Bi-metallic lugs are specially designed to connect aluminum conductors to copper bus bars, tackling the challenges that come with using either pure copper or pure aluminum lugs in mixed-metal systems. While pure copper lugs are perfect for copper-to-copper connections, offering great conductivity and mechanical strength, bi-metallic lugs help prevent galvanic corrosion that can happen... https://www.pioneerpowers.com/bimetallic-lugs-and-connectors.php