Mannum’s $130 million energy project complete 20/10/2025 FacebookTwitterEmail The Mannum battery energy storage system (BESS) project has officially commenced commercial operations. (Supplied) Epic Energy has commenced commercial operations at its 100MV/200MWh battery energy storage system (BESS) in Mannum, marking the completion of […] Subscribe or Login to see the rest of the content. Username Password * Remember Me Forgot Password