Possible cause | Suggested remedy |
The lighter socket or the 12 volt outlet may require that the ignition be switched on.
The cigarette lighter fuse or the 12 volt outlet fuse is blown.
Turn the key to the accessory position.
Check the vehicle fuses, and replace the blown fuse with the correct type and size.
Measured inverter output voltage is too low.
Symptom The AC voltmeter reading is 5 to 15 volts too low.
Possible cause | Suggested remedy |
A standard “average reading” AC voltmeter has been used to measure the output voltage.
For accuracy, the XPower 150 modified sine wave output needs to be measured with a “true RMS” voltmeter, like a Fluke 87 series multimeter.
The battery voltage is too low. Recharge the battery.
Battery operating time is less than expected. Symptom The inverter runs for a while, and then the 
light comes on. The inverter is cool or warm to touch.
Possible cause | Suggested remedy |
The battery is old or defective.
The battery is not being charged properly.
Replace the battery.
Have a qualified technician check the vehicle’s electrical system.
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