We store energy
Securing Energy Storage Evolution.
As one of Europe‘s largest gas storage operators, Uniper Energy Storage ensures that energy is available flexibly whenever it is needed.
As an independent company, we offer access to 9 underground gas storage facilities in Germany, Austria and the UK with a total capacity of 80 TWh, which are connected to four market areas.
Gas storage is key to the energy transition
Natural gas forms an important bridge between fossil and climate-friendly energy. The growing share of renewable energies in the energy mix will require the storage of large amounts of energy in the future, because sun and wind are not always available. This green electricity can be transformed into hydrogen by electrolysis and so stored in large gas storage facilities.
With a pioneering spirit and decades of experience, Uniper Energy Storage is pushing to decarbonise the energy industry to ensure security of supply in the future through the storage of natural gas, hydrogen and other green gases.
Our technical and digital expertise is constantly evolving. Together with our customers, we develop innovative products that help them achieve their new energy targets in an environmentally friendly way and design the processes at our natural gas storage facilities to be CO2 neutral.
We empower energy evolution!
Uniper Energy Storage Locations
The 7Fields natural gas storage facility was put into operation in 2011. It is a project jointly conducted by Uniper Energy Storage and RAG Austria, which is co-owner and acts as technical operator. 7Fields is located in Austria, close to the German border. Several former natural gas reservoirs extend across the provinces of Upper Austria and Salzburg and are combined in this point to form a joint storage network. It has a working gas volume of 1.6 billion m³ and is connected via three storage connection points to both the German transport network and the Austrian transmission and distribution network and thus to the market areas THE (Germany) and CEGH (Austria).
This natural gas storage facility has been in operation since 1975 and is one of the largest pore storage facilities in Germany with its 0.8 billion m³ storage volume in 1,500m deep sandstone layers. Uniper Energy Storage owns and operates this storage facility and tends to market its storage capacities on a seasonal basis. The H-gas storage facility is connected to the THE market area (transmission system operator: Open Grid Europe) in the Alpine foothills, so that the natural gas stored here can be traded on Germany's natural gas markets.
Since its commissioning in 1998, the Breitbrunn natural gas storage facility has been one of the largest pore storage facilities in Europe with a total capacity of about 1 billion m³. The storage facility is a cooperation between two companies, NAFTA Speicher and Uniper Energy Storage. NAFTA Speicher is the technical operator of the storage facilities, with the exception of one part of the facility. Uniper Energy Storage is the overall storage operator within the meaning of the Energy Industry Act, acting as a storage system operator and marketing the entire capacity. The H-gas storage facility is connected to the THE market area (transmission system operator: Open Grid Europe) and is thus linked to the natural gas markets in Germany.
The Epe H-gas cavern storage facility went into operation in 1976 with the first 5 caverns. After several expansion stages, 29 caverns with a working gas capacity of 1.8 billion m³ working gas are now in operation. The H-gas storage facility is connected to the THE market area via the OGE network. As KGE's operator, the storage facility manages a further 4 caverns. The Epe H-gas and L-gas storage facilities are operated via a joint compressor station.
The Epe L-gas cavern storage facility was commissioned in 1987. Its 10 caverns represent a total working gas capacity of 500 million m³. Uniper Energy Storage is the sole owner of this L-gas storage. The storage facility is connected to the THE market area (transmission system operator: Open Grid Europe). The Epe H-gas and L-gas storage facilities are operated via a joint compressor station.
The porous rock storage of Eschenfelden has been in operation since October 1967. The special feature of this gas storage facility is, that it is a so-called aquifer storage facility and the porous rock layer, located at a depth of 500-600m underground, is water-filled in its initial state. Only when storage gas is injected is the water displaced from the pore spaces, thus creating an artificial gas reservoir. A total of around 59 million cubic meters of working gas can be withdrawn from the storage facility in one withdrawal period. Uniper Energy Storage is the technical operator and operates this facility together with N-ERGIE, who owns a third part of it. The storage facility is currently no longer marketed for economic reasons.
Between 1989 and 1991, nine oil caverns that had previously been used as part of the strategic oil reserve were converted for gas storage operations. With commissioning in 1993, the original purely Norwegian consortium opened up to the German supply partner Ruhrgas. Today, the Etzel Gas Storage is a joint venture of the three partners Uniper Energy Storage, Equinor Storage Deutschland and Total Etzel Gaslager. Since its beginnings, the operator of the Etzel Gas Storage has been today's Storag Etzel Service. Today, the Etzel gas storage facility has a total of nineteen caverns with a working gas capacity of approx1.2 billion m³. The storage facility is connected to the market area THE (transmission system operator: Open Grid Europe).
The Etzel ESE storage station was commissioned in 2012 and, with 19 connected caverns, is one of the largest cavern storage facilities in Europe. The Etzel ESE natural gas storage facility is a cooperation between the companies Uniper Energy Storage GmbH, MET Germany Holding GmbH, OMV Gas Storage Germany GmbH und VNG Gasspeicher GmbH, with Uniper Energy Storage as the technical operator. The total working gas capacity is approx. 2 billion m³, of which Uniper Energy Storage uses approx. 1.3 billion m³. The H-gas storage facility is connected to the German market area THE (FNB: Open Grid Europe) and, via the Bunde-Etzel pipeline (BEP), to the Dutch TTF, where the most liquid natural gas trading hub in Western Europe is located.
The Holford flexible natural gas storage facility is located 30km southwest of Manchester and can be used to balance short-term fluctuations in demand. Operations began in November 2011 - all eight caverns have been in operation since February 2013. Due to on-site expertise, the storage volume available to customers has been increased twice. The storage facility is wholly owned by Holford Gas Storage Ltd, part of Uniper Energy Storage, and is connected to the National Transmission System's Cheshire Entry Point.
In the Krummhörn natural gas storage facility, hydrogen storage is to be tested on an industrial scale for the first time. The project "Hydrogen Pilot Cavern - HPC" aims to provide information across the entire value chain on how the gas can be stored and how equipment and materials react to hydrogen. The commissioning of the pilot plant with a storage volume of up to 250,000 cubic meters of hydrogen is planned by 2024. The Krummhörn natural gas storage facility is currently not in use for natural gas, as continued operation of the storage facility is not economically viable.
The owner of the Nüttermoor natural gas storage facility is EWE Gas Storage. The storage facility is connected to the Title Transport Facility (TTF) market area in the Netherlands (transmission system operator: Gas Transport Services).
In Falkenhagen, located in the Prignitz district of Brandenburg, we have built the world's first demonstration plant for storing wind power in the natural gas grid. The power-to-gas plant takes in electricity generated by wind turbines and uses an electrolysis process to produce around 360 Nm³/h of green hydrogen, which can be fed into the long-distance gas grid. The green energy is thus flexibly available to the electricity, heat, mobility and industrial markets in the same way as natural gas. In May 2018 the P2G plant was expanded to include methanation as part of the STORE & GO project. In this second step, the regeneratively generated hydrogen is converted into methane (CH4), i.e. synthetic natural gas, using CO2 from a bio-ethanol plant. Currently the plant is not in operation.
The move of Uniper Energy Storage's corporate headquarters to Düsseldorf's “Medienhafen“ in 2019 has succeeded well in organizing the business processes of the central business units even more efficiently. The Float building consists of six "ice floes" that appear to float through the harbour on Franziusstrasse and provide sufficient "open space" for the offices of the Uniper Group companies.
Uniper Energy Storage Austria is the Austrian branch of Uniper Energy Storage GmbH, based in the heart of Vienna. It was founded in April 2011 and represents Uniper Energy Storage in the Austrian energy market. It maintains contacts with its local customers, market partners and government agencies. With its specific knowledge of the Austrian gas market, the Austrian branch supports the sale as well as the business development of storage services with a special focus on the 7Fields storage facility.