Salvo,
Don't know how to ask this question but here goes.
Does a MPPT controller try to give maximum power out at any converter output voltage, that is if the output (battery voltage plus voltage drops) is 11 volts will the controller try to match the maximum power of the panel to the 11 volt load. And if the output voltage goes up to 13 volts will the controller track this and try to match the maximum power of the panel to the 13 volt load? If it does how does the set point play into this other than to shut of charge? I must not understand what a MPPT controller does.