The Battery Monitor model ME-BMK from Magnum Energy gives you a "fuel gauge" type of meter for your batteries. It gives you the "percentage of charge" for your battery bank. This monitor reports state of charge, real time amps, amp hours in/out, and minimum/maximum DC volts.
The kit includes the Sense Module, sense and communication cables, and a 500 amp shunt. Requires a Magnum Inverter with a "Network" Port and the ME-RC remote version 2.0 or higher. The Network Port share the data from the Sense Module to the Remote Display.