Hello!
Is there any way to adjust the voltage on the 2015 built in 400w inverter?

I'm only getting 90v from it.

Thanks.

 

I would say if you're only getting 90 volts and you're not trying to run something like a microwave oven or small table saw you most likely have a defective inverter.

A trip to your local dealer should fix you up.

 

So, I just thought I would post an update to this for those interested.

I took my truck to the dealer to have the inverted fixed.

When I sat down in the waiting room, one of the techs came out and told me that 90-96 volts was perfectly normal and that Ford only specifies a maximum wattage allowed in the inverted but doesn't have a specification for the voltage that comes out of it. When I asked him why then does it show "110v" on the plate where the outlet is he got upset and started arguing with me.

I took my multi meter and measured the voltage on 15 trucks on the lot.

Every. Single. One. measured between 90 and 96 volts, with the average being 92 volts.

How can this be possible or normal?

 

I had the same issue with my 2016 F-150 that I picked up in May, 2016.
My oscilloscope showed the typical inverter square wave and the frequency checked good at 60 Hz with the voltage at 92.
However, I rechecked the voltage with a 100 watt load on the inverter and it jumped up to 106 volts.
In all fairness to the inverter, the voltage should be checked under load....maybe even a range of loads.