Oops, my bad... I was thinking about 12 volt loads... Goofy me...
So hmmm... I am now thinking that you likely have a loose connection. I have seen loose connections get red hot and because they are trying to get a lot of power through a high resistance point...aka, the screw terminal that is not tight so only making connection at a few points on the wire... that point heats up to red hot and causes high resistance, hence high current through the total circuit, and the circuit will blow in protection.
You should take the covers off your converter and breaker panel and check all the wiring connections. Not just the power ones, it could just as easy be a neutral line. Likely you will see the high resistance point because of the heat stress it has already caused.
Of course, this should be done with the power disconnected and all breakers off. The way you describe the heat in the converter panel points me to that point in the circuitry first. If you do find it there, tighten all connections rather than just that one, it only takes a few minutes more and is very good preventative maintenance.