Bimetal lugs are specially designed connectors used to connect aluminum conductors to copper bus bars or terminals. Direct contact between aluminum and copper causes galvanic corrosion and poor conductivity, hence bi-metal lugs are the safest and most efficient means to get such connections. Proper installation, to ensure reliable long-term performance, is critical. Installation I... https://www.pioneerpowers.com/bimetallic-lugs-and-connectors.php