I was going to replace my WF8945 WFCO Converter with my PD9260C Converter/charger chassis only unit. After I got it home to install I decided to leave all of my WFCO as it and installed the PD9260C Smart Mode Converter/Charger stand alone on the inside wall closest to the battery bank... I just flip the 120VAC Breaker for which converter/charger unit I want to operate. Since my WF8945 was relative new it now serves as a backup unit.

This is my schematic on what I did...

This is my floor plan layout pictorial showing where the WFCO and PD units are located.

My two each 300AH batteries shown here is future planned mod..
food for thought...
Roy Ken