Here is the schematic of how the Current Sensor interfaces to my Solar Batteries and the Arduino monitor. It is very simple, just an 8 volt DC supply for the Current Sensor and a limiting resistor in series with the output to the Arduino inputs.
I have now added a SDdata logger shield to the Arduino solar monitor and will soon add a second current sensor for the 240 inverter power usage. This will enable me to track/log all power for the whole system. Solar power in, the battery stored energy and all power out (household and other DC). I can log most household items electrical usage just by inspecting the current monitors and their derivatives. more on this later.