Controller Protection Circuit for Solar Cell Connected to Charge a Battery

A protective interconnection circuit for interconnecting a solar panel, a battery and a charge controller. One embodiment has a pair of post-mate, mating electrical connectors. The connectors have at least two primary conduction paths through the joined connectors and a first set of at least two auxiliary conduction paths through the joined connectors. The primary conduction paths electrically connect the battery to the charge controller. The auxiliary conduction paths of the battery side connector are connected together. The auxiliary conduction paths of the controller side connector are connected one to the solar panel and the other to the charge controller. Another embodiment has a relay with its coil terminals electrically connected the controller's battery terminals. The relay contacts are interposed in a conductive connection between the solar panel and the controller.