular tranche price.
   
• Variable Costs: Please consider reduced variable costs to 0 €/MWh for the first churn of the product valid until 1 August 2026. See storage contract Articel 3 section 5 for more details.
   
• Timing: Auctions runs on 26 March 2026 between 11 and 12 hours in Storage Portal of UST.
   
• 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 publications of the German Regulator. Currently, the limits for this storage are 80% on November 1, 2026 and 30% on February 1, 2027.
   

For questions or comments, the familiar contacts are available at any time.

We are looking forward to your participation!