A source resonator includes a housing having a convex shape. The source resonator is associated with a vehicular electrical charging system used to electrically charge an energy storage device disposed on a vehicle. The source resonator is adapted for attachment to a ground surface with the convex shaped cover extending outwardly away therefrom. The convex shaped cover of the source resonator, when disposed beneath an undercarriage of a vehicle, fills a space intermediate the source resonator and the undercarriage of the vehicle such that animals, such as a dog or a cat, are discouraged from overlyingly residing thereon. External surface segments of the convex shaped cover depend or slope away from a peak point of the convex shaped cover so that foreign objects, like a soda can or a tool that engage the convex shaped cover, may passively slide off of the housing to ensure optimal performance of the source resonator.