My RV has four 6v AGM batteries wired in series/parallel. Two batteries (connected serially) are in the front engine compartment, two batteries (presumably also connected serially) are in a tray underneath the chassis at the back of the RV (difficult to see/access). The batteries in the front are grounded to the chassis and there is no wire from a negative post back to the back of the RV. I assume the back batteries are grounded to the chassis in the rear. Can I install the shunt on the negative to ground wire on just the front two batteries and get meaningful data from the monitor? If I configure the monitor with the capacity of just two (instead of four) batteries, will I effectively get usage data reflecting all four, since they are all connected together anyway? It seems to me that both the front pair and rear pair of batteries should show equivalent draw/charge data, equivalent voltage, etc. If the front two batteries are low, then the rear two batteries are low too. Would there be any distortion of monitoring data in this case?
