I would like to thank everyone that gave me the suggestions and options for planning my electrical upgrade.
I have made the plan and thought I would share it.
Install the Sure Power 1315-200 bi-directional Battery isolator.
Add a fuse holder and fuse at the front battery
Use existing 1/0 Cable to the rear Batteries
Add Fuse holder and fuse the 1/0 cable at the Rear Batteries (2 group 29)
Remove the existing the converter/charger from under the main Dist Panel
Replace the existing Push-Matic 15A breaker with a 20A push-matic
Install 4" box, 20A receptacle using 12/2 romex and cover.
Install Progressive Dynamics 9280V Intella-Power 80A charger/Converter
Install Charge wizard pendant and mount at RV status Panel.
Being winter in New England, Ill be trying to plan nice days to work on this. For now, Let the Ordering begin !
Any other ideas or Suggestions ?