The main thing for replacement in place is the 120v input required. A 55amp converter that is single stage 13.8v does not need as much as a 55amp converter that gets to 14.6V
You can replace a 60amp non-pf corrected converter with a 75amp pf corrected converter. Similar AC input required.
If you deck mount a new converter where you have to wire in a 120v source for it anyway that is different.
It doesn't matter if the new converter will do way more DC amps than needed, as long as it has proper input wiring. BTW a PD9280 requires a 20a circuit but the PowerMax or WFCO 100amper can run on a 15a circuit because of pf correction.
