A battery energy storage system (BESS) described as the largest deployed to date in the European Union (EU) has been commissioned in Bulgaria. Officials with the country's Ministry of Energy said the 124-MW/496.2-MWh BESS, also the largest in the Balkans, supports the stability of Bulgaria's power grid along with its transition to the use of more renewable energy resources.The post EU's Largest BESS Project Now Online in Bulgaria appeared first on POWER Magazine.