PR Express Panel PWM Solisto SOL-30-NC Sunwize power-ready express control panels are prewired aluminum panels, designed for stand-alone PV systems. This control panel has all of the necessary switchgear to hook up the charge/load controller to a solar array, battery bank, and load. Charge Controller supports 12V or 24v batteries. The control panel consists of an aluminum backplate; a charge controller; two load terminals; and breakers for the array, battery, and load. All breakers are sized to match the rating of the charge controller.