In Fortum’s Batcave battery project, the Nordic countries’ biggest lithium-ion battery storage was installed in conjunction with Fortum’s biomass-fired biopower plant in Järvenpää. The flexibility brought by a battery storage enables growth in the use of renewable energy sources in Finland.
The Batcave battery’s nominal output is 2MW and the energy capacity 1MWh. The battery consists of approximately 6,600 lithium-ion cells, and it offers quick, second- and minute-level grid flexibility in frequency regulation. The Batcave name refers to “battery cave”, a construction container equipped with the latest battery technology and created as a test environment for new ideas. The battery project complements Fortum’s research on other future solutions, such as demand response and virtual power plants.
