Regarding the power distribution center
I do like the concept of the PD center and converter being independent. I had to replace my Progressive Dynamics 9180 (with wizard but I re-used him) and it was not even a 20 minute job.> Remove 3 screws. Disconnect ground. Remove unit (Unplug first mine is a plug in) disconnect and protect two big heavy wires. Haul 17 miles to Marshall from where I was parked (ok that part took more than 20 mintues) set on desk, get new one, take old one out so I can de-engineer and fix later (have yet to get round to) take new one out and back to Truck stop. hook up two wires. Plug in and go.. In the snow.. To a place where the snow did not go.. I put in the mounting screws and re-connected the chassis ground later.
Took almost as long to type as it did to do.
Learned much in the progress.
As for power distribution panels.. 120 volt. whatever floats your desire.
12 volt (mine are independent of each other) Progressive Dynamics (makes both independent and combined and integrated by the way) have lovely little Red LED's that light if you pop a fuse.. Handy to help find the popp-a-matic fuse.