Just be aware in
Europe 30ma RCBO ( comboned residual circuit breaker and overload ) ie a CB and ELCI are available In a wide range of overload currents and are widely used as whole house protection devices so commonly available in our equivalent of Home Depot. The consumer boards in houses are all now DIN rail based do all these devices are hence DiN rail based. They are ubiquitous and resonantly
cheap. They are used in all sorts of mains
wiring projects in industrial,
marinas , and as whole
boat protection
This is why 30ma is used as anything less on a whole supply basis will cause nuisance trips. 30ma is beyond the " hold release
current " but Europeans can handle more shock
current being tougher !!!!!!!( sorry couldn't resist )
In the US whole system ground fault protection is less common and code tends to protects the outlets with individual 5mA interrupters. ( which are not overload breakers )
Be aware that some of these RCBOs are not great in
salt enviroments, I've had Legrande units
rot out after about 10 years.
So of you want the
boat to US code and its a 110Vac install use GFCI outlets rather then a RCBO on the output of the
inverter. Whereas a French
electrical will be inclined to suggest a 30 mA on the output of the inverter. Either will do , but don't do both that's jus a waste of
money
Dave