The total AC-In of a MP II 5000 will not go over 4600W. The AC in limit is set at 50A in the VE configure (+overrulled by GX) - the power assist is turned off. 2 Pictures attached where it can be seen that if the AC1-out increases, the charger will go down to the limit the total AC-in to 4600W.
Lowering the AC-in setting at the GX does limit the AC-in at the desired lower value. (just to check if the GX is actually overruling the VEconfigure setting)