I was not on board to see exactly what happened. The person there said he heard a loud buzz and a pop and down goes TV. I did not have my panel split properly and I suspect we lost shore power and the whole load hit the 3-8d's going through a auto switched mod pro mariner mod sine wave inverter. Air con, water heater was on the load.
Now I only use inverted power sparingly. All refrigeration, lights, fans and so forth is 12 volt. I have a Samplex 1.5 kW pure sine wave inverter that has 1 outlet. I have to manually plug into this separate circuit for inverted power. Really only used at anchor and load is closely monitored. Need more then I fire up the genset. AC and hot water is normally the only need because I have 1135 amps of stowage and 750 kW solar and 400 watts of wind.