Methods for controlling irrigation devices coupled to and receiving operational power from a multi-wire interface of an irrigation system, and related irrigation devices, are provided. In some forms, the methods define initialization of the irrigation devices having received operational power, including the timing of charging, discharging and recharging of the irrigation devices in order to provide a time staggered recharging of the energy reserves of the irrigation devices. In some forms, the methods involve the use of different delay periods at different irrigation devices coupled to irrigation valves to place multiple irrigation valves into a known position. In some embodiments, these methods spread out the usage of charging energy drawn from the multi-wire interface by the irrigation devices coupled thereto to reduce inrush currents.