They only checked at the pole with no load. I think you may be correct here I am going to get one of those testers so I can be sure I am getting what I need when plugged in.
It did not even occur to me to have them check while under load. I was more worried there was something wrong with the rig and it would cut our trip short. It ran fine the rest of the weekend with the fridge AC and lights. The next morning we had the AC fridge and coffee pot going so I think you may be on to something here.
I will have it checked for piece of mind that there is no issues with the system.
Better safe than sorry. Next trip August 14th so hopefully all will be fixed up.