You are making this very hard.... All that needs to be done is remove the components in the bottom of your older Magnetek 6345 converter Chassis and just replace the bottom converter chassis electronics with a modern PD-9245 or PD-4645 to keep your same DC Current presently being used.
I would go to a 60AMP Converter unit just in case you add more batteries to the battery bank. If yo ever want to charge your battery bank in a quick three hour time frame you will need 14.4VDC with the capacity of 17-20AMPS DC for each of the batteries in your battery bank.
You keep all of the top boards in place of your current Magnetek 6345 that has the 120VAC Circuit Breakers and 12VDC Fuses. There is no need for wiring changes for any of your RV wiring. You simply remove the large DC cables from the converter chassis in the bottom compartment and replace that with a new converter chassis which only needs to be wired for its 120VAC and the three 12VDC WIRE CABLE going to the top units...
check out this series of photos this guy did with his Magnetek 6300 unit to give you an idea what is required. He is actually adding too much info making it look more complicated then it actually is but he wanted to cover every little detail...
The photos in his report is great to under stand what you will need to do...
MAGNETEK CoNVERSION
When I changed out my 35AMP Converter/Charger sytems all I had was 35AMP boox with four to five fused cables coming out of the back and all the 120VAC and 12VDC where divided up behind the the converter/charger unit and connected using the large YELLOW TWIST typee connections. I had to rewire all of my wiring in the case as I did not have the group of 120VAC Circuit breakers and 12VDC fuses panel... Wasn't really too bad or take very long as all the wires were already there. Just had to hook them up inside the new WF-8900 Power Distribution panel I used. Then in the bottom compartment I added my PD-9260C Converter/charger unit and hooked up the 120VAC cables to above Circuit Breaker and 12VDC cables to the top unit 12VDC DC BAT position lugs where required.
I would get the 12VDC Converter/charger unit problem solved first then start thinking about adding your solar panel and others changes you have in mind to do.
This is not really complicated...
Roy Ken
