until you pull it out you will not know .
Very few manufactures install a distribution panel separate from the converter . But this may be an exception . Also if it is true I WOULD NOT install another wfco branded converter in its place
my guess is you have the last one . Now if you open your panel front door your model number is clearly posted on it so that you know what your dealing with
In my previous post I stated that even if you have the combined unit you can STILL replace JUST the converter and not the whole panel .
With that being said IF you do NOT have the knowledge and means to do it you probably shouldn't .I am guessing since you have never had a volt/ohm meter that your experience is limited NOT that you cant do it .
When my converter gave up the ghost I have never even looked at a wfco electrical panel short of opening up the front before I dug into it .
I pulled my unit out and then proceeded to dismantle and remove the converter. After doing some extensive reading I soon realized that I could replace my wfco converter with a much better converter <progressive dynamics> My existing converter was 55 amp which I thought was to small anyway so I replaced it with a 75 amp with charge wizard .
I had to modify the case slightly with a dremmel to make it fit but I fit perfectly when I was done.
this whole process took a couple of hours .
You can replace the wfco unit but I think its a waste since the only thing BAD is the converter .
IF you need anymore info pm me Id be glad to help .
There is only one way to learn and thats to gather information before you dive into something your unsure of .