A unit of British engineering company Rolls-Royce Holdings Plc (<a href="https://www.londonstockexchange.com/stock/RR./rolls-royce-holdings-plc/company-page" target="_blank">LON:RR</a>) announced today that it has secured a contract to deliver 80 MW/160 MWh of battery energy storage systems (BESS) in Latvia to support substations of local transmission system operator AST.