Mc4 connectors are used to connect multiple solar panels or groups of solar panels together in a solar field, and typically used in parallel applications. The metal pin is made from high quality machined copper and sealed tip that can ensure excellent electrical contact. Mc4 connectors have an IP67 rating. It means they're waterproof and dustproof. Mc4 connectors perform well with both 4mm and 6mm solar wires.

MC4 connectors are single-contact electrical connectors commonly used for connecting solar panels. MC4s allow strings of panels to be easily constructed by pushing the connectors from adjacent panels together by hand, but require a tool to disconnect them to ensure they do not accidentally disconnect when the cables are pulled.