Abstract: An inductive energy transfer system supplies energy from a stationary primary rail to a number of movable secondary rails each connected to a movable unit. The system is particularly suited for conveyor units of a sorter system, each unit having an article support, the energy provided from the energy transfer system being used primarily for discharging articles from the article-support. The primary rail as well as the secondary rails are provided with legs so that the legs in an operational position are overlapping so as to reduce the losses caused by the air gap between the primary rail and the secondary rails. The movable units are each equipped with an electrical battery for smoothing the load from the movable unit on the primary side of the transfer system.