Cptnvideo,
On the Magnum with load support active, voltage can and does drop. Hence I monitor the voltage. It only matters for motors in items such as the air conditioner.
I do go to one location every year were the line voltage unloaded is 100 volts. If I use the autoformer, I can run the roof air. If I don't use it, then I can't.
My brother's cottage has a similar issue but not quite as bad. Unloaded voltage is about 117. Under load that drops a LOT. (I don't remember the exact numbers, but I definitely need the autoformer if I wish to run the roof air.) The shore power is a 50 amp plug, so there is no lack of amperage.
I do use the autoformer when using electric heat as output varies by the square of loaded voltage.
