I installed my three meter DC MONITORING PANEL when we first got into taking the OFF-ROAD POPUP camper off the power grid. It is very important to us to monitor the batteries.
My three panel meter group consists of two digital DC VOLTMETERs which is direct connected right at my battery bank source and one digital +/- 75AMP DC Current meter which measures both input and output DC currents for my battery bank.
My meters was purchased from SURE ELECTRONICS ebay/china back in 2009 and now they don't have the HALL EFFECT DC Current meter anymore. Wish I had purchased a couple of them back then. They are installed in a standard PVC three switch electrical box (LOWES). All cabling is using PVC flexible conduit to the battery bank main Blue sea 4-position battery switch.
My MONITOR PANEL is installed on the side of a cabinet just as you come into my trailer. Easy view both from the inside and outside standing next to the opened door.