Be aware of what is running on your 12VDC system and what is on the 120(110) VAC systems. Batteries supply the 12 volt to lights, starter, pressure water pump (sinks), stereo, helm. 120VAC is supplied from short power (or onboard generator). It can also supply Fridge, however it exclusively supplies stove, microwave, Air Conditioning, battery charger.
The main breaker panel is for 120VAC only. The items you listed in troubleshooting are mostly 120VAC and would not be applicable.
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