which they are pivoted into the housing 8 in the case of this exemplary embodiment the batteries 15 are thus recharged via the solar cells 5 and via the batteries 15 and an electronic system that is not illustrated and assigned to the solar collector 4 the external electrical devices operated in fig7 and 8 a configuration of the solar collector 4 that is modified with respect to the exemplary embodiment according to fig3 to 6 and a modified connection of solar collector 4 and parcel shelf 3 illustrated parts of the two exemplary embodiments which correspond in construction or in the mode of operation are marked with the same reference numbers for the sake of simplicity the exemplary embodiment according to fig7 and 8 differs from that according to fig3 to 6 in that the supports 17 cannot only be pivoted out but are also extendable furthermore in that in the housing 8 attachment 18 for connecting solar collector 4 and parcel shelf 3 are provided wherein one or a plurality of attachments 18 not only serve for the mechanical connecting but equally for electrically contacting electrical components of the solar collector 4 and electrical components of the parcel shelf 4 fig7 illustrates one of the two supports 17 both in a.