TG,
I 'third' what has been said above, but just to be certain, remove the Go-Power control panel and you will see 4 wires going to/from it........2 incoming from the solar array and 2 outgoing to the batterie(s). Trace the wires to the batteries, and they should terminate directly AT the batteries, or perhaps at the bus bar just ahead of the batteries.
This means that the array is charging the batteries directly and by-passing the solenoid that the Intellitec 'Store/Use' switch operates.