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Fortum is launching the Nordic countries’ biggest electricity storage pilot project incorporating Saft’s megawatt-scale Li-ion (lithium-ion) battery energy storage technology. The objective is to research the suitability of batteries used for storing electricity to maintain a power balance in the electricity system. Additionally, the research will explore new opportunities offered by electricity storage and by the flexible intermediate storage of electricity. For the project, Saft’s Li-ion containerised battery system with a nominal output of 2 megawatts (MW) and 1 megawatt hour (MWh) of energy capacity will be installed at Fortum’s Suomenoja power plant in Finland.

The battery project is an extension of Fortum’s pioneering experiment started in March in which a virtual power plant based on demand flexibility is being built together with customers. The capacity of this power plant will be offered to the national grid company Fingrid to maintain a continuous power balance in the electricity system.

The planning of the Suomenoja battery project has been started, and the aim is to start the installation work during September 2016. Test use of the electricity storage is estimated to begin in October. The battery will be supplied by Saft, the world leader in the design and manufacture of advanced technology batteries for industrial applications. The project’s investment cost is about two million euros, for which Fortum will receive a 30 per cent energy investment subsidy from the Ministry of Employment and the Economy.


Lithium-ion Battery


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