While the capacity of grid batteries is small compared to the other major form of grid storage, pumped hydroelectricity, the battery market is growing very fast as price drops. Relative to 2010, batteries and photovoltaics have followed roughly the same downward price curve due to . Cells are the major cost component, costing 30-40% of a full system.
[pdf] Sodium ion batteries are next-generation solutions for the growing residential solar industry. Many view it as a way to scale energy storage, because, compared to lithium ion technology, it uses widel.
[pdf] The batteries will be installed in four key locations: the Hydropower Plant Perućica (60 MWh), EPCG Željezara Nikšić (two units, 60 MWh each), and the Thermal Power Plant Pljevlja (60 MWh). Additionally, a 5 MWh battery will be installed at the proposed Kapino Polje solar power plant.
[pdf] 
