The function of the Automatic Voltage Regulator (AVR), which is a replaceable component inside your generator alternator, is to maintain constant voltage and power line conditioning to the equipment load under a wide variety of conditions, even when the utility input voltage, frequency or system load vary widely.

The Automatic Voltage Regulator (AVR) needs replacement if your generator is running but is not producing any output. The biggest cause of an AVR becoming defective is having an unbalanced load.

AVR type