110 volt outlet on dash

[Jerry Bergstrand]

2021 F350 with plug on dash. It only produces about 95 volts. Every other truck I have checked is putting out about 105 volts. My dealer tells me my truck is ”normal”. I think they can’t find the problem? Anyone have an opinion?

 

[Anyoceans]

95v A/C is not normal. Does voltage rise when a load is applied?

 

[scrook]

2021 F350 with plug on dash. It only produces about 95 volts. Every other truck I have checked is putting out about 105 volts. My dealer tells me my truck is ”normal”. I think they can’t find the problem? Anyone have an opinion?

You may need to use a True RMS reading DVM to see the correct voltage (should be ~ 120 VAC) as the inverter is likely not supplying a true sine wave but a square wave or (likely) a stepped (“modified”) square wave approximation to a sine wave. A cheaper non RMS DVM will not be accurate for non-sinusoidal waveforms.

 

[Jerry Bergstrand]

You may need to use a True RMS reading DVM to see the correct voltage (should be ~ 120 VAC) as the inverter is likely not supplying a true sine wave but a square wave or (likely) a stepped (“modified”) square wave approximation to a sine wave. A cheaper non RMS DVM will not be accurate for non-sinusoidal waveforms.

This sounds very logical. However, I used the same volt meter to check all the different vehicles. Mine said 95v and the other vehicles said 105 volts. ??