Make sure you check both the generator water intake system and strainers but more importantly the port AC water intake and strainer. You stated the port AC breaker is tripping not the generator. It’s possible the generator could be reaching capacity and surging causing the port AC trip so look at both. Charging IPads ect.. is trivial toward total load. You might however consider shutting the battery charger down just before you go to sleep if it can be isolated from the inverter. It does pull a load. I doubt the boat has a watermaker but absolutely shut that down if it does. They are a very high draw item.
On most Gensets you can tell if it’s reaching capacity as you will feel the Genset surge and rumble just a bit.On my boat if this happens it will kick the AC chiller off. To get that load I need all AC units on along with the watermaker and battery charger.