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1 December 2014

Electricity storage in the German energy transition

Analysis of the storage required in the power market, ancillary services market and the distribution grid

Key findings

  1. The expansion of renewable energy does not have to wait for electricity storage.

    In the next 10 to 20 years the flexibility required in the power system can be provided for by other, more cost-effective technologies such as flexible power plants, demand side management. New storage is required only at very high shares of renewable energies.

  2. The market for new storage technologies will grow dynamically.

    New markets for battery storage and power to gas technologies are expected to emerge, especially in the transport and chemical sector. Storage developed in these sectors can enable further flexibility for the electricity system as an additional service. Research and development as well as market incentive programs should maximize the system-supporting contribution of new storage technologies.

  3. Storage must receive equal access to markets for flexibility.

    Storage can already today deliver several ancillary services at competitive costs. Flexibility markets – such as the ancillary services or future capacity markets – should therefore be designed such that they are technology-neutral.

  4. Storage should become a tool in the toolbox of distribution system operators.

    In specific cases, storage that is used to support a grid can help to avoid grid expansion in the low-voltage distribution grid. The regulatory framework should enable such cost-efficient decisions.

Bibliographical data

Prof. Michael Sterner, Martin Thema, Fabian Eckert (FENES) Prof. Albert Moser, Dr. Andreas Schäfer, Tim Drees (IAEW) Prof. Christian Rehtanz, Dr. Ulf Häger, Jan Kays, André Seack (ef.Ruhr GmbH) Prof. Dirk Uwe Sauer, Dr. Matthias Leuthold, Philipp Stöcker (ISEA)
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Publication date

1 December 2014

This publication was produced within the framework of the project Storage in the Energiewende.


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