One last post on my voltage issue.
I have a 100' extension that runs from the house to the shed. It is just a typical, junky orange extension cord. The trailer is parked near the shed, I use that extension mostly to keep the fridge cool and the battery charged. When we got home today, I could hear the fan on the inverter running, wife had just taken out the food stuff that needed to go in the house, so the fridge was probably running as well. 4 amp draw, 113 volts, zero errors.
YES....I know that cheapy extension is not ideal for plugging the trailer in to. I need a new panel before I can run a 50 amp service to that area. Still, that extension is doing better than that CG's power source.
