ZBROZ WINCH SOLENOID CONTROLLER KIT FOR GEN 1 WHINCHES. ZBROZ winch solenoid controller is a device that acts as the switch to activate the powerful electric motor within our winch, essentially controlling when the winch can pull in or out by sending a high current to the motor through a solenoid, allowing for safe and efficient operation of the winch with a smaller control switch; it's basically the brain of the winch system that manages the power flow to the motor.