The invention relates to a portable electrical device for melting snow and ice that has accumulated on the surface of a vehicle. The first strut is received along a first side of the panel and the second strut is received along a second side of the panel, the second side opposing the first side. The present invention provides means for introducing the connecting means inside the case, and means for establishing the electrical connection between said connecting means and bump contacts of the first electric module, via compression, when the two portions of the case are mounted.