Solar controllers only show what the solar panels are doing, not what is going to the battery and how they are doing. Solar output goes to rig systems first, and anything left over goes to the batteries. Same with converters.
A Trimetric monitor on the batteries only shows what is happening with the batteries, including whatever the solar can provide from upstream of the Tri's shunt. You have to subtract the Trimetric amps from the solar amps to see how many amps are going to other loads.
There is a solar controller that has two shunts ISTR that does both jobs, forget its name.
