The MC4 Style Solar Connector Kit provides all the components needed to make one MC4 connection used in the installation of REDARC Monocrystalline Solar Panels and REDARC Monocrystalline Folding Solar Panels.. It connects Positive and Negative cables from two solar panels into two output for parallel connection to a regulator.. Compatible with MC4 Solar connectors. Required for multiple solar panel installations. .