new charger inverter

[undercutter]

Wondering if anyone can steer me in the right direction.

Presently we have a Freedom 25 inverter charger installed on the boat which needs replacing. 14 years old and 50hz/220v model. Ordered a mastervolt 12/4000 50hz/220v which will take everthing from 185-250 volt input 45-65hz.

While studying up for the installation today I realized that the AC wiring configuration is slightly different as the high amperage bus on the existing AC panel set up is fed directly from the shorepower,genset switch through a 50 amp circuit breaker which also supplies ac power to the charger. On the new charger inverter the recommended setup is to run all the AC through a breaker to the inverter/charger which then splits the output between a nonswitched AC output and a "shortbreak AC output" which is either supplied by the incoming AC through a relay or from the inverted DC power from the batteries. This allows the unit to regulate the AC output on both leads with several fancy functions including power sharing, power support, etc.

Question is this: Since there is only 1 set of wires for the output currently installed and the new configuration would require another heavier set to be installed along with rewiring the inputs to the buses, is it really necessary to do this or can I just leave the heavy loads wired directly to the main bus and only use the short break circuit as it is currently set up. I know that this would preclude the use of some of the functions of the new inverter charger such as power support but I really don't think that this is required as we have never experienced an issue where the genset(7kv) or shorepower (50amp min) cannot supply the needs of the boat.

I may be missing something due to the frequency input/output but I don't know for sure as I assume that the unit doesn't do anything with the AC power when not inverting except close the relay to the short break circuit when charging the batteries.

Thanks for the help