Thanks for the input. It's good to know that I am on the right track and that all of the research I did on this system was accurate.
We lived with the 30A charger for several years without any issues so I'm sure the 45A will serve us well, especially since, as you mentioned, we will be pretty much all solar from this point on. The only times we ever connected to 30A service before was in the summer, when it regularly tops triple digits here, we would run the AC with a 4k generator only while we cleaned up and packed up to leave. The other time is when we got home and parked it to charge the batteries. Now I won't even have to plug it in to charge.