The disclosure relates to the use of a composite material as electro-thermal material in a process for the production of an electrical heating panel, wherein the electrical heating panel comprises at least one device selected from a plate, a sheet or a film, wherein said device has one or more layers wherein at least one layer is a heating layer made of a composite material comprising a first polymer which is one or more amorphous polymers or one or more semi-crystalline polymers selected from polyethylene and/or polypropylene; and from 2.0 to 20.0 wt. % of carbon particles and wherein the heating layer or at least one heating layer has a thickness ranging from 100 μm to 4.0 mm. The disclosure also relates to the use of such electrical heating panel in a motor vehicle.