First, Debbie, WELCOME!
People often "say" things with their fingertips that the rest of their senses like sight and sound wouldn't allow.
V*A=W, true enough. Problem is, appliances etc. want W, so if V goes down, A actually goes UP and A is a major cause of heat.
I just got back from a state park. Park wasn't near full, voltage started around that 118, dropped to 115, then 108, 105, caught it just under 100. Breakers tripping in the Motorhome. This is a 30A coach with 15K A/C. This was happening with only A/C and Convertor. Debbie, one of your 120VAC breakers should be Converter, but probably other things on it that you don't want to power off for long. Still, you could do a test.
So, I complain to the Park, and they send their maintenance man over. Told me he's replaced all the pedestal breakers and outlets. I said I noticed that, my problem was that my A/C was tripping the 20A breaker in the coach and sometimes both the 20A A/C breaker and the 30A main. (that can happen because one breaker heats up the other - I had a small fan blowing on the breaker panel!) Maintenance guy says they have a capital budget request, not funded, to pull all new power service in the campground, about 40 sites. But meanwhile, we were on a loop with 30A breakers and outlets. 10 sites in that loop, powered from a loop with a single One Hundred Amp Fuse! So, 30A "service" that's more like 10A, 100A source divided by possibly 10 users.
So Debbie, YES. Keep coming back.