A road vehicle

t A road vehicle provided with a battery module, a chassis comprising a first and a second elongate chassis beam and a battery module mounting system for mounting the battery module to the chassis. The battery mounting system comprises a U-shaped top plate having a base portion and two arm portions, each arm portion being connected to an inner surface of a respective first and second elongate chassis beam. The base portion horizontally extends between the first and second elongate chassis beams. A battery module carrier substructure unit extends below and transverse to the first or second elongate chassis beam and comprises four L-profiles extending parallel to the first and second elongate chassis beams, two U-shaped endplates between which the four L-profiles are connected and two Z-profiles connected to and extending parallel to the first and second elongate chassis beams between the U-shaped endplates. The Z- profiles are attached to outer surfaces of the first and second elongate chassis beams. The distance between the U-shaped endplates is configured for receiving the battery module and the battery module is supported by adjacent L-profiles or by a Z-profile and the respective adjacent L-profile.