I went with just three panel meters with two DC VOLTMETERS monitoring both my battery banks and one DC AMPMETER monitoring the selected input/output feeding the battery banks. The monitoring is crucial if you want to know what is happening to your batteries when camping off the power grid..
The only thing I would like to have now is remote alarms to tell me I am approaching 50% charge state which the TRIMETRIC provides.
All of my battery wiring is using PVC flexible conduit and PVC Electrical Junction boxes as well.
Roy Ken