Alternator Voltage Reducer
For boats with a smart alternator, an Alternator Voltage
Reducer, AVR can be installed on the AUX bus. The
AVR reduces the alternator voltage to prevent
overcharging of batteries that are installed in hot
climates. The conventional charging voltage without
AVR is designed for 20 degrees battery temperature.
The AVR is optimal to use for battery surroundings
when temperature is 40 degrees, which implies
charging of 14.0±0.3V for 12V systems, and 28.0±0.3V
for 24V systems.
If the standard alternator is malfunctioning, there will
be a low-voltage alarm showing on the display. If the
extra alternator is malfunctioning, there will be no low-
voltage alarm showing in the display. Therefore the
AVR needs to be checked first to investigate the
malfunction.
There are two lights located at the bottom of the
interface.
Green light (A): Power is ON
Yellow light (B): Power is ON, but no communication
received between engine and the alternator.
Slow flashing yellow light (B): Communication
received, but all engines are shut off.
Fast flashing yellow light (B): Communication
received, at least one engine is running and control of
alternator is in operation.
NOTICE! If alternator still not charging after the
investigation, please contact Volvo Penta dealer.
Optional
47712786 11-2022 © AB VOLVO PENTA 89
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