The invention relates to a mobile generator device (11) having at least one directional solar panel (2a, 2b), wherein the solar panel (2a, 2b) can be moved into a transport position (TP) and at least one operation position (BP). The invention is characterized in that the generator device (1) is provided with a housing shell (3a) having an edge area (4), wherein the solar panel (2a) is hinged to the housing shell (3a), such that in the transport position (TP), the solar panel (2a) is inside the housing shell (3a) and does not project beyond the edge area (4). The invention further relates to a cooling system comprising a mobile generator device (1) according to the invention, a control, and a cooling device, in particular a chest freezer, having at least one cooling circuit, wherein the cooling circuit has a compressor, an evaporator, and a condenser. The cooling system according to the invention is characterized in that the energy supply of the cooling system is provided by means of the mobile generator device (1) and the control regulates the cooling system as a function of the energy supply.