The invention relates to a system (10) for powering display devices (11) for displaying goods-related information, comprising an elongate base body (12) and at least one closure device (14). The main part (12) has a channel (16) for receiving the display devices (11), and the main part (12) has two end portions (18). Each end portion (18) has one of two channel (16) end portions (20) in which the display devices (11) can be received. The system (10) has at least two current conductors (21, 22) which are arranged in the channel (16), and a power supply contact (28) of each display device (11) can be contacted with a respective current conductors (21, 22) by receiving the display devices (11) in the channel (16). By connecting the closure device (14) to the end portion (18) of the main part (12), a respective supply line (32, 34) of the closure device (14) can be contacted with the current conductors (21, 22). The invention also relates to a goods presentation system and to a method.