A supply charging device includes a supply power connector having a supply housing coupled to a panel having a guide member configured to engage a guide feature of a receive power connector to guide mating. The supply power connector includes a door closing a supply contact chamber holding supply power contacts. The supply charging device includes a float element engaging the panel to allow floating of the supply power connector relative to the panel for aligning the mating end of the supply power connector with the receive power connector. A sealing boot is coupled to the housing and the panel to provide an environmental seal between the supply power connector and the panel. The sealing boot is flexible to maintain sealing as the supply power connector floats relative to the panel.
