Auto Voltage Regulator 1,Designed for a brush/brushless AC generator. 2,Certificate of ISO9001:2008. Automatic voltage regulator SY-AVR-2058(For more information, pls visit our website ... , e.g. engine controller, water preheater, automatic voltage regulator, generator synchronizer, genset controller, power factor regulator, fuel solenoid, charger for engine start battery, actuator, speed controller ...