An electrical supply apparatus including a containment unit with a bottom, at least one side wall forming an enclosure with an open top; a tower extendable and retractable from the containment unit and a charging unit attached to the tower which, in preferred embodiments, is a wireless charging component provided in a cover, for charging electric vehicles, and particularly to induce optimal current transfer to a receiving component without requiring a corresponding extension of the receiving component out of an electric vehicle and featuring a flexible bellows having an upper edge and a lower edge, wherein said upper edge is continuously affixed about said cover and a lower edge is continuously attached to a flange forming the bottom of the crown ring such that said bellows provides a watertight barrier preventing contaminants from entering an area under said cover.