... ,Certificate of ISO9001:2008. Automatic voltage regulator SY-AVR-2058 1,Introduction:Model: 2058 series Introduction: SY-AVR-2058 generator automatic voltage regulators (AVR) are specifically designed to ... system, e.g. engine controller, water preheater, automatic voltage regulator, generator synchronizer, genset controller, power factor regulator, fuel solenoid, charger for engine start battery ...