The invention relates to an airborne power grid for a motor vehicle, wherein the airborne power grid comprises a low voltage subnet and a high voltage subnet, the low voltage subnet comprises at least one other load and a starter, the high voltage subnet comprises at least one other load and a starter, the high voltage subnet is connected with the low voltage subnet through a coupling unit, the coupling unit is designed for acquiring energy to provide the same for the low voltage subnet, the high voltage subnet comprises a battery which is designed for generating high voltage and outputting the same to the high voltage subnet, and the battery comprises at least two battery cells with wire section which is guided to the coupling unit. The coupling unit is designed for selectively connecting the battery cells to the low voltage subnet herein. The invention also comprises motor vehicle equipped with a internal combustion engine and the above airborne power grid.