A shelving system comprising a mounting surface and at least one shelf unit, the mounting surface comprises a plurality of mounting holes and one or more elongate power supply rails, the at least one shelf unit comprises aback face comprising at least two thru holes adapted for mounting the shelf unit on the mounting surface, the at least one shelf unit comprises power fittings, wherein the shelving system comprises a first power supply bracket and at least one flexible power cable comprising a first and a second end, the at least one flexible power cable is at the first end electrically connected to the first power supply bracket, and the second end of the at least one flexible power cable is electrically connected to the power fittings of the at least one shelf unit, and the first power supply bracket adapted to electrically connect the first end of the at least one flexible power cable and one of the one or more elongate power supply rails, the shelving system adapted to supply power from the elongate power supply rails to electronics connected to the power fittings at or inside the at least one shelf unit.