The solar controller's "battery" terminals and the battery are on the opposite ends of the same wire and will have almost the same voltage, so you can get "battery voltage" from the ASC, inside the rig. You don't really need the voltage at the ASC's "array" terminals.
Each day, you watch for the solar to bring the battery to 14.3 volts (or as set if variable) and then the controller starts controlling.
It is a "shunt" type controller, so watching the voltage when it is doing its on and off thing will make you dizzy. (I had an ASC some years ago and could see all that action on the Trimetric)
You are not telling us the story on why your battery was/is at 11 volts, but that is your privilege :)
