Xantrex PROwatt 150 Owner's Manual page 15

Possible cause
Cigarette lighter or 12 volt outlet
fuse is blown.
Measured inverter output is too low.
Volt meter reading 5 to 15 volts too low.
Symptom
Possible cause
A standard "average-reading"
AC voltmeter is used to measure
output voltage.
Battery voltage is too low.
Suggested Remedy
Check the vehicle fuses and replace blown
fuse with correct value.
Suggested remedy
The PROwatt 150 modified sine wave out-
put requires a "true RMS" voltmeter, such
as Fluke 87 series multimeter, for accurate
measurement.
Recharge the battery.
15