I read that it is recommended to include an earth leakage crcuit breaker when installing a Phoenix 12/1600 in a steel boat. Now I wonder whether including a normal 10A circuitbreaker in the circuit also has benefits. Or does including a circuit breaker come with disadvantages, as the inverter already has overload protection?
A Fi switch at the output would be recommended in any case … regardless of whether it is a steel hull or something else. The Fi should only switch off in the event of a fault current that is dangerous to people. Of course, this can also apply to the hull structure.
In my opinion, the overload cut-off should only occur with even smaller devices at approx. 2A. An automatic circuit breaker is certainly prescribed, but as you have already written, the internal overload always comes first.
If you use an RCD, check the instructions again for the jumper in the appliance … you can move it to create a connection between N and PE. Otherwise the RCD will not work.
