The present invention relates to a mobile generator device (1) having at least one alignable solar panel (2a, 2b), wherein the solar panel (2a, 2b) can be moved in a transport position (TP) and at least one operating position (BP). The invention is characterized in that the generator device (1) has a housing shell (3a) with a peripheral area (4), wherein the solar panel (2a) is hinged to the housing shell (3a) so that the solar panel (2a) is in the transport position (TP) within the housing shell (3a) and does not project over the peripheral area (4). Moreover, the invention relates to a cooling system having the mobile generator device (1) according to the invention and a control, and a cooling device, in particular a 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 power supply of the cooling system is provided by the mobile generator device (1) and the control regulates the cooling system in dependence of the power supply.