Sounds as if you need to stay at Home to enjoy the luxury of a fully Air Conditioned living
environment, spending any time on a boat (any boat) is all a question of compromise.
Constantly expecting to run THREE A/C units and other
electrical equipment simultaneously which incurs maximum loading on the
Generator you can fully anticipate problems with breakers and other components in the associated
Electrical System.
Also, If you're resetting the breaker under load, you will also trash the breaker really quickly by building up the layers of carbon on the breaker contacts every time the contacts are manually reset, this carbon layering is caused by the
Arc or Spark at the contacts when the circuit is re-established while under load.
Please remember to isolate ALL circuits prior to resetting the breaker which has tripped, if you don't, then you're exposing your
family and friends to a possible dangerous situation of fire or even explosion if any
propane should be creeping around the lower areas of your vessel.
Change the breaker immediately and run your
electrical system where it's comfortable and therefore reliable i.e. 70 - 80% of full load.
If you run anything at Max it will fail sooner than later....