Xantrex XPower 75/175 Manual Del Usuario página 15

Probable cause
Battery is discharged.
Vehicle fuse blown by
heavy load on 12 V
outlet.
Problem: Buzzing sound in audio systems
Inexpensive stereo systems have an inadequate
internal power supply filtering which causes a
buzzing sound. A system with a high quality
filter is the only solution.
6
Suggested remedy
Recharge battery.
Replace the fuse on the
vehicle's 12 V outlet.
Use a lower power
load.